单项选择题
A.connecting rods B.main bearing C.column D.tie rods
The function of a lubricating oil is () to lubricate th...
单项选择题The function of a lubricating oil is () to lubricate the running surface () to carry away a great deal of heat.
A.not;but B.neither;nor C.either;or D.not only;but also
The fuel pipes and ducts should be blown with ().A.atmo...
单项选择题The fuel pipes and ducts should be blown with ().
A.atmosphere B.the fresh water C.compressed air D.chemical compounds
The fuel oil system for a diesel engine can be consider...
单项选择题The fuel oil system for a diesel engine can be considered in two parts--the fuel supply and the () systems.
A.fuel treatment B.fuel combustion C.fuel injection D.fuel separating