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【327922】2024年黑龙江省绥化市中考数学试题

时间:2025-01-20 20:42:22 作者: 字数:24495字
简介:

绝密★启用前

200686-2024年黑龙江省绥化市中考数学试题


学校:___________姓名:___________班级:___________考号:___________


题号

总分

得分






注意事项:

1.答题前填写好自己的姓名、班级、考号等信息

2.请将答案正确填写在答题卡上


一、单选题

1.实数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的相反数是(      )

A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>     B  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>     C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>     D  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

2.下列所述图形中,是轴对称图形但不是中心对称图形的是  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>     <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

A.圆    B.菱形    C.平行四边形    D.等腰三角形

3.某几何体是由完全相同的小正方体组合而成,如图是这个几何体的三视图,那么构成这个几何体的小正方体的个数是(      )

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

A. 5B. 6C. 7D. 8

4.若式子  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 有意义,则  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的取值范围是(      )

A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>     B  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>     C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>     D  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

5.下列计算中,结果正确的是(      )

A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>     B  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>     D  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

6.小影与小冬一起写作业,在解一道一元二次方程时,小影在化简过程中写错了常数项,因而得到方程的两个根是61;小冬在化简过程中写错了一次项的系数,因而得到方程的两个根是  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .则原来的方程是(      )

A.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> B.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

C.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> D.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

7.某品牌女运动鞋专卖店,老板统计了一周内不同鞋码运动鞋的销售量如表:

鞋码

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

平均每天销售量/

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

如果每双鞋的利润相同,你认为老板最关注的销售数据是下列统计量中的(      )

A.平均数    B.中位数    C.众数    D.方差

8.一艘货轮在静水中的航速为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,它以该航速沿江顺流航行  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 所用时间,与以该航速沿江逆流航行  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 所用时间相等,则江水的流速为(      )

A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>     B  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>     C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>     D  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

9.如图,矩形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 各顶点的坐标分别为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,以原点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 为位似中心,将这个矩形按相似比  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 缩小,则顶点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 在第一象限对应点的坐标是(      )

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

(第10题图)

A.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> B.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> C.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> D.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

10.下列叙述正确的是(      )

A.顺次连接平行四边形各边中点一定能得到一个矩形

B.平分弦的直径垂直于弦

C.物体在灯泡发出的光照射下形成的影子是中心投影

D.相等的圆心角所对的弧相等,所对的弦相等,所对的弦心距也相等

11.如图,四边形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是菱形,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,则  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的长是(      )

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

A.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> B. 6C.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> D. 12

12.二次函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的部分图象如图所示,对称轴为直线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,则下列结论中

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>     <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> m为任意实数)    <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是抛物线上不同的两个点,则  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .其中正确的结论有(      )

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

A1个    B2个    C3个    D4

二、填空题

13.中国的领水面积约为370 000 km2,将数370 000用科学记数法表示为:          

14.分解因式:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>       

15.如图,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .则  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>         <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

16.如图,用热气球的探测器测一栋楼的高度,从热气球上的点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 测得该楼顶部点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的仰角为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,测得底部点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的俯角为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 与楼  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的水平距离  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,则这栋楼的高度为      m(结果保留根号).

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

17.计算:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>          

18.用一个圆心角为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,半径为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的扇形作一个圆锥的侧面,这个圆锥的底面圆的半径为                 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

19.如图,已知点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,在平行四边形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,它的对角线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 与反比例函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的图象相交于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,且  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,则  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>       

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

20.如图,已知  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 内部一点,点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 为射线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 、点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 为射线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 上的两个动点,当  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的周长最小时,则  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>         

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

21.如图,已知  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> …,依此规律,则点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的坐标为      

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

22.在矩形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 在直线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 上,且  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,则点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 到矩形对角线所在直线的距离是                     <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

三、解答题

23.已知  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

(1)尺规作图:画出  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的重心  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .(保留作图痕迹,不要求写作法和证明)

(2)在(1)的条件下,连接  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .已知  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的面积等于  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,则  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的面积是        <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

24.为了落实国家“双减”政策,某中学在课后服务时间里,开展了音乐、体操、诵读、书法四项社团活动.为了了解七年级学生对社团活动的喜爱情况,该校从七年级全体学生中随机抽取了部分学生进行“你最喜欢哪一项社团活动”的问卷调查,每人必须选择一项社团活动(且只能选择一项).根据调查结果,绘制成如下两幅统计图.

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>   

请根据统计图中的信息,解答下列问题:

(1)参加本次问卷调查的学生共有      人.

(2)在扇形统计图中,A组所占的百分比是      ,并补全条形统计图.

(3)端午节前夕,学校计划进行课后服务成果展示,准备从这4个社团中随机抽取2个社团汇报展示.请用树状图法或列表法,求选中的2个社团恰好是BC的概率.

