题目内容

Women officers make up 13% of the police force.What is the meaning of the ‘make up’in the sentence?

A.make-up such as powder or lipstick is put on your face
B.work some extra hours
C.consist of
D.compile

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The fine was for the company's ___ of the air near its plants.

A.pollute
B.pollutant
C.pollution
D.polluted

The contraction of muscles uses energy and releases heat.What is the meaning of the ‘release’in the sentence?

A. to let somebody or something come out of a place where they have been kept or trapped
B. to express feelings
C. to free somebody from a duty
D. to make something less tight

There are hundreds of ___ spiders and snakes.

A.prison
B.poison
C.poisonous
D.prisoner

运算放大器的组成部分有()。

A. 输入级
B. 发射极
C. 中间级
D. 输出级
E. 偏置电路

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