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【327932】2024年江苏省宿迁市中考数学试题

时间:2025-01-20 20:44:26 作者: 字数:17373字
简介:

绝密★启用前

200626-2024年江苏省宿迁市中考数学试题


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

16的倒数是(      )

A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> C.−6D6

2.下列运算正确的是(      )

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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

3.地球与月球的平均距离大约为  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,数据384000用科学记数法表示为(      )

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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

4.如图,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 分别与直线  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 交于点EF,且  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 等于(      )

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

5.全国两会,习近平总书记在参加江苏代表团审议时指出,我们能不能如期全面建成社会主义现代化强国,关键看科技自立自强.将“科技、自立、自强”六个字分别写在某正方体的表面上,如图是它的一种表面展开图,在原正方体中,与“强”字所在面相对面上的汉字是(      )

 <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

A.自    B.立    C.科    D.技

6.我国古代问题:以绳测井,若将绳三折测之,绳多四尺:若将绳四折测之,绳多一尺.绳长、井深各几何?这段话的意思是:用绳子量井深,把绳三折来量,井外余绳四尺;把绳四折来量,井外余绳一尺.绳长、井深各几尺?若设绳长为x尺,则可列方程为(      )

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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

7.规定:对于任意实数abc,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,其中等式右面是通常的乘法和加法运算,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> .若关于x的方程 【】 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 有两个不相等的实数根,则m的取值范围为(      )

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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

8.如图,点A在双曲线  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 上,连接AO并延长,交双曲线  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 于点B,点Cx轴上一点,且  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的面积是6,则k的值为(      )

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

A2    B3    C4    D5

二、填空题

9.若代数式  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 有意义,则x的取值范围为         .

10.因式分解:  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>         

11.命题“两直线平行,同位角相等”的逆命题是                                     

12.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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 在第      象限.

13.一组数据6810x的平均数是9,则x的值为        

14.已知圆锥的底面半径为3,母线长为12,则其侧面展开扇形的圆心角的度数为        °

15.如图,已知正六边形  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的边长为2,以点E为圆心,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 长为半径作圆,则该圆被正六边形截得的  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

16.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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是高,以点A为圆心,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 长为半径画弧,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 于点E,再分别以BE为圆心,大于  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的长为半径画弧,两弧在  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的内部交于点F,作射线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>         

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

17.若关于xy的二元一次方程组  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的解是  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,则关于xy的方程组  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的解是        

18.如图,在平面直角坐标系中,点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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 上,且点A的横坐标为4,直角三角板的直角顶点C落在x轴上,一条直角边经过点A,另一条直角边与直线  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 交于点B,当点Cx轴上移动时,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的最小值为        

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

三、解答题

19.计算: π <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

20.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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,其中  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

21.如图,在四边形  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,且  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的中点.下面是甲、乙两名同学得到的结论:

 <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

甲:若连接  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,则四边形  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是菱形;

乙:若连接  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是直角三角形.

请选择一名同学的结论给予证明.

22.某校为丰富学生的课余生活,开展了多姿多彩的体育活动,开设了五种球类运动项目:A篮球,B足球,C排球,D羽毛球,E乒乓球.为了解学生最喜欢以上哪种球类运动项目,随机抽取部分学生进行调查(每位学生仅选一种),并绘制了统计图.某同学不小心将图中部分数据丢失,请结合统计图,完成下列问题:

 <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

(1)本次调查的样本容量是      ,扇形统计图中D对应圆心角的度数为        <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

(2)请通过计算,补全条形统计图;

(3)若该校共有2000名学生,请你估计该校最喜欢“E乒乓球”的学生人数.

23.某校组织七年级学生开展以“讲好红色故事,传承红色基因”为主题的研学活动,策划了四条研学线路供学生选择:A彭雪枫纪念馆,B淮海军政大礼堂,C爱园烈士陵园,D大王庄党性教育基地,每名学生只能任意选择一条线路.

(1)小刚选择线路A的概率为        

(2)请用画树状图或列表的方法,求小刚和小红选择同一线路的概率.

24.双塔是古黄河宿迁景观带的标志性建筑之一,由九层的九龙塔和七层的七凤塔构成.某校数学实践小组开展测量七凤塔高度的实践活动,该小组制定了测量方案,在实地测量后撰写活动报告,报告部分内容如下表,

测量七凤塔高度

测量工具

测角仪、皮尺等

活动形式

以小组为单位

测量示意图

测量步骤及结果

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

如图,步骤如下:

C处使用测角仪测得塔的顶部点B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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

沿着CA方向走到E处,用皮尺测得  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 米;

E处使用测角仪测得塔的顶部点B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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

已知测角仪的高度为1.2米,点CEA在同一水平直线上.根据以上信息,求塔  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的高度.

(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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

25.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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是直径,  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是弦,且  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的延长线上取一点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>   

(1)求证:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的切线;

(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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的长.

26.某商店购进AB两种纪念品,已知纪念品A的单价比纪念品B的单价高10元.用600元购进纪念品A的数量和用400元购进纪念品B的数量相同.

(1)求纪念品A,B的单价分别是多少元?

(2)商店计划购买纪念品A,B400件,且纪念品A的数量不少于纪念品B数量的2倍,若总费用不超过11000元,如何购买这两种纪念品使总费用最少?