25.为了响应国家提倡的“节能环保”号召,某共享电动车公司准备投入资金购买  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 两种电动车.若购买  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 种电动车  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 辆、  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 种电动车  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 辆,需投入资金  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 万元;若购买  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 种电动车  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 辆、  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 种电动车  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 辆,需投入资金  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 万元.已知这两种电动车的单价不变.

(1)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 两种电动车的单价分别是多少元?

(2)为适应共享电动车出行市场需求,该公司计划购买  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 两种电动车  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 辆,其中  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 种电动车的数量不多于  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 种电动车数量的一半.当购买  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 种电动车多少辆时,所需的总费用最少,最少费用是多少元?

(3)该公司将购买的  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 两种电动车投放到出行市场后,发现消费者支付费用  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 元与骑行时间  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 之间的对应关系如图.其中  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 种电动车支付费用对应的函数为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 种电动车支付费用是  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 之内,起步价  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 元,对应的函数为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .请根据函数图象信息解决下列问题.

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>     

小刘每天早上需要骑行  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 种电动车或  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 种电动车去公司上班.已知两种电动车的平均行驶速度均为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (每次骑行均按平均速度行驶,其它因素忽略不计),小刘家到公司的距离为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,那么小刘选择      种电动车更省钱(填写  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ).

直接写出两种电动车支付费用相差  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 元时,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的值      

26.如图  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是正方形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 对角线上一点,以  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 为圆心,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 长为半径的  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 相切于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,与  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 相交于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

(1)求证:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 相切.

(2)若正方形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的边长为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,求  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的半径.

(3)如图2,在(2)的条件下,若点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是半径  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 上的一个动点,过点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .当  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 时,求  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的长.

27.综合与实践

问题情境

在一次综合与实践课上,老师让同学们以两个全等的等腰直角三角形纸片为操作对象.

纸片  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 满足  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

下面是创新小组的探究过程.

操作发现

1)如图1,取  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的中点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,将两张纸片放置在同一平面内,使点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 与点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 重合.当旋转  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 纸片交  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 边于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 边于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 时,设  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,请你探究出  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的函数关系式,并写出解答过程.

问题解决

2)如图2,在(1)的条件下连接  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,发现  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的周长是一个定值.请你写出这个定值,并说明理由.

拓展延伸

3)如图3,当点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 边上运动(不包括端点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ),且始终保持  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .请你直接写出  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 纸片的斜边  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 纸片的直角边所夹锐角的正切值                  (结果保留根号).

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>   

28.综合与探究

如图,在平面直角坐标系中,已知抛物线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 与直线相交于  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 两点,其中点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

(1)求该抛物线的函数解析式.

(2)过点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 轴交抛物线于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,连接  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,在抛物线上是否存在点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 使  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .若存在,请求出满足条件的所有点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的坐标;若不存在,请说明理由.(提示:依题意补全图形,并解答)

(3)将该抛物线向左平移  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 个单位长度得到  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,平移后的抛物线与原抛物线相交于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 为原抛物线对称轴上的一点,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是平面直角坐标系内的一点,当以点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 为顶点的四边形是菱形时,请直接写出点F的坐标.

参考答案

一、单选题

1. D

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的相反数是  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,故此答案D


2. D

A.是轴对形,也是中心形,故此选项错误

B.是轴对形,也是中心形,故此选项错误

C.不是轴对形,是中心形,故此选项错误

D.是轴对形,不是中心形,故此选项正确,

故此答案D


3. A

察三视图可得出,个几何体的底3个小正方体,第二2个小正方体,因此构成个几何体的小正方体的个数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (个).A.


4. C

解:式子  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 有意  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,解得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

故此答案C


5. A

解:A.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,故该选项正确,符合意;    

B.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,故该选项不正确,不符合意;

C.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,故该选项不正确,不符合意;    

D.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,故该选项不正确,不符合.

故此答案A


6. B

原来的方程  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .知,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,所以  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,所以方程  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .选项可知,原来的方程  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .故B


7. C

解:由于众数是数据中出次数最多的数,故老板最关注的售数据的统计量是众数.故此答案C


8. D

解:江水的流速  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

根据意可得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,解得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 经检验  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是原方程的根,

所以江水的流速  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

故此答案D


9. D

以原点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 位似中心,将个矩形按相似比  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 小,则顶B在第一象限对应点的坐  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,即  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,故D.


10. C

A. 接平行四形各中点不一定能得到一个矩形,故该选项不正确,不符合意;

B. 平分弦(非直径)的直径垂直于弦,故该选项不正确,不符合意;

C. 物体在灯泡出的光照射下形成的影子是中心投影,故该选项正确,符合意;

D. 在同或等 中,相等的心角所的弧相等,所的弦相等,所的弦心距也相等,故该选项不正确,不符合.

故此答案C


11. A

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是菱形,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,由勾股定理得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 菱形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的面积为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .A.


12. B

解:二次函数象开口向下,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,

轴为线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,

抛物线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 交于正半  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,故错误

抛物线开口向下,轴为线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 取得最大,最大值为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> m任意数),即  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,故正确;

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,即  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,故正确;

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是抛物线上不同的两个点,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 关于  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 称,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 不正确,正确的有②③.

