题目内容

溴化锂吸收式制冷机是由()和热交换装置等热交换设备和若干溶液泵组成。

A. 吸收器
B. 蒸发器
C. 冷凝器
D. 发生器

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I would suggest you book the ticket one day ( )

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D. in the future

I am leaving ( ) Beijing tomorrow, but I haven’t got the ticket?

A. to
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C. for
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( ) to take a brochure for you, please.

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A. dirty
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