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【327934】2024年江苏省盐城市中考数学试题

时间:2025-01-20 20:44:57 作者: 字数:18275字
简介:

绝密★启用前

200828-2024年江苏省盐城市中考数学试题


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


题号

总分

得分






注意事项:

1.答题前填写好自己的姓名、班级、考号等信息

2.请将答案正确填写在答题卡上


一、单选题

1.有理数2024的相反数是(      )

A2024    B  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>     C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>     D  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

2.下列四幅图片中的主体事物,在现实运动中属于翻折的是(      )

A.工作中的雨刮器 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>     B.移动中的黑板 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

C.折叠中的纸片 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>     D.骑行中的自行车 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

3.下列运算正确的是(      )

A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>     B  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>     C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>     D  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

4.盐城是江苏省第一产粮大市.2023年全市小麦总产量约2400000吨,数据2400000用科学记数法表示为(      )

A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>     B  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>     C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>     D  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

5.正方体的每个面上都有一个汉字,如图是它的一种平面展开图,那么在原正方体中,与“盐”字所在面相对的面上的汉字是(      )

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

A.湿    B.地    C.之    D.都

6.小明将一块直角三角板摆放在直尺上,如图,若  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的度数为(      )

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> B  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> C  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> D  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

7.矩形相邻两边长分别为  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,设其面积为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,则  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 在哪两个连续整数之间(      )

A. 12B. 23C. 34D. 45

8.甲、乙两家公司  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 年的利润统计图如图,比较这两家公司的利润增长情况(      )

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

A. 甲始终比乙快B. 甲先比乙慢,后比乙快

C. 甲始终比乙慢D. 甲先比乙快,后比乙慢

二、填空题

9.若分式  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 有意义,则  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的取值范围是         

10.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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> +2  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> +1=        

11.两个相似多边形的相似比为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 则它们的周长的比为      

12.如图  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的内接三角形 ,, <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 连接  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>        ︒ .

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>   

13.已知圆锥的底面圆半径为4,母线长为5,则圆锥的侧面积是      

14.中国古代数学著作《增删算法统宗》中记载的“绳索量竿”问题,大意是:现有一根竿子和一条绳索,用绳索去量竿子,绳索比竿子长5尺;若将绳索对折去量竿子,绳索就比竿子短5尺,问绳索、竿子各有多长?该问题中的竿子长为       尺.

15.如图,小明用无人机测量教学楼的高度,将无人机垂直上升距地面  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 处,测得教学楼底端点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,再将无人机沿教学楼方向水平飞行  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 至点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 处,测得教学楼顶端点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,则教学楼  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的高度约为    <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .(精确到  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,参考数据:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

(第5题图)

16.如图,在  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的中点,连接  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,将  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 绕点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 旋转,得到  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .连接  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,当  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 时,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>                     .

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

三、解答题

17.计算:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

18.求不等式  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的正整数解.

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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 其中  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

20.在“重走建军路,致敬新四军”红色研学活动中,学校建议间学们利用周末时间自主到以下三个基地开展研学活动.

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .新四军纪念馆(主馆区);

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .新四军重建军部旧址(泰山庙):

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .新四军重建军部纪念塔(大铜马),

小明和小丽各自随机选择一个基地作为本次研学活动的第一站.

(1)小明选择基地  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的概率为       

(2)用画树状图或列表的方法,求小明和小丽选择相同基地的概率.

21.已知: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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 在同一条直线上 ,, <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

       ,则  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

请从  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 3个选项中选择一个作为条件(写序号),使结论成立,并说明理由.

22.小明在草稿纸上画了某反比例函数在第二象限内的图像,并把矩形直尺放在上面,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

请根据图中信息,求:

(1)反比例函数表达式;

(2)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 坐标.

23.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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 在以  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 上,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的切线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,垂足为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,连接  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

1) 求证:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

2) 若  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,求  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的半径.

24.阅读涵养心灵.某地区20239月就“初中生每天阅读时间”对七年级8000名学生进行了抽样调查(设每天阅读时间为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 调查问卷设置了四个时间选项: .< <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .< <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .< <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ),并根据调查结果制作了如图1所示的条形统计图.20239月该地区出台系列激励措施,力推学生阅读习惯养成.为了检测这些措施的效果,202312月该地区又对七年级学生进行了一次抽样调查,并根据调查结果制作了如图2所示的扇形统计图.

9月份学生每天阅读时间条形统计图

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

12月份学生每天阅读时间扇形统计图

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

请根据提供的信息,解答下列问题.

