题目内容

Only in this way _____ do it well.

A. you are able to
B. are you able to
C. are able to yo
D. can you able to

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That question _____ we need it has not been considered.

A. that
B. how
C. where
D. whether

I’ m sorry we have sold _____ the trousers _____ your size.

A. out;in
B. off;with
C. away;of
D. on;in

在速度平行四边形中,绝对速度一定在平行四边形的对角线上。

A. 对
B. 错

一般情况下,牵连速度是牵连点的速度,牵连点的位置不同,则牵连速度不同。

A. 对
B. 错

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