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【327920】2024年黑龙江省牡丹江市中考数学试题

时间:2025-01-20 20:41:51 作者: 字数:22545字
简介:

绝密★启用前

200681-2024年黑龙江省牡丹江市中考数学试题


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.下列图形既是轴对称图形,又是中心对称图形的是(      )

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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

2.下列计算正确的是(      )

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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

3.由5个形状、大小完全相同的小正方体组合而成的几何体,其主视图和左视图如图所示,则搭建该几何体的方式有(      )

 <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

A1B2C3D4

4.某校八年级3班承担下周学校升旗任务,老师从备选的甲、乙、丙、丁四名同学中,选择两名担任升旗手,则甲、乙两名同学同时被选中的概率是(      )

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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

5.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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的内接四边形,  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的直径,若  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的度数为(      )

 <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

6.一种药品原价每盒48元,经过两次降价后每盒27元,两次降价的百分率相同,则每次降价的百分率为(      )

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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

7.如图是由一些同样大小的三角形按照一定规律所组成的图形,第1个图有4个三角形.第2个图有7个三角形,第3个图有10个三角形……按照此规律排列下去,第674个图中三角形的个数是(      )

 <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

A2022B2023C2024D2025

8.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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 在平面直角坐标系中的位置如图所示,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的图象与  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 边交于点  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 边交于点  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,若四边形  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的面积为2,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的值是(      )

 <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

9.小明同学手中有一张矩形纸片  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,他进行了如下操作:

第一步,如图,将矩形纸片对折,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 重合,得到折痕  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,将纸片展平.

第二步,如图,再一次折叠纸片,把  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 沿  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 折叠得到  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 交折痕  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,则线段  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的长为(      )

 <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

10.在平面直角坐标系中,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 轴交于  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 两点,  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 轴交点  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的纵坐标在  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 之间,根据图象判断以下结论:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 与抛物线  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的一个交点  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .其中正确的结论是(      )

 <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

A①②④    B①③④    C①②③    D①②③④

二、填空题

11.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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,自变量  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的取值范围是              

12.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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 上一点, ,,, <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 三点共线,请添加一个条件      ,使得  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .(只添一种情况即可)

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

13.将抛物线  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 向下平移5个单位长度后,经过点  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>       .

14.如图,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,则弦  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的长为        .

 <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

(第1题图)

15.已知一组正整数  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 有唯一众数8,中位数是5,则这一组数据的平均数为      

16.若分式方程  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的解为正整数,则整数  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的值为         

17.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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的面积是90,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 边的三等分点,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的值为            

18.如图,在正方形  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 延长线上一点,  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 分别交  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,分别交  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .下列四个结论:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .其中正确的结论是      

 <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

三、解答题

19.先化简,再求值:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,并从 ,,,, <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中选一个合适的数代入求值.

20.如图,某数学活动小组用高度为  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 米的测角仪  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,对垂直于地面  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的建筑物  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的高度进行测量,  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 处测得  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的仰角  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,然后将测角仪向建筑物方向水平移动6米至  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 处,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,测得  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的仰角  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的延长线交  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,求建筑物  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的高度(结果保留小数点后一位).(参考数据:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

21.某校为掌握学生对垃圾分类的了解情况,在全校范围内抽取部分学生进行调查问卷,并将收集到的信息进行整理,绘制成如图所示不完整的统计图,其中A为“非常了解”,B为“了解较多”,C为“基本了解”,D为“了解较少”.请你根据图中提供的信息,解答下列问题:

 <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

(1)本次调查共抽取了           名学生;

(2)补全条形统计图,并求出扇形统计图中“了解较少”所对应的圆心角度数;

(3)若全校共有1200名学生,请估计全校有多少名学生“非常了解”垃圾分类问题.

22.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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 为边向  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 外作有一个内角为  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的菱形  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,请用尺规和三角板作出图形,并直接写出  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的面积.

23.如图,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的图象与  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 轴交于  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 两点,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 轴交于点  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

(1)求该二次函数的解析式;

(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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是抛物线在第四象限图象上的任意一点,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的面积最大时,  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 边上的高  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的值为      

24.一条公路上依次有 ,, <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 三地,甲车从  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 地出发,沿公路经  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 地到  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 地,乙车从  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 地出发,沿公路驶向  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 地.甲、乙两车同时出发,匀速行驶,乙车比甲车早  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 小时到达目的地.甲、乙两车之间的路程  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 与两车行驶时间  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的函数关系如图所示,请结合图象信息,解答下列问题:

 <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

(1)甲车行驶的速度是           <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,并在图中括号内填上正确的数;

(2)求图中线段  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 所在直线的函数解析式(不要求写出自变量的取值范围);

(3)请直接写出两车出发多少小时,乙车距  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 地的路程是甲车距  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 地路程的3倍.

