题目内容

【单选题】In the _______ of research, it is an accepted fact that scientific publications have to be written or translated into English to get published,acknowledged,and cited.

A. remain
B. maintain
C. attain
D. domain

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【单选题】He received a(n) _______ call threatening to disclose details of his affair if he didn’t pay the money.

A. anonymous
B. synonymous
C. anonymity
D. synonym

【单选题】The movie presents Lincoln as a strong-willed,_______ man who led the US through a moral, constitutional and political crisis.

A. conscious
B. conscientious
C. conscience
D. consciousness

【单选题】It is understandable that the health and welfare of their family is a(n) _______ concern for this young couple.

A. perpetual
B. integral
C. original
D. popular

活塞环的作用是（）。

A. 密封
B. 导热
C. 润滑
D. 传递动力