A.much
B.more
C.most
D.less
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A.lower than；can lubricate
B.lower than；can cool
C.higher than；can enter
D.higher than ；cannot enter
A.the cylinder cover
B.the piston rings
C.the piston crown
D.the piston skirt
A.whatever
B.whenever
C.wherever
D.whoever
A.scavenging
B.starting
C.cooling
D.blowing
A.make use of
B.have made the use of
C.by means of
D.make advantage of
最新試題
When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.
The function of diesel engine piston compression rings is to （）.
The highest pressure in a diesel engine cylinder normally occurs （）.
Diesel engine control can be obtained by the bridge （）.
What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）
In a simple mechanical governor, the （）.
If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a （）.
A diesel engine piston ring face is in direct contact with the （）.
Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.
Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to （）.