25.数学老师在课堂上给出了一个问题,让同学们探究.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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 上,将线段  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 绕点  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 顺时针旋转  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 得到线段  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

1)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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 在线段  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 上时,如图,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

分析问题:某同学在思考这道题时,想利用  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 构造全等三角形,便尝试着在  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 上截取  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,通过证明两个三角形全等,最终证出结论:

推理证明:写出图的证明过程:

探究问题:  

2)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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 在线段  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的延长线上时,如图: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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 在线段  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的延长线上时,如图,请判断并直接写出线段  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 之间的数量关系;

拓展思考:

3)在(1)(2)的条件下,若  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>       

26.牡丹江某县市作为猴头菇生产的“黄金地带”,年总产量占全国总产量的  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 以上,黑龙江省发布的“九珍十八品”名录将猴头菇列为首位.某商店准备在该地购进特级鲜品、特级干品两种猴头菇,购进鲜品猴头菇3箱、干品猴头菇2箱需420元,购进鲜品猴头菇4箱、干品猴头菇5箱需910元.请解答下列问题:

(1)特级鲜品猴头菇和特级干品猴头菇每箱的进价各是多少元?

(2)某商店计划同时购进特级鲜品猴头菇和特级干品猴头菇共80箱,特级鲜品猴头菇每箱售价定为50元,特级干品猴头菇每箱售价定为180元,全部销售后,获利不少于1560元,其中干品猴头菇不多于40箱,该商店有哪几种进货方案?

(3)在(2)的条件下,购进猴头菇全部售出,其中两种猴头菇各有1箱样品打aa为正整数)折售出,最终获利1577元,请直接写出商店的进货方案.

27.如图,在平面直角坐标系中,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 轴的正半轴交于点  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 轴的负半轴交于点  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 轴的正半轴上,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是平行四边形,线段  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的长是一元二次方程  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的一个根.请解答下列问题:

 <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

(1)求点  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的坐标;

(2)若线段  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的垂直平分线交直线  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 轴于点  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 在第一象限,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的值;

(3)在(2)的条件下,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 上,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 轴上是否存在点  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,使以 ,, <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 为顶点的三角形是直角边比为12的直角三角形?若存在,请直接写出  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的个数和其中两个点  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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.

参考答案

一、单选题

1. C

A、是轴对形,不是中心形,故此选项不符合意;

B、是轴对形,不是中心形,故此选项不符合意;

C、是轴对形,是中心形,故此选项符合意;

D、是轴对形,不是中心形,故此选项不符合.

故此答案C


2. D

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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,故该选项错误的;

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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,故该选项错误的;

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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,故该选项错误的;

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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,故该选项是正确的.

故此答案D


3. C

解:由主视图可知,左一列最高一,右一列最高三,由左视图可知,前一排最高三,后一排最高一,可知右第一排一定,可得几何体俯视图所示,

 <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

故此答案C


4. A

解:列表如下:



(甲,乙)

(甲,丙)

(甲,丁)

(乙,甲)


(乙,丙)

(乙,丁)

(丙,甲)

(丙,乙)


(丙,丁)

(丁,甲)

(丁,乙)

(丁,丙)


由列表可知,共有12种等可能的果,其中甲、乙两名同学同中的情况有2种,甲、乙两名同学同中的概率是  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

故此答案A


5. B

解: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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>   

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的内接四形,

 <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

故此答案B


6. C

解:每次降价的百分率  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,由意,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (舍去);

故此答案C


7. B

解:第1案有4个三角形,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

2案有7个三角形,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

3案有10个三角形,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

按此下去,第  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 案有  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 个三角形,

674案中三角形的个数  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (个).

故此答案B


8. 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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

矩形四 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

故此答案D.


9. B

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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

由折叠可得  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中,根据勾股定理可得  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

故此答案B


10. A

解:抛物线的解析式  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,故错误

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 相等,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (舍),  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,故正确,

故此答案A


二、填空题

11.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

解:根据意得  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>


12.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (答案不唯一)

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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

添加条件  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,可以使得  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

添加条件  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,可以使得  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (答案不唯一).