27.如图,已知抛物线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> x轴交于两点  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 向右平移两个单位长度,得到抛物线  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,点P是抛物线  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 在第四象限内一点,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 并延长,交抛物线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 于点Q

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

(1)求抛物线  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的表达式;

(2)设点P的横坐标为  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,点Q的横坐标为  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的值;

(3)如图,若抛物线  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 交于点C,过点C作直线  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,分别交抛物线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 于点MNMN均不与点C重合),设点M的横坐标为m,点N的横坐标为n,试判断  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是否为定值.若是,直接写出这个定值;若不是,请说明理由.

28.在综合实践活动课上,同学们以折叠正方形纸片展开数学探究活动

【操作判断】

操作一:如图,对折正方形纸片  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,把纸片展平;

操作二:如图,在边  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 上选一点E,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 折叠,使点A落在正方形内部,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

操作三:如图,在边  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 上选一点F,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 折叠,使边  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 与边  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 把正方形纸片展平,得图,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的交点分别为GH

根据以上操作,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>           <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

【探究证明】

1)如图,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,试判断  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的形状并证明;

2)如图,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,过点G  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的垂线,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 于点PQM.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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

【深入研究】

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,请求出  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的值(用含k的代数式表示).

 <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

参考答案

一、单选题

1. 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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 6的倒数是  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> .故此答案B


2. B

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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 不是同类项,不能合并,该选项错误,不符合意;    

B.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 该选项正确,符合意;        

C.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 该选项错误,不符合意;                               

D.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 该选项错误,不符合意.    

故此答案B


3. B

解:384000用科学数法表示  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

故此答案B


4. C

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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> .故此答案C


5. C

解:将底面,折起来在前面,在右面,在后面,

字所在面相面上的字是

故此答案C


6. A

解:设绳长为x尺,列方程  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,故此答案A


7. D

解: 【】 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

关于x的方程 【】 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 有两个不相等的数根,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,且  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

故此答案D


8. C

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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

A在双曲线  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 上,点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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

故此答案C


二、填空题

9.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

解:代数式  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 有意

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> .


10.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>


11. 同位角相等,两直线平行

解:命两直线平行,同位角相等的逆命是同位角相等,两直线平行.


12.

解: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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的横坐  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 在第四象限.


13. 12

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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的平均数是9

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>


14.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

解:设侧面展开扇形的心角的度数  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 度,

面展开扇形的面积为 ππ <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>


15. π <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是正六形,

 <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ππ <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>


16.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

解:因  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

所以  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 平分  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,所以  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 高,所以  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

所以  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,

所以  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>


17.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,, <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

,, <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,, <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 有解,  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> .

方程的解集  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>


18.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 上,且点A的横坐标为4

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

当点Cx上移动时,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 关于  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 称,且  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> x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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

称性可知,  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 最短,C所在位置  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

称性可知,  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

经检验  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是方程的解,

 <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>


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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

π <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>


20.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>


21. 见详解

明:选择甲:如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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是菱形;

选择乙: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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是平行四形,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是菱形;

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是直角三角形.


22. (1)20090(2)见解析(3)估计该校最喜欢“  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 乒乓球”的学生人数为460名.

1)本次调查本容量是  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

扇形统计图  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 对应圆心角的度数  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 目的人数  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

全条形统计图如下:

 <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> (名  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

答:估计该校最喜  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 乒乓的学生人数460名.


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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> .

1)解:依意,共四条研学线路,每条线路被选择的可能性相同.

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 刚选择线A的概率  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

2)解:依意,列表可得.

A

B

C

D

A

AA

BA

CA

DA

B

AB

BB

CB

DB

C

AC

BC

CC

DC

D

AD

BD

CD

DD

由列表可得,共有16种等可能性果,其中相同线路的可能果有4种,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 和小红选择同一线路的概率  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>


24. 73.2.

解: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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 米,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 米,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 米,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> (米  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

答:塔  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的高度73.2米.


25. (1)见详解;(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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> .

1明:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>   

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 的切线

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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是直径,  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是弦,且  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>


26. (1)纪念品A,B的单价分别是  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 元和  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ;(2)A种纪念品购进  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 件,B种纪念品购进  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 件,两种纪念品使总费用最少.

1)解:A念品的  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 元,B念品的  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 元,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 经检验  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是原方程的解,

B念品的  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 元,

答:念品A,B价分  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 元和  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 元.

2)解:A念品购进  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 件,总费  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 元,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

,, <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ya的增大而增大,

 <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 购买这两种念品使总费用最少,

这时A念品购进  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 件,B念品购进  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 件,两种念品使总费用最少.


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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是定值,  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

1)解: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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> x交于两点  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

抛物线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 向右平移两个度,得到抛物线  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

2)解:P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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,把点A和点P的坐代入得到,  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> .

3)解:由(1)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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 立得到,  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,此  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> C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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

M的横坐标为m,且在  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 上,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

即点M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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,把点C和点M的坐代入得到,

 <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 立得到,  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

整理得到,  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>


28. [操作判断]45[探究证明]1)等腰直角三角形,理由见详解;(2)见详解;[深入研究]  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

[操作判断] 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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

意得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是正方形,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

[探究] 解:(1)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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是正方形,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是等腰直角三角形;

2)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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

由翻折得,  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是正方形,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

[深入研究] 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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> 是正方形,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a> ,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> <a href="/tags/987/" title="宿迁" class="c1" target="_blank">宿迁</a>