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【327939】2024年内蒙古兴安盟呼伦贝尔中考数学试题

时间:2025-01-20 20:45:07 作者: 字数:16828字
简介:

绝密★启用前

200675-2024年内蒙古兴安盟、呼伦贝尔中考数学试题


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  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的绝对值是(      )

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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>     B10    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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

2.下列计算正确的是(      )

A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

3.如图是由七个完全相同的小正方体组成的立体图形,选项给出的四个平面图形中不属于其三视图的是(      )

 <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

4.新时代十年来,我国建成世界上规模最大的社会保障体系,其中基本医疗保险的参保人数由  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 亿增加到  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 亿,参保率稳定在  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> .将数据  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 亿用科学记数法表示为(      )

A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

5.下列说法正确的是(      )

A.任意画一个三角形,其内角和是  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 是必然事件

B.调查某批次汽车的抗撞击能力,适宜全面调查.

C.一组数据246x7469的众数是4,则这组数据的中位数是4

D.在一次芭蕾舞比赛中,甲、乙两个芭蕾舞团都表演了舞剧《天鹅湖》,两团女演员的身高平均数相同,方差分别为 甲乙 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,则甲芭蕾舞团的女演员身高更整齐

6.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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的内接四边形.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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的度数是        

 <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

7.实数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 在数轴上的对应位置如图所示,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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的化简结果是(      )

 <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

A2B  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> D-2

8.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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 在直线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 上,坐标  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 是二元一次方程  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的解,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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的位置在(      )

A.第一象限B.第二象限C.第三象限D.第四象限

9.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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 为圆心,适当长为半径画弧分别交  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 和点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,再分别以点  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 为圆心,大于  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的长为半径画弧,两弧交于点  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 并延长交  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的面积为8,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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的面积是(      )

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

A8B16C12D24

10AB两种机器人都被用来搬运化工原料,A型机器人比B型机器人每小时多搬运30千克,A型机器人搬运900千克所用时间与B型机器人搬运600千克所用时间相等 ., <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 两种机器人每小时分别搬运多少千克化工原料?(      )

A. 6030B. 90120C. 6090D. 9060

11.如图,边长为2的正方形  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 边上一点,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 上一点,连接  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 关于直线  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 对称,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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的周长是(      )

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

12.已知某同学家、体育场、图书馆在同一条直线上.下面的图象反映的过程是:该同学从家跑步去体育场,在那里锻炼了一阵后又步行回家吃早餐,饭后骑自行车到图书馆.图中用x表示时间,y表示该同学离家的距离.结合图象给出下列结论:

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>   

1)体育场离该同学家2.5千米;

2)该同学在体育场锻炼了15分钟;

3)该同学跑步的平均速度是步行平均速度的2倍;

4)若该同学骑行的平均速度是跑步平均速度的1.5倍,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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的值是3.75

其中正确结论的个数是(      )

A1    B2    C3    D4

二、填空题

13.分解因式: ++= <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>       

14.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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,将线段  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 平移得到线段  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的坐标是            

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

15.为了促进城乡协调发展,实现共同富裕,某乡镇计划修建公路.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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 是公路弯道的外、内边线,它们有共同的圆心O,所对的圆心角都是  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,点ACO在同一条直线上,公路弯道外侧边线比内侧边线多36米,则公路宽  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的长是    米.( π <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 3.14,计算结果精确到0.1

 <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

16.对于实数  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 定义运算“※”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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,例如  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,则关于  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的不等式  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 有且只有一个正整数解时,  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的取值范围是    

17.如图,在平面直角坐标系中,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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,过点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 轴交  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 轴于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 为线段  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 上的一点,且  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> .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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的图象经过点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 交线段  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,则四边形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的面积是     

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

三、解答题

18.计算: π <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

19.先化简,再求值:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

20.综合实践活动中,数学兴趣小组利用无人机测量大楼的高度.如图,无人机在离地面40米的  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 处,测得操控者  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的俯角为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,测得楼  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 楼顶  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 处的俯角为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,又经过人工测量得到操控者  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 和大楼  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 之间的水平距离是80米,则楼  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的高度是多少米?(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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 都在同一平面内,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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

21.从一副普通的扑克牌中取出五张牌,它们的牌面数字分别是44556

(1)将这五张扑克牌背面朝上,洗匀后从中随机抽取一张,则抽取的这张牌的牌面数字是4的概率是多少?

(2)将这五张扑克牌背面朝上,洗匀后从中随机抽取一张(不放回),再从中随机抽取第二张.请用列表或画树状图的方法,求抽取的这两张牌的牌面数字之和为奇数的概率.

22.如图,在平行四边形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 在边  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的延长线交边  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

(1)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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 是菱形:

(2)若平行四边形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的周长为  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的长.

23.某市某校组织本校学生参加“市志愿者服务”活动,其服务项目有“清洁卫生”“敬老服务”“文明宣传”“交通劝导”,每名参加志愿者服务的学生只参加其中一项.为了解各项目参与情况,该校随机调查了部分参加志愿者服务的学生,将调查结果绘制成如下两幅不完整的统计图.

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

根据统计图信息,解答下列问题:

(1)本次调查的学生共有      人,请补全条形统计图;

(2)在扇形统计图中,求“敬老服务”对应的圆心角的度数;

(3)该校共有2000名学生,若有  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的学生参加志愿者服务,请你估计参加“文明宣传”项目的学生人数.

24.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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 中,以  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 为直径的  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,垂足为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的两条弦  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

(1)求证:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的切线;

(2)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,求扇形  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的面积.

