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问题 单项选择题

高原负荷开关广泛用于10KV，500KV及以下电力变压器的保护和控制，是因为（）。

A.有灭弧装置

B.在断开时有明显可见的断开间隙

C.有高压熔断器作短路保护

答案

参考答案：C

阅读理解

阅读理解。

     This is Mr. Smith. He is from America. He is in Beijing now. He teaches us English in our school. He

often wears (穿) a white shirt and black pants. He can speak a little Chinese. He likes teaching in China

very much. And he says he likes to live in Beijing.

     We like his lessons (课) very much. We can learn (学会) much from him. He is our good friend, too.

1. Mr. Smith is from _____.

A. the U.S.A.

B. England

C. China

D. English

2. Mr. Smith teaches _____ very well.

A. English

B. Chinese

C. Japanese

D. French (法语)

3. He likes to wear _____.

A. a white shirt

B. black pants

C. white pants

D. A and B

4. He says _____.

A. he lives in Shanghai

B. he speaks a little Chinese

C. he likes to live in Beijing

D. he can teach English well

5. We like _____ very much.

A. him

B. his lessons

C. his English

D. he
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单项选择题

除非塔台管制室可以提供目视间隔或与管制单位间另有协议，雷达管制员在履行进近管制职责时，应当对着陆航空器（）的正确与否负责。

A.姿态

B.间隔

C.航向

D.下降梯度
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