试题与答案

已知地球半径为R,地球表面重力加速度为g,不考虑地球自转的影响。 (1)推导第一

题型:计算题

题目:

已知地球半径为R,地球表面重力加速度为g,不考虑地球自转的影响。

(1)推导第一宇宙速度v1的表达式;

(2)若卫星绕地球做匀速圆周运动,运行轨道距离地面高度为h,求卫星的运行周期T。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:对解析:封闭式基金的期限是指基金的存续期,即基金从成立起到终止之间的时间。决定基金期限长短的因素主要有两个:①基金本身投资期限的长短。②宏观经济形势。

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题型:阅读理解

阅读理解。

    At school many things happen to us. We may feel excited when we have success in a school play. We

may feel sorry if we lose an important game. We want to keep the memory for the rest of our lives.

    How to keep the memory? Our English teacher, Miss Wang, has taught us a good way of remembering

things to make our own yearbook. What is a yearbook? A yearbook is a kind of book which is used to keep

the memory of exciting moments. It's usually made at the end of the year.

    Last December, we began to make our yearbook. First we chose the persons who had done something

special, then some students interviewed (采访) them, some wrote down their stories, others took photos

of them. Everyone in our class had something to do. Finally our teacher helped us to put the things together.

We had our first yearbook.

    All of us put a lot of love into making the yearbook. It is so wonderful that not only the students but also

our parents and teachers will remember the special time for ever.

1. When we have success in a school play, we may feel ______. [ ]

A. sorry

B. angry

C. excited

D. interested

2. Miss Wang's good way of remembering things is to ______. [ ]

A. buy a new book

B. write down stories

C. take a lot of photos

D. make a yearbook

3. A yearbook is made to ______.[ ]

A. take notes

B. keep the memory

C. do our homework

D. remember English words

4. Usually a yearbook is made in ______.[ ]

A. January

B. February

C. May

D. December

5. We made our first yearbook ______. [ ]

A. without any help

B. without putting our love into it

C. with the help of our teacher

D. with the help of our parents

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