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【327915】2024年贵州省中考数学试题

时间:2025-01-20 20:40:32 作者: 字数:14762字
简介:

绝密★启用前

200733-2024年贵州省中考数学试题


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


题号

总分

得分






注意事项:

1.答题前填写好自己的姓名、班级、考号等信息

2.请将答案正确填写在答题卡上


一、单选题

1.下列有理数中最小的数是(      )

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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>     B0    C2    D4

2.“黔山秀水”写成下列字体,可以看作是轴对称图形的是(      )

A <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

3.计算  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的结果正确的是(      )

A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

4.不等式  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的解集在数轴上的表示,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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

5.一元二次方程  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的解是(      )

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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

6.为培养青少年的科学态度和科学思维,某校创建了“科技创新”社团.小红将“科”“技”“创”“新”写在如图所示的方格纸中,若建立平面直角坐标系,使“创”“新”的坐标分别为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,则“技”所在的象限为(      )

 <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

A. 第一象限B. 第二象限C. 第三象限D. 第四象限

7.为了解学生的阅读情况,某校在423日世界读书日,随机抽取100名学生进行阅读情况调查,每月阅读两本以上经典作品的有20名学生,估计该校800名学生中每月阅读经典作品两本以上的人数为(      )

A. 100B. 120C. 150D. 160

8.如图,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的对角线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 相交于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,则下列结论一定正确的是(      )

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

9.小星同学通过大量重复的定点投篮练习,用频率估计他投中的概率为  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,下列说法正确的是(      )

A. 小星定点投篮1次,不一定能投中

B. 小星定点投篮1次,一定可以投中

C. 小星定点投篮10次,一定投中4

D. 小星定点投篮4次,一定投中1

10.如图,在扇形纸扇中,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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

Aπ <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>     Bπ <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>     Cπ <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>     Dπ <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

11.小红学习了等式的性质后,在甲、乙两台天平的左右两边分别放入“■”“●”“▲”三种物体,如图所示,天平都保持平衡.若设“■”与“●”的质量分别为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,则下列关系式正确的是(      )

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

12.如图,二次函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的部分图像与  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 轴的一个交点的横坐标是  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,顶点坐标为  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,则下列说法正确的是(      )

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

A. 二次函数图像的对称轴是直线  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

B. 二次函数图像与  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 轴的另一个交点的横坐标是2

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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 时,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的增大而减小

D. 二次函数图像与  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 轴的交点的纵坐标是3

二、填空题

13.计算  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的结果是        

14.如图,在  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 中,以点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 为圆心,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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的长为半径画弧,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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

15.在元朝朱世杰所著的《算术启蒙》中,记载了一道题,大意是快马每天行240里,慢马每天行150里,慢马先行12天,则快马追上慢马需要的天数是  .

16.如图,在菱形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 中,点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的中点,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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

三、解答题

17.(1)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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 中任选3个代数式求和;

2)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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

18.已知点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 在反比例函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的图象上.

(1)求反比例函数的表达式;

(2)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 都在反比例函数的图象上,比较 ,, <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的大小,并说明理由.

19.如图,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,则点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的距离为(      )

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>   

A.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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的长度    B.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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的长度    C.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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的长度    D.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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的长度

20.如图,四边形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的对角线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 相交于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,有下列条件:

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>   

(1)请从以上①②中任选1个作为条件,求证: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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 是矩形;

(2)在(1)的条件下,若  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,求四边形  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的面积.

21.为增强学生的劳动意识,养成劳动的习惯和品质,某校组织学生参加劳动实践.经学校与劳动基地联系,计划组织学生参加种植甲、乙两种作物.如果种植3亩甲作物和2亩乙作物需要27名学生,种植2亩甲作物和2亩乙作物需要22名学生.

根据以上信息,解答下列问题:

(1)种植1亩甲作物和1亩乙作物分别需要多少名学生?

(2)种植甲、乙两种作物共10亩,所需学生人数不超过55人,至少种植甲作物多少亩?

22.综合与实践:小星学习解直角三角形知识后,结合光的折射规律进行了如下综合性学习.

【实验操作】

第一步:将长方体空水槽放置在水平桌面上,一束光线从水槽边沿  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 处投射到底部  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 处,入射光线与水槽内壁  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的夹角为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

第二步:向水槽注水,水面上升到  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 处时,停止注水.(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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 为法线,  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 为入射光线,  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 为折射光线.)

【测量数据】

如图,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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 在同一平面内,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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,折射角  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

【问题解决】

根据以上实验操作和测量的数据,解答下列问题:

(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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的长;

(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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 之间的距离(结果精确到0.1cm).

(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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

23.如图,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 为半圆  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的直径,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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 在半圆上,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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的延长线上,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 与半圆相切于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的延长线相交于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 相交于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

(1)写出图中一个与  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 相等的角:      

(2)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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的长.