(1)20239月份抽样调查的样本容量为       ,该地区七年级学生“每天阅读时间不少于1小时”的人数约为       人;

(2)估算该地区202312月份“每天阅读时间不少于1小时”的七年级学生人数相对于9月份的增长率;(精确到  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

(3)根据两次调查结果,对该地区出台相关激励措施的做法进行评价.

25.如图1EFGH分别是平行四边形  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 各边的中点,连接  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 交于点M,连接AGCH交于点N,将四边形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 称为平行四边形  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的“中顶点四边形”.

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

(1)求证:中顶点四边形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 为平行四边形;

(2)如图2,连接  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 交于点O,可得MN两点都在  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 上,当平行四边形  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 满足        时,中顶点四边形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 是菱形;

如图3,已知矩形  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 为某平行四边形的中顶点四边形,请用无刻度的直尺和圆规作出该平行四边形.(保留作图痕迹,不写作法)

26.请根据以下素材,完成探究任务.

制定加工方案

生产背景

背景1

某民族服装厂安排70名工人加工一批夏季服装,有“风”“雅” “正”三种样式.

因工艺需要,每位工人每天可加工且只能加工“风”服装2件,或“雅”服装1件,或“正”服装1.

要求全厂每天加工“雅”服装至少10件,“正”服装总件数和 “风”服装相等

背景2

每天加工的服装都能销售出去,扣除各种成本,服装厂的获利情况为

风”服装:24/件;

正”服装:48/件;

雅”服装:当每天加工10件时,每件获利100元;如果每天多加工1件,那么平均每件获利将减少2

信息整理

现安排  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 名工人加工“雅”服装,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 名工人加工“风”服装,列表如下:

服装种类

加工人数 (人)

每人每天加工量(件)

平均每件获利(元)

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

2

24

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

1

 

 

1

48

探究任务

任务1.探寻变量关系

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 之间的数量关系

任务2.建立数学模型

设该工厂每天的总利润为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 元,求  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 关于  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的函数表达式

任务3.拟定加工方案

制定使每天总利润最大的加工方案

27.发现问题

小明买菠萝时发现,通常情况下,销售员都是先削去菠萝的皮,再斜着铲去菠萝的籽.

提出问题

销售员斜着铲去菠萝的籽,除了方便操作,是否还蕴含着什么数学道理呢?

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

分析问题

某菠萝可以近似看成圆柱体,若忽略籽的体积和铲去果肉的厚度与宽度,那么籽在侧面展开图上可以看成点,每个点表示不同的籽.该菠萝的籽在侧面展开图上呈交错规律排列,每行有n个籽,每列有k个籽,行上相邻两籽、列上相邻两籽的间距都为dnk均为正整数,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ),如图1所示.

小明设计了如下三种铲籽方案.

方案1:图2是横向铲籽示意图,每行铲的路径长为        ,共铲        行,则铲除全部籽的路径总长为        

方案2:图3是纵向铲籽示意图,则铲除全部籽的路径总长为        

方案3:图4是销售员斜着铲籽示意图,写出该方案铲除全部籽的路径总长.

解决问题

在三个方案中,哪种方案铲籽路径总长最短?请写出比较过程,并对销售员的操作方法进行评价.

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

参考答案

一、单选题

1. B

解:有理数2024的相反数是  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

故此答案B


2. C

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 、工作中的雨刮器,属于旋,不合意;

 <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 、移中的黑板,属于平移,不合意;

 <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 、折叠中的片,属于翻折,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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 行中的自行,属于平移,不合.

故此答案  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>


3. A

解:A  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 正确,符合意;

B  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 错误,不符合意;

D  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 错误,不符合.

故此答案A


4. D

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 故此答案D


5. C

解:由正方体表面展开的特征可得

面是面是湿面是

故此答案C


6. B

解:如

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .


7. C

意得矩形的面  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,即  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 34.C.


8. A

由折线统计图可知,甲公司  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 年利接近20万元,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 年利接近50万元,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 年利接近50万元,乙公司  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 年利10万元,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 年利20万元,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 年利10万元,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 甲始比乙快.A.


二、填空题

9.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

解:若分式  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 有意  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>


10. (  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> +1)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> +2  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> +1= (  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> +1)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>


11.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

解:两个相似多形的相似比  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

的周的比  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>


12. 50

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

    <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

    <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

    <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>


13. π <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

解:圆锥的底面半径4,母线长为5

圆锥 ππ <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>


14. 15

解:设绳  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>   尺,竿  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>   尺,

根据意得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>   

解得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>


15. 17

,延  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 交直线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,即  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,解得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .故答案17.

