试题与答案

阅读理解。 Thomas Edison was a famous Americ

题型:阅读理解

题目:

阅读理解。

     Thomas Edison was a famous American scientist. He was born in 1847. When he was a child, he liked

  to find out how things worked. He was in school for only three months. He asked his teacher a lot of

  strange questions, Most of them had nothing to do with his lessons. The teacher thought the boy was

 not bright and was not worth (值) teaching. When he told this to Edison's mother, she took her son out of

  school. As she had been a teacher, she taught him herself. The boy read a lot. Soon he became very

  interested in science. At the age of ten, Edison had already built a chemistry lab (实验室) for himself.

 Ever since then, he never stopped searching (探索) for new and better ways to do things.

1. Edison was born in the _____  century ( 世纪).

    A. eighteenth    

    B. nineteenth  

    C. nineteen      

    D. eighteen      

2. While he was in school, Edison _____  .

    A. studied his lesson very hard  

    B. was often late for school

    C. liked to ask questions      

    D. was not bright and enough to study

3. Edison learned more from _____  .

    A. his mother    

    B. his teacher  

    C. other boys    

    D. his father

4. Young Edison was interested in _____  .

    A. sports    

    B. playing games  

    C. making trouble  

    D. science

5. He was always searching for new and better ways to do things after he _____  .

    A. read books                    

    B. finished school  

    C. built a lab                    

    D. was taken out of school

答案:

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(1)准备的实验器材有:铁架台、3个质量不同的小球、可选择速度的弹射器和天平、计时器等.

(2)把弹射器水平固定在铁架台上,先将一个10g的小球放入弹射器进行弹射,如图所示,并把小球下

实验

序号

小球质量(g)小球抛出的

速度(m/s)

小球下落的

高度(m)

小球的落地

时间(s)

1100.51.50.55
2101.01.00.45
3101.01.50.55
4101.02.00.64
5101.51.50.55
6201.01.00.45
7301.01.00.45
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(3)改变小球的质量、抛出的速度和下落的高度,重复下面的实验,得出了下表的数据问:

①除上述器材外,本次实验还需要的测量器材是______.

②通过分析表中的1、3、5次数据,可以得出:同一小球在______相同时,落地时间与______无关.

③通过分析表中第______次的实验数据,可以得出:小球抛出速度和下落高度相同时,落地时间与小球的质量______(选填“有关”或“无关”)

④综合分析上表中的数据,可以得到结论:水平抛出的小球落地时间与______有关.

⑤请你判断:某部队军事演习时,两架轰炸机在距地面相同高度,以不同的速度水平向前飞行,同时对目标投放炸弹,则下落的炸弹______(选填“是”或“不是”)同时落地(不计空气阻力).

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