13. 2

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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 向下平移5度后得到  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 代入得到  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,整理得  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .故答案2.

【关

抛物线的平移:左加右减自量,上加下减常数.


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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .


15. 5

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 这组数据有唯一众数  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 中位数是  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 数据的平均数  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,故答案5


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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,化  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

去分母得  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,移合并得  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

由方程的解是正整数,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 正整数,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (舍去,会使得分式无意).


17. 13  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

解: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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的三等分点,  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的面90  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的三等分点,  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的面90  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>


18. ①②③⑤

解: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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

1,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 正确,故符合要求;

2,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 正确,故符合要求;

 <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,整理得  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 正确,故符合要求;

意知  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 不相似,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 错误,故不符合要求;

 <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

,, <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,同理得  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

同理得  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,整理得  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 正确,故符合要求;

故答案①②③⑤


三、解答题

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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 时,原式  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 或当  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 时,原式  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 或当  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 时,原式  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

20. 17.5

解:根据意可知四  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (米),

答:建筑物  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的高度约为  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 米.


21. (1)50 (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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,图形见详解 (3)480

1)解:次被调查的学生人数  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (名);

2了解对应心角度数  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (人),

形如下:

 <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

() <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (名),

全校有多少名学生非常了解垃圾分类问题480名.


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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的面积为1236.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 时,所作图形如图(1),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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,垂足为  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .在菱形  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 时,所作图形如图(2),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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,垂足为  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .在菱形  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> .综上,  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的面积为1236【易错警示】  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 为边向  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 外作有一个内角为  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的菱形  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 有两种情况:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ;  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,不要漏解.


23. (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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

1)解:把  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

二次函数的解析式  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

2)解:令  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的面最大  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>


24. (1)70300 (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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

1)解:由可知,甲  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的路程  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的速度是  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

2)解:由可知  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的坐别为  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

设线  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 所在直线的函数解析式  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 所在直线的函数解析式  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

3)解:由意知,  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 两地的距离  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

的速度  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 两地的距离  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 两地的距离  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,乙  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 地的路程是甲  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 地路程的3倍,

分两种情况,当甲乙相遇前

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

当甲乙相遇后  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

上可知,两  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,乙  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 地的路程是甲  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 地路程的3倍.


25. 1)见解析;(2)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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ;(31018

1明: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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 上截取  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是等三角形  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

2: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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的延长线  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 明如下:

所示,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 上取点  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 并延到点  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是等三角形,  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 顺时针  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 得到线  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是等三角形,  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

: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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的延长线  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 明如下:

所示,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 上取点  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是等三角形,  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 顺时针  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 得到线  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

3)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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

所示,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的延长线

 <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 矛盾,不符合意;

所示,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 的延长线

 <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

由(2)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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 18


26. (1)特级鲜品猴头菇每箱进价为40元,特级干品猴头菇每箱进价为150元;(2)3种方案,见解析;(3)特级干品猴头菇40箱,特级鲜品猴头菇40.

1)解:级鲜品猴菇和特干品猴菇每箱的价分x元和y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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

故特级鲜品猴菇每箱40元,特干品猴菇每箱150元;

2)解:商店购进级鲜品猴m箱,则购进干品猴  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 箱,

,, <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

商店有三种进货方案,

别为购进级鲜品猴40箱,则购进干品猴40箱;

购进级鲜品猴41箱,则购进干品猴39箱;

购进级鲜品猴42箱,则购进干品猴38箱;

3)解:当购进级鲜品猴40箱,则购进干品猴40

根据意得  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

购进级鲜品猴41箱,则购进干品猴39

根据意得  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (是小数,不符合要求);

购进级鲜品猴42箱,则购进干品猴38

根据意得  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (是小数,不符合要求).

故商店的进货方案是特干品猴40箱,特级鲜品猴40箱.


27. (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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> (3)存在,12个,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

1)解:解方程  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,即点  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 是平行四形,  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

∴ ≌ <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

3)如,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 个,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

由(2)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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 得坐标为  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 个,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> ,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 个,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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 重合,

故点  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 得坐标为  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a> 个,和点  <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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</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/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/973/" title="黑龙江省" class="c1" target="_blank">黑龙江省</a> <a href="/tags/979/" title="牡丹江" class="c1" target="_blank">牡丹江</a> <a href="/tags/1102/" title="黑龙江" class="c1" target="_blank">黑龙江</a>