25.某超市从某水果种植基地购进甲、乙两种优质水果,经调查,这两种水果的进价和售价如表所示:

水果种类

进价(元/千克)

售价(元/千克)

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

22

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

25

该超市购进甲种水果18千克和乙种水果6千克需366元:购进甲种水果30千克和乙种水果15千克需705元.

(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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的值;

(2)该超市决定每天购进甲、乙两种水果共150千克进行销售,其中甲种水果的数量不少于50千克,且不大于120千克.实际销售时,若甲种水果超过80千克,则超过部分按每千克降价5元销售.求超市当天销售完这两种水果获得的利润  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> (元)与购进甲种水果的数量  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> (千克)之间的函数关系式(写出自变量  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的取值范围),并求出在获得最大利润时,超市的进货方案以及最大利润.

26.如图,在平面直角坐标系中,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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的图象经过原点和点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,经过点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的直线与该二次函数图象交于点  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 轴交于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

(1)求二次函数的解析式及点  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的坐标;

(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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 是二次函数图象上的一个动点,当点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 在直线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 上方时,过点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 轴于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,与直线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,设点  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的横坐标为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 为何值时线段  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的长度最大,并求出最大值;

是否存在点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,使得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 相似.若存在,请求出点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 坐标;若不存在,请说明理由.

参考答案

一、单选题

1. A

解:因  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 为负数,所以  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 绝对值为  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

故此答案 A


2. D

解:A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,原错误,不符合意;

B  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,原错误,不符合意;

C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,原错误,不符合意;

D  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,原算正确,符合.

故此答案D


3. C

A项为视图B项为视图C不属于三视图D项为视图

故此答案C


4. C

解: 亿 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

故此答案C


5. D

A.任意画一个三角形,其内角和是  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 是不可能事件,故原错误

B调查某批次汽的抗撞能力,适宜抽样调查.故原错误

C.一数据246x7469的众数是4则这组数据的中位数是5,故原错误

D.在一次芭蕾舞比中,甲、乙两个芭蕾舞都表演了舞《天湖》,两女演的身高平均数相同,方差分别为 甲乙 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 甲芭蕾舞的女演身高更整,故正确,

故此答案D


6. 130°

解:ABCDO的内接四形,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,又  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>


7. A

由数  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

故此答案A


8. D

立方程  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的坐标为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 在第四象限,故此答案D


9. B

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

由作知:  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 平分  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的面积为8  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的面  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

故此答案B


10. D

B型机器人每小搬运  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 千克化工原料,A型机器人每小搬运  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 千克化工原料.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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 经检验  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 是原方程的解且符合意,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> .D


11. A

解:正方形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 边长为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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 关于直线  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 称,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的周  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

故此答案A


12. C

解:由象可知,体育同学家2.5千米,故(1)正确;

同学在体育场锻炼  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> (分),故(2)正确;

同学的跑步速度  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> (千米/),步行速度  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> (千米/),跑步速度是步行速度的  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 倍,故(3错误

同学行的平均速度是跑步平均速度的1.5倍,则该同学行的平均速度  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> (千米/),所以  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,故(4)正确,

故此答案C


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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>


14.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

由平移性可知  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 在第四象限,

 <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> .

【知】平移的性:平移前后对应边平行(或在同一条直线上)且相等,对应角相等.


15.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

解:根据意,得 π <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> π <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

公路弯道外侧边线比内侧边线36米,

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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

π <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,即 π <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

解得 π <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>


16.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

解:根据意可知,  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 有且只有一个正整数解,

①② <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

解不等式,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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

解不等式,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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>


17.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

,作  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,作  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的坐别为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

反比例函数解析式  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 与点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 相等,且  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 在反比例函数象上,

 <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

形梯形 <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>


三、解答题

18.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

解: π <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>


19.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>


20.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的高度为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 米.

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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

意知  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的高度  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 米.


21. (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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

1)解:将扑克牌背面朝上,洗匀,从中随机抽取一,抽取牌面数字是4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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

2)解:画,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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

共有20种等可能事件,其中抽取的牌的牌面数字之和奇数有12种,

所以抽取的牌的牌面数字之和奇数的概率  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>


22. (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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

1明:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 是菱形;

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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

平行四  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的周长为22

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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的周长为  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 是菱形,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 是等三角形,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>


23. (1)200,画图见解析 (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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> (3)360

1)解:本次调查的学生共有  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 人,

文明宣的人数有  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 人,

补图如下:

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

故答案200

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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

∴“敬老服对应心角的度数是  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

参加文明宣目的学生人数360人.


24. (1)见解析 (2) π <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

1明:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的半径;  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的切线

2)解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,又  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 是等三角形,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

扇形  <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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的面积为 ππ <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>


25. (1)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,购进甲种水果80千克,乙种水果70千克,最大利润为1060

1)解:根据意得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

2)解:当  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的增大而增大,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 有最大,最大值为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

购进甲种水果80千克,乙种水果70千克,最大利润为1060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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的增大而减小,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 有最大,最大值为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

购进甲种水果80千克,乙种水果70千克,最大利润为1060元;

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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 购进甲种水果80千克,乙种水果70千克,最大利润为1060元.


26. (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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的坐标为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 相似

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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

二次函数的解析式  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 解析式  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 解析式  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,如

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 标为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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的坐标为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> ,如  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的坐标为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>

上,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/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 的坐标为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/1060/" title="内蒙古" class="c1" target="_blank">内蒙古</a> <a href="/tags/1131/" title="兴安" class="c1" target="_blank">兴安</a> 相似.