题目内容

Myfrienddoesonethingonedayandjustthe______thenext.Hisbehaviorisinconsistent.

A. other
B. alternative
C. negative
D. opposite

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Theydidconsiderableworkto______themassesoftheUnitedStateswiththeelementaryproblemofLatinAmerica.

A. instruct
B. acquaint
C. devote
D. impart

Ifelttiredoftheperformanceandwasabouttoleave,______somethingoccurredwhichattractedmyattention.

A. unless
B. while
C. when
D. until

干式卧式壳管式蒸发器制冷剂在管内流动,而载冷剂在管外(壳体内) 流动。

A. 对
B. 错

满液式卧式壳管式蒸发器载冷剂下进上出,走管程。

A. 对
B. 错

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