24.某超市购入一批进价为10/盒的糖果进行销售,经市场调查发现:销售单价不低于进价时,日销售量y(盒)与销售单价x(元)是一次函数关系,下表是  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的几组对应值.

销售单价  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> /

12

14

16

18

20

销售量  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> /

56

52

48

44

40

(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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的函数表达式;

(2)糖果销售单价定为多少元时,所获日销售利润最大,最大利润是多少?

(3)若超市决定每销售一盒糖果向儿童福利院赠送一件价值为  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 元的礼品,赠送礼品后,为确保该种糖果日销售获得的最大利润为392元,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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的值.

25.综合与探究:如图,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,点P  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的平分线上,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 于点A

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

(1)【操作判断】

如图,过点P  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 于点C,根据题意在图中画出  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,图中  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的度数为      度;

(2)【问题探究】

如图,点M在线段  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 上,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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,过点P  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 交射线  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 于点N,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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

(3)【拓展延伸】

M在射线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 上,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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,过点P  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 交射线  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 于点N,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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 与射线  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 相交于点F,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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的值.

参考答案

一、单选题

1. 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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

最小的数是  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

故此答案A


2. B

解:A.不是轴对形,不符合意;

B 轴对形,符合意;

C 不是轴对形,不符合意;

D 不是轴对形,不符合.

故此答案B


3. 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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,故此答案A


4. C

不等式  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的解集在数上的表示如下.

 <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

故此答案C


5. 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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

故此答案B


6. A

根据意建立平面直角坐系如所示,在第一象限,故A.

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>


7. 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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> (人),故D.


8. 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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,故B.


9. A

小星同学通大量重复的定点投篮练习,用率估他投中的概率  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 由概率的定可知,小星定点投1次,不一定能投中,故A正确,B错误;小星定点投10次,不一定投中4次,故C错误;小星定点投4次,不一定投中1次,故D错误.A.


10. 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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 长为 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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

故此答案C


11. 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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,由甲可得  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

由乙可得  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

故此答案C


12. 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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 二次函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 像的点坐标为  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 二次函数像的是直线  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,故A错误  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 二次函数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 像与  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的一个交点的横坐  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 是直线  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 二次函数像与  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的另一个交点的横坐1,故B错误  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 抛物线开口向下,是直线  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的增大而增大,故C错误二次函数表达式  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,当  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 二次函数像与  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的交点的3,故D正确,故D.


二、填空题

13.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

解: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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>


14. 5

由作可知,  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>


15. 20

追上慢需要  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> .故答案20.


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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 交于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

在菱形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 中,点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 点作  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 点,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>


三、解答题

17. 1)见解析; (), <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

1)解:选择①②③

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

选择①②④

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

选择①③④

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

选择②③④

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> .

2)解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>


18. (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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,理由见解析

1)解:把  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

反比例函数的表达式  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

2)解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

函数象位于第一、三象限,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 都在反比例函数的象上,  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>


19. 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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的距离线  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 度.

故此答案C


20. (1)见解析(2)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

1选择

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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 是矩形;

选择

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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 是矩形;

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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

矩形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的面积为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>


21. (1)种植1亩甲作物和1亩乙作物分别需要5名学生和6名学生;(2)至少种植甲作物5

1)解:种植1甲作物和1乙作物分需要  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 名学生,

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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

答:种植1甲作物和1乙作物分需要5名学生和6名学生;

2)解:种植甲作物  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 种植乙作物  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

答:至少种植甲作物5


22. (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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

1)解: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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> .

2)解:由可知  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>


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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> (答案不唯一);(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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

1)解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> (答案不唯一);

2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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 是切线

 <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

3)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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> (舍去),

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>


24. (1)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> (2)糖果销售单价定为25元时,所获日销售利润最大,最大利润是450元;(3)2

1)解  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的函数表达式  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的函数表达式  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

2)解:售利润为  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 元,

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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 有最大值为450

糖果价定25,所售利最大,最大利450元;

3)解:售利润为  <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 元,

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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 有最大值为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

糖果日得的最大利润为392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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> (舍去),

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 值为2


25. (1)画图见解析,90(2)见解析(3)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

1)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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 所求,

 <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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 是矩形,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

故答案90

2明:P  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

由(1)知:四  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 是矩形,

P  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的平分线上,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

矩形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

∴ ≌ <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

3)解:M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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> ,如,延  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 相交于点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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

由(2)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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

∴ ≌ <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

M  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 的延长线,如P  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> C,并延  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

由(2)知:四  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

∴ ≌ <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a> 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/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/551/" title="贵州" class="c1" target="_blank">贵州</a> <a href="/tags/1022/" title="贵州省" class="c1" target="_blank">贵州省</a>