单项选择题：异步电动机在启动瞬间，转子绕组中感应的电流很大，使定子流过的启动电流也很大，约为额定

题型：单项选择题

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.

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异步电动机在启动瞬间，转子绕组中感应的电流很大，使定子流过的启动电流也很大，约为额定

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