问题 阅读理解

Do you know the book called Cat Found? It’s written by Ingrid Lee. The book is about helping cats. Billy is a boy and he lives in a small town. There’re a lot of stray(流浪的) cats in it. People don’t like them and some naughty(淘气的) boys even throw rocks(石头) at them. One day Billy finds a little cat on the street. It is badly hurt. He is a kind boy and decides to take it home. His father doesn’t like the cat very much, so he puts it in his bedroom. He looks after the cat very well and it becomes healthy soon. Billy and his friends want to do something to tell people to help cats in many ways. Can they succeed(成功)?

根据短文内容判断正(T)误(F)。

小题1:You can find your lost cat at Cat Found. (  )

小题2:Billy wants to do something to tell people to help cats. (  )

小题3:Billy and his friends are very naughty. (  )

小题4:Billy’s father likes cats very much. (  )

小题5:There’re many stray cats in Billy’s hometown(家乡). (  )

答案

小题1:F

小题2:T

小题3:F

小题4:F

小题5:T

题目分析:短文大意:此文介绍了一本书,书中讲述了一个男孩救助一只小猫的故事,号召大家通过多种方式来帮助流浪猫。

小题1:细节考查题。根据文章首句可知Cat Found是一本书。

小题2: 细节考查题。从Billy and his friends want to do something to tell people to help cats in many ways. 一句中可知。

小题3:细节考查题。从He is a kind boy…一句中可知。

小题4:细节考查题。从His father doesn’t like the cat very much.一句中可知答案。

小题5:判断推理题。从文中的Billy is a boy and he lives in a small town. There’re a lot of stray cats in it.两句中可知。

问答题

为验证二氧化碳和氢氧化钠溶液确实能发生化学反应,两个化学兴趣小组的同学进行了如下探究活动.

(1)第一小组:小莉同学设计了如右图所示实验装置,集气瓶中充满二氧化碳气体,滴管中吸入了氢氧化钠溶液,集气瓶中的气球通过导气管与外界空气相通.

实验步骤实验现象实验结论
挤压滴管橡胶胶帽,使氢氧化钠溶液滴入集气瓶中.气球逐渐变大二氧化碳和氢氧化钠溶液确实发生了化学反应
同组的小华同学对此提出质疑,他将上述实验滴管中的氢氧化钠溶液换成等体积的水,然后

再重复完成实验,观察到现象是气球也变大但比小莉做的实验中的气球小.小华补充这一实

验的原因是______.

(2)第二小组:小秦同学对实验装置做了如右图改进.集气瓶中充满二氧化碳气体,气球通

过导气管与外界空气相通,分液漏斗A中装有氢氧化钠溶液.分液漏斗B中装有另一种试

剂.

步骤一:打开分液漏斗A的活塞,使氢氧化钠溶液流入集气瓶中.

现象:气球逐渐变大.

步骤二:打开分液漏斗B的活塞,使______溶液流入集气瓶中.

现象:______,产生这一现象的化学反应方程式是______.

结论:二氧化碳和氢氧化钠溶液可以反应,该反应的化学方程式是______.

(3)对于现象不明显的化学反应,上述两组同学的实验是分别从反应物和生成物两个方面进行的探究验证,其所利用的原理是不同的.

①第一组是通过实验证明______验证化学反应发生了;

②第二组是通过实验证明______验证化学反应发生了.

单项选择题