单项选择题
A.water leakage B.steam leakage C.oil leakage D.air leakage
A charge of fresh air is drawn into the engine cylinder...
单项选择题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
A cast steel strong back is fitted in way of the combus...
单项选择题A cast steel strong back is fitted in way of the combustion space to help absorb （）.
A.flame temperature B.fuel oil C.air movement D.gas forces
（） clearances in the main or crank pin bearings will so...
单项选择题（） clearances in the main or crank pin bearings will sometimes be indicated by loss of pressure in the lubricating system before any bearing knock is heard.
A.Too larger B.Too smaller C.Excess D.Excessive