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>


16.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的中点,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 得到  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,符合条件的形有两种情况: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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的右侧时,如1)所示,作  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

由旋  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 是等腰直角三角形,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 中,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .

当点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的左侧时,2)所示,作  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,交  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 长线于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .可得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .故答案  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>


三、解答题

17.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .


18.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

解:去分母得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

去括号得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

合并同类项  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

系数化  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

不等式的正整数解  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

解:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,原式  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>


20. (1)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> (2)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

1)解:由意得,小明选择基地  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的概率  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

2)解:列表如下

 

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

共有9种等可能的果,其中小明和小丽选择到相同基地的果有3种,

小明和小丽选择相同基地的概率  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>


21. (答案不唯一),证明见解析

解:选择  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

选择  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> :无法  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 无法得出  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

选择  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>       <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .

故答案(答案不唯一)


22. (1)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> (2)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

1)解:由可知点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的坐标为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

反比例函数表达式  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 代入,得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 解得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

因此反比例函数表达式  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

2)解:如,作  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 于点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

可得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的坐标为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 矩形直尺对边平行  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>     <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 解得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 在第二象限  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>      <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 标为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>


23. 1) 【证明】连接  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,如图所示.    <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的切线,点  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 在以  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 上,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 2) 【解】  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> . 由(1)得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的半径为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .【思路分析】1)连接  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,根据题意得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,利用等量代换得到  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,再由相似三角形的判定即可证明.


24. (1)8007200(2)  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> (3)见解析

1)解:本容量  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

地区七年学生每天阅读时间不少于1的人数约为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ().

(), <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

12月份每天阅读时间不少于1的比例  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

9月份学生和12月份学生本均  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .

3地区出台相关激励措施有明的作用,督促大部分学生养成良好的阅读习惯


25. (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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 见解析.

1明:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

EFGH  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的中点,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 平行四形,

同理可得:四  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 平行四形,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 是平行四形;

2当平行四  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,中点四  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 是菱形,

由(1)得四  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 是平行四形,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

点四  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 是菱形

所示,即所求,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,作直线  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,交于点O,然后作  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> (或作BM=MN=ND),然后 、、、 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 即可,

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

MN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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的重心,符合意;

明: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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 平行四形;

、、、 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 交四于点EFGH所示:

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

矩形  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

由作  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

F  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的中点,

同理得:点E  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的中点,点G  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的中点,点H  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 的中点.


26. 任务1 【解】  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 安排  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 名工人加工“雅”服装,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 名工人加工“风”服装,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 加工“正”服装的有  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 名工人.  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 正”服装总件数和“风”服装相等,  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,整理得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 任务2 根据题意得“雅”服装每天获利(单位:元)为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,整理得  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 任务3 由任务2  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 时,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 取得最大值,此时  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,不符合题意,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 图象开口向下,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,当  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 时,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,不符合题意;当  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 时,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,符合题意,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ,可使每天总利润最大,此时  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> .综上,安排19名工人加工“雅”服装,17名工人加工“风”服装,34名工人加工“正”服装,即可使每天总利润最大.

27. 分析问题:方案1  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ;方案2  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ;方案3  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> ;解决问题:方案3路径最短,理由见解析

解:方案1:根据意每行有n个籽,行上相两籽的d

每行的路径长为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

每列有k个籽,呈交错规律排列,

相当于有  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 行,

除全部籽的路径总长为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

故答案  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

方案2:根据意每列有k个籽,列上相两籽的d

每列的路径长为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

每行有n个籽,呈交错规律排列,,

相当于有  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 列,

除全部籽的路径总长为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

方案3:由得斜着每两个点之的距离  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

根据意得一共有  <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/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 列,  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 行,

斜着相当于有n线,同  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a> 个,

除全部籽的路径总长为  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

解决问题

由上得:  <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

方案1的路径总长大于方案2的路径总长

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

 <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/55/" title="数学" class="c1" target="_blank">数学</a> <a href="/tags/558/" title="江苏" class="c1" target="_blank">江苏</a> <a href="/tags/559/" title="盐城" class="c1" target="_blank">盐城</a> <a href="/tags/744/" title="江苏省" class="c1" target="_blank">江苏省</a>

方案3籽路径总长最短,的操作方法是选择最短的路径,减少耗.