A charge of fresh air is drawn into the engine cylinder and then () by the moving piston() very high pressure.

时间:2019-04-14 02:46:48 关键词:into,drawn,engine

A charge of fresh air is drawn into the engine cylinder and then () by the moving piston() very high pressure.

A.pressed;to

B.pressurized;with

C.pushed;in

D.compressed;to

答案解析

D