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
点击查看答案&解析
相关考题
-
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 -
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 -
单项选择题
The fuel is supplied to the pump through ports or openings in the （） or cylinder of the pump.
A.bottle
B.injector
C.piston
D.barrel