故此答案B.


二、填空题

13. 3.7×105

科学数法是指:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,且 <, <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 原数的整数位数减一,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>


14.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>


15. 66

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>


16.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

解:依意, ,, <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>


17.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>


18.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

解:设这圆锥的底面的半径  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,由意得, ππ <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

解得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>


19.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

所示,分别过  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,作  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的垂线,垂足分别为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是平行四形,点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,即  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>


20.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

,作  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 点关于  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 称点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 连结  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .称易得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 点关于  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 称点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 连结  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .称易得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 线时  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的周最小.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,即  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,故答案  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

(第14题图

【关

的关是作出称点,利用称性得到相等的线段和角,而利用两点之间线段最短求解.


21.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

可知  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 个点坐标为一个循  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的坐标为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的坐标为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的坐标为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>


22.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是矩形,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

所示,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 交于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 上,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的延长线上,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的垂线,垂足分别为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 在射线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,在  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

上所述,点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 线所在直线的距离  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>


三、解答题

23. (1)见解析;(2)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

1)解:如所示,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

作法:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的垂直平分线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的垂直平分线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 相交于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

出点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 所求.

2)解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的重心,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的面等于  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的中点,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>


24. (1)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (2)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,作图见解析;(3)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

1)解:参加本次调查的学生共有  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (人);

2)解:A人数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

A所占的百分比  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

统计图所示,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>   

3)画法如下

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>   

列表法如下


A

B

C

D

A


 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

B

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>


 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

C

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>


 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

D

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>


法或列表法可以看出共有12果,它的可能性相等,中的2个社恰好是BC的情况有两种.

P中的2个社恰好是BC  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>


25. (1)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 两种电动车的单价分别为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 元、  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 元; (2)当购买  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 种电动车  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 辆时所需的总费用最少,最少费用为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 元; (3)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>     <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

1)解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 两种电动车价分别为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 元、  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 元,

意得,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,解得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

答:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 两种电动车价分别为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 元、  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 元;

2设购买  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 电动车  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 则购买  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 电动车  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

意得,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

解得,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

所需购买总费  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 元,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 随着  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的增大而减小,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 取正整数,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 最少,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 最少 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

答:当购买  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 电动车  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 辆时所需的总费用最少,最少  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 元;

3)解:①∵两种电动车的平均行速度均  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,小刘家到公司的距离  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

所用时间为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

根据函数象可得当  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 更省小刘选择  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 电动车更省

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,将  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 代入得,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,解得,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,将  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 代入得,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,解得,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

意,当  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,解得,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,解得,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (舍去)或  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>


26. (1)证明见解析 (2)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (3)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

1)方法一,明:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 相切于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是正方形,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是正方形的线

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的半径,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的半径,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 相切.

方法二,

明:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 相切于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是正方形,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的半径,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的半径,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 相切.

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

方法三:

明:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 相切,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 半径,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 正方形,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 矩形,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 正方形的线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 矩形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 正方形,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的半径,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的半径,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 相切.

2)解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 正方形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 相切于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 由(1)可知  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,又  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 正方形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 边长为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的半径  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

3)方法一:

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,由勾股定理得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,由勾股定理得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

方法二:

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的直径,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

方法三:

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的直径,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>


27. () <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,见解析;(22,见解析; () <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

操作发现

解:(1  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,且  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的中点,点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 与点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 重合,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>   

问题解决

2)方法一

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的周值为2

理由如下,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

将(1)中  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 代入得

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,又  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的周  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的周  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

方法二

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的周值为2

理由如下,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是等腰直角三角形,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

OAB的中点,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,作  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,作  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的周  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的中点,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的中点,同理点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的中点.

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的周  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>   

方法三

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的周值为2

理由如下,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,作  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,在  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 上截取一点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,使  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是等腰直角三角形,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的中点,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 平分  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

∴ ≌ <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的周  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的中点,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的中点,同理点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的中点.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的周  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>   

拓展延伸

() <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>   

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,作  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的垂直平分线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,由勾股定理得,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>   

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,作  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的垂直平分线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,由勾股定理得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>   


28. (1)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (2)存在,点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 坐标为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,补图见解析 (3)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

1)解:把点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 代入  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,解得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

2)存在.

理由:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (舍去),  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 交抛物线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 交抛物线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的解析式  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,解得 舍去 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ;或  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,解得 舍去 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 代入  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

上所述,足条件的点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 标为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

() <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

方法一:

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 为对线,如  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的垂直平分线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 交直线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的中点,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 为边

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 为圆心,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 半径画交直线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 相交于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,同理可得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,由勾股定理得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是由点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 向右平移  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 度,再向上平移  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 度得到的,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 为边

以点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 为圆心,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 长为半径画交直线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,由勾股定理得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 三点共线

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 相交于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的中点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的中点,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

上所述:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/1025/" title="绥化" class="c1" target="_blank">绥化</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>