题目内容

保守力作功的特点是:功的大小只与物体运动的始末位置有关,而与物体所经历的路径无关。

A. 对
B. 错

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The swimmer _______ from the lake.

A. emerged
B. emerging
C. is emerged
D. was emerged

Her paintings have gained in _________ over recent years.

A. popular
B. popularity
C. unpopular
D. unpopularity

She admitted to ________been there.

A. have
B. had
C. has
D. having

I'm going to _________late with my friend and watch movies.

A. stay up
B. stay with
C. staying up
D. staying with

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