有两台三相异步电动机，它们的额定功率相同，但额定转速不同，则

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问题单项选择题

有两台三相异步电动机，它们的额定功率相同，但额定转速不同，则（）

A.额定转速小的那台电动机，其额定转矩大

B.额定转速大的那台电动机，其额定转矩大

C.两台电机的额定转矩相同

答案

参考答案：A

阅读理解

阅读理解。

One Sunday afternoon Mr Green and his child, Mary, are in a big shop. Mr Green likes Mary and

wants to buy a new dress for her. Mary doesn't like the new dress. She likes something to eat. So her

father buys two kilos of apples for her, too. Mary also wants to buy some picture-books and coloured

pencils. There are many things and many people in the shop. They are men and women, old and young.

They all want to buy something there. The people in the shop are very frendly.

1. It is _____.

A. Saturday

B. Monday

C. Friday

D. Sunday

2. Mary and _____ are in the shop.

A. Mrs Green

B. his father

C. her father

D. her mother

3. Mary likes to buy _____.

A. a new dress

B. coloured books

C. apples, picture-books and coloured pencils

D. something to drink

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