單項(xiàng)選擇題

The diffuser prevents pressure pulses from one cylinder （） another during operation.

A.to interfere with
B.interfering with
C.to help scavenging
D.helping scavenging

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單項(xiàng)選擇題

The diesel engine must be started before it can run by it self For this purpose （） has to be used.

A.a starting system
B.the starting air
C.a starting operation
D.A, B and C

單項(xiàng)選擇題

The diesel engine is a type of internal combustion engine which ignites the fuel by injecting it into hot, high pressure air in a （）.

A.air bottle
B.air compressor
C.crank case
D.combustion chamber

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