试题与答案

在用打点计时器研究匀变速直线运动规律的实验中每隔0.02s打一个点,每隔5个连续

题型:实验题

题目:

在用打点计时器研究匀变速直线运动规律的实验中每隔0.02s打一个点,每隔5个连续点取一个计数点,计数点A、B、C、D、E的位置如图所示,则物体运动的加速度为___________m/s2,C点时刻的速度为                m/s。

答案:

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参考答案:D解析: 需求分析是软件定义时期的最后一个阶段,它的基本任务就是详细调查现实世界要处理的对象,充分了解原系统的工作概况,明确用户的各种需求,然后在这些基础上确定新系统的功能。

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题型:阅读理解

There are about fifteen hundred languages in the world。But only a few of them are very important.English is one of these.Many people use it,not only in England and the USA,but also in other parts of the world.About 200,000,000 people speak it as their own language.It is difficult to say how many peopie are learning it as a foreign language.Many millions of people are trying to do so.Is it easy or difficult to learn English?Different people may have different answers.Have you ever noticed ads(广告)of this kind in the newspapers or magazines?“Learn English in six weeks,or give your money back…”,“easy and funny…”,“Our records and tapes help you master English in a month”.Of course,it never happened quite like this.

The only language that seems easy to learn is t11e mother tongue.We should remember that

we all learned our own language well when we were children.If we could 1ea m English in the

same way,it would not seem so difficult.Think of what a small child does.He 1istens lo what people say.He tries what he hears.

So,it is hard to say that learning English is easy.We must do a Iot ofpractice.And practice needs great effort and takes much time.Good teachers,records,tapes,books,and dictionaries will be helpful,but they cannot do the student’s work for him.

小题1:How many languages are very important in the world?

A.A few.

B.Few.

C.About 1,500.

D.Many.小题2:How does the writer like the ads in the newspapers or magazines?

A.He thinks the ads very expensive.

B.He thinks the ads are true.

C.It never happened quite like what the ads said.

D.He believes“Learn English in six weeks,or give your money back.”小题3:Which language is easy to learn?

A.English.

B.Chinese.

C.Japanese

D.The mother language.

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