单项选择题
The blower type crankcase ventilation system （）
A.removes combustible gases in the crankcase B.prevents the formation of combustible gases in the crankcase C.cools lubricating oil D.improves cold weather starting
单项选择题 One remedy for a high firing pressure, in addition to a high exhaust temperature in one cylinder of a diesel engine, is to （）
单项选择题 What is the best way of stopping an over-speeding diesel engine?（）
单项选择题 The efficient burning of fuel in a diesel engine is dependent upon the （）
