题目内容

空穴现象常出现在什么地方

A. 阀口
B. 液压缸
C. 泵的入口
D. 节流阀

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I did not like the house at the beginning but the new furniture ________ all the difference.

A. took
B. made
C. did
D. had

I stopped smoking for the ________ of health.

A. sake
B. reason
C. cause
D. purpose

You should make ________ your bed before you leave for school.

A. off
B. out
C. up
D. on

I ________ to give you the book today, but I forgot to bring it.

A. realized
B. concerned
C. counted
D. meant

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