当前位置:首页 > 八年级 > 数学试卷

【330517】第4章测试题及答案

时间:2025-02-09 11:36:15 作者: 字数:9439字

湘教版八下数学第4章一次函数测试题及答案

一、选择题(共12小题;共36分)

1. 一辆汽车以平均速度  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 千米/时的速度在公路上行驶,则它所走的路程  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> (千米)与所用的时间  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> (时)的关系表达式为 ( )

A.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> B.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> C.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> D.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

2. 一次函数  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的图象经过的象限是 ( )

A. 一,二,三 B. 二,三,四 C. 一,二,四 D. 一,三,四

3. 正比例函数  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的取值是 ( )

A.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> B.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> C.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> D.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

4. 函数  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 中自变量  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的取值范围是  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

A.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> B.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

C.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> D.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

5. 下列说法正确的是 ( )

A. 常量是指永远不变的量

B. 具体的数一定是常量

C. 字母一定表示变量

D. 球的体积公式  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 中,变量是  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

6. 如图所示,函数  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的图象相交于  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 两点.当  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 时, <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的取值范围是 ( ) <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

A.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> B.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

C.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> D.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

7. 如图,已知一条直线经过点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 、点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> ,将这条直线向左平移与  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 轴、  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 轴分别交于点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 、点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> .若  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> ,则直线  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的函数解析式为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

A.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> B.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

C.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> D.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

8. 一家游泳馆的游泳收费标准为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> /次,若购买会员年卡,可享受如下优惠:

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

例如,购买  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 类会员卡,一年内游泳  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 次,消费  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 元,若一年内在该游泳馆游泳的次数介于  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 次之间,则最省钱的方式为 ( )

A. 购买  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 类会员年卡 B. 购买  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 类会员年卡

C. 购买  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 类会员年卡 D. 不购买会员年卡

9. 如图,点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的坐标为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> ,点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 在直线  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 上运动,当线段  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 最短时,点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的坐标为 ( ) <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

A.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> B.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

C.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> D.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

10. 在平面直角坐标系中, <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 为坐标原点,点A的坐标为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 轴上一点,且使得  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 为等腰三角形,则满足条件的点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的个数为 ( )

A.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> B.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> C.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> D.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

11. 如图,在矩形  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 中, <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 交于点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> .点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 为线段  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 上的一个动点,连接  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> ,过  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> ,设  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> ,图  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 中某条线段的长为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> ,若表示  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的函数关系的图象大致如图  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 所示,则这条线段可能是图  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 中的  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

A. 线段  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> B. 线段  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> C. 线段  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> D. 线段  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

12. 如图,等边三角形  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的边长为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的三等分点,三角形边上的动点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 从点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 出发,沿  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的方向运动,到达点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 时停止.设点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 运动的路程为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> ,则  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 关于  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的函数图象大致为 ( ) <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

A.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> B.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

C.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> D.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

二、填空题(共6小题;共18分)

13. 在函数  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 中,自变量  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的取值范围是  

14. 如图,购买一种苹果,所付款金额  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> (单位:元)与购买量  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> (单位:千克)之间的函数图象由线段  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 和射线  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 组成,则一次购买  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 千克这种苹果比分三次每次购买  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 千克这种苹果可节省   元.

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

15.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>   时,函数  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 是一个一次函数.

16. 在平面直角坐标系中,点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的坐标分别是  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> .若线段  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 与直线  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 相交,则  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的取值范围为  

17. 把直线  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 沿  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 轴向右平移  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 个单位,所得直线的函数解析式为  

18. 如图 1,在正方形  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 中,点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 沿边  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 从点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 开始向点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的速度移动;同时,点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 沿边  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 从点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 开始向点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的速度移动.当点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 移动到点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 时, <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 同时停止移动.设点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 出发  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 时, <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的面积为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的函数图象如图 2所示,则线段  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 所在的直线对应的函数关系式为  

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

三、解答题(共7小题;共66分)

19. 求下列函数中的自变量的取值范围:

1  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

2  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

3  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

4  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>



20. 甲、乙两地相距  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> ,小明骑自行车以  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的速度从甲地驶往乙地.写出小明离乙地的距离  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> )与行驶时间  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> )之间的关系式.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 是否为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的一次函数?是否为正比例函数?




