题目内容

活塞通常采用的润滑方式是压力润滑

A. 对
B. 错

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活塞环的端隙又称开口间隙，是活塞环自由状态下的开口处间隙。

A. 对
B. 错

活塞销偏置的目的是防止活塞在换向时，撞击汽缸壁而产生“敲缸”

A. 对
B. 错

-The traffic jam is driving me mad! - _____ Such is often the case on Monday mornings.

A. Keep cool.
B. Well done.
C. No way.
D. Sounds good.

- Would you mind moving your bike? - _____ I’ll do it right away.

A. Of course.
B. Not in the least.
C. Never mind.
D. Why not?