题目内容

圆管内流动也被称为____。

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湍流程度足够大时,流体可当理想流体处理。

A. 对
B. 错

边界层以内速度梯度为0。

A. 对
B. 错

Tom could do nothing but_______to the police that he had stolen the money from the girls bag.

A. admit
B. admitted
C. admitting
D. to admit

The children went home from the English school, their lessons______for the day.

A. finishing
B. finished
C. has finished
D. were finished

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