21. 在如图所示的三个函数图象中,有两个函数图象能近似地刻画如下  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 两个情境:情境  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> :小芳离开家不久,发现把作业本忘在家里,于是返回家里找到了作业本再去学校;情境  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> :小芳从家出发,走了一段路程后,为了赶时间,以更快的速度前进.

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

1 情境  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 所对应的函数图象分别为    (填写序号);

2 请你为剩下的函数图象写出一个适合的情境.



22. 在标准大气压下,烧开水时,水温达到  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 就会沸腾,下表是某同学做“观察水的沸腾”实验时记录的数据:

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

1 上表反映了哪两个量之间的关系?

2 水的温度是如何随着时间的变化而变化的?

3 时间推移  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 分钟,水的温度如何变化?

4 时间为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 分钟时,水的温度为多少?你能得出时间为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 分钟时,水的温度吗?

5 根据表格,你认为时间为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 分钟和  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 分钟时水的温度分别为多少?

6 为了节约能源,你认为应在什么时间停止烧水?







23. 甲、乙两辆汽车分别从 AB 两地同时出发,沿同一公路相向而行.乙车出发  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 后休息,与甲车相遇后,继续行驶.设甲、乙两车与 B 地的路程分别为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> ,甲车行驶的时间为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 之间的函数图象如图所示,结合图象解答下列问题:

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

1 乙车休息了    <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

2 求乙车与甲车相遇后  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的函数解析式,并写出自变量  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的取值范围;

3 当两车相距  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 时,直接写出  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的值.



24. 如图,在平面直角坐标系  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 中,一次函数  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的图象经过点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> ,且与正比例函数  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的图象交于点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

1  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的值及一次函数  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的解析式;

2 若一次函数  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的图象与  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 轴交于点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> ,且正比例函数  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的图象向下平移  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 个单位长度后经过点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> ,求  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的值;

3 直接写出关于  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的不等式  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的解集.



25. 如图,在平面直角坐标系  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 中,直线  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 轴, <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 轴分别交于点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> ,点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> ,点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 轴的负半轴上.若将  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 沿直线  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 折叠,点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 恰好落在  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 轴正半轴上,落点记为点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

1  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的长和点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的坐标;

2 求直线  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 所对应的函数表达式.


答案

第一部分

1. D 2. C 3. C 4. A 5. B

6. D 7. D 8. C 9. C 10. B

11. B 12. B

第二部分

13.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

14.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

15.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

16.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

17.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

18.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>


第三部分

19. 1 全体实数

2  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

3  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

4  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

20.  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的一次函数, <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 不是  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 正比例函数.

21. 1) ③;①

2 小华从家出发去书店看了一会书又返回家中.

22. 1 上表反映了水的温度与时间的关系;

2 水的温度随着时间的增加而增加,到  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 时恒定.

3 时间推移  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 分钟,水的温度增加  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 度,到  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 分钟时恒定.

4 时间为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 分钟时,水的温度是  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> ,时间为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 分钟时,水的温度约为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

5 根据表格,时间为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 分钟和  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 分钟时水的温度均为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

6 为了节约能源,应在  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 分钟后停止烧水.

23. 1  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

2  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的函数解析式为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 图象过  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> ,则

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

解得

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>



3  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>



24. 1  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 直线  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 经过点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

解得  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 直线  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 经过点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 和点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

解得  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 直线  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的解析式为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

2  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 时, <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> ,解得  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的坐标为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

设平移后的直线的解析式为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 平移后的直线经过点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

解得  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

3  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

25. 1 根据题意得  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 中, <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 沿直线  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 折叠后的对应三角形为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 轴的正半轴上.

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的坐标为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

2 设点  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的坐标为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

由题意可知  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

由勾股定理得  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

解得  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 的坐标为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

可设直线  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 所对应的函数表达式为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 在直线  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 上,

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

解得  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>

 <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 直线  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a> 所对应的函数表达式为  <a href="/tags/4/" title="测试" class="c1" target="_blank">测试</a> <a href="/tags/46/" title="答案" class="c1" target="_blank">答案</a> <a href="/tags/51/" title="试题" class="c1" target="_blank">试题</a>