煤层顶板可分为伪顶、直接顶和（）3种类型。在采煤过程中，直接顶是顶板管理的重要部位。

阅读理解。

     We each have memory (记忆力). That’s why we still remember things after a long time. Some people have very good memories and they can easily learn many things in a shot time, but some people can only

remember things when they say or do them again and again. Many of the great men of the world have

surprising memories.

      A good memory is a great help in learning a language. Everybody learns his mother language when he

is a small child. He learns the sounds, remember them and then he learns to speak. Some children are living with their parents in foreign countries. They can learn two languages easily because they hear, remember

and speak two languages every day. In school it is not so easy to learn a foreign language because the

students have so little time for it, and they are busy with other subjects, too.

     But your memory will become better and better when you do more and more exercises.

1. Why can some people easily learn many things in a short time?

A. They always sleep very well

B. They often eat good food and fish.

C. They read a lot of books.

D. They have very good memories.

2. When does everyone learn his mother language?

A. At the age of six.

B. When he is a small child.

C. After he goes to school.

D. When he can read and write.

3. What does a child need to do before he can speak?

A. He must read and write.

B. He must chat with others.

C. He must hear and remember the sounds.

D. He must think hard and listen to much music.

4. What can you do if you want your memory become better?

A. You must eat a lot of food, especially lots of fish.

B. You must keep practicing it.

C. You must say or do things only once.

D. You must become a great man.

5. Why can a Chinese learn English easily if he is in England?

A. Because he must speak English every day.

B. Because he will have a good memory in England, not in China.

C. Because his father is an English man.

D. Because his English teacher is better in England.

男性，50岁，1年来出现耳鸣，以右侧明显，如火车轰鸣样。右视力下降。查体：右侧突眼，球结膜充血，右侧颞部可闻与脉搏一致的轰鸣样杂音。

最佳的检查是（）。

A.MRI

B.MRA

C.PET

D.DSA

E.ECT

翻译下面的谚语。

When I walk with two others, they must serve me as my teachers.

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简述理腰三击掌法的操作。

在可供选择的项目报价条件下，对于技术难度大或其他原因导致的难以实现的规格，投标人可采取的报价策略是( )。

A．报价适当降低，待澄清后可再要求提价B．采用正常价格报价
C．避免报高价，以免抬高总报价
D．有意将报价提高得更多一些