單項(xiàng)選擇題The governor of a generator engine is to ().

A.make the engine stop
B.regulate the timing of camshafts
C.make the rpm stabilize at any required value
D.make the engine run at nearly constant speed


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2.單項(xiàng)選擇題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

3.單項(xiàng)選擇題The fuel pipes and ducts should be blown with ().

A.atmosphere
B.the fresh water
C.compressed air
D.chemical compounds

4.單項(xiàng)選擇題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