确定学校体育目标的依据为 ( )A．学校体育内部所固有的特性 B．社会发展的需要

多色静电感光复印机(直接法)( ) A．21 B．22 C．23 D．24

阅读理解。

     There is an old English saying. It tells us that we must go to bed early and get up early in the morning.

Then we shall be healthy. We shall also be rich and clever. This is true.

     The body must have enough sleep to be healthy. Children of young age should have ten hours' sleep

every night. Children who do not have enough sleep cannot do their work well and they may not be healthy.

The body also needs exercise. Walking, running, jumping and playing games are all exercise.

     Exercise keeps the body strong. Exercise also helps the blood to move around inside the body. It is very

important. Our blood moves to all parts of our body. The head also needs blood. Exercise helps us to

think better.

1. If we want to be healthy, we must ______. [ ]

A. eat more

B. sleep more

C. play more

D. go to bed early and get up early

2. Children of young age should have ______ hours' sleep every day. [ ]

A. ten

B. nine

C. eleven

D. twelve

3. If children don't have enough sleep, they will not ______. [ ]

A. work well

B. be clever and healthy

C. eat well

D. A and B

4. The body also needs ______. [ ]

A. sports

B. running

C. exercise

D. playing

5. Does exercise help us to think better? [ ]

A. Yes, it does.

B. No, it doesn't.

C. No, it does.

D. Yes, it deosn't.

悬锤式水位计的基准板或基准点的高程测量，可每年汛前校测（），当发现有变动迹象时，应及时校测。

A、三次

B、两次

C、一次

D、四次

掘进机主要由切割、装运、行走和液压系统等4部分组成。

GB1576—2001《低压锅炉水质》中规定，（）的承压热水锅炉给水应除氧，（）的承压热水锅炉和常压热水锅炉给水应尽量除氧。