单项选择题
A.to interfere with B.interfering with C.to help scavenging D.helping scavenging
The diffuser prevents pressure pulses from one cylinder...
单项选择题The diffuser prevents pressure pulses from one cylinder （） another during operation.
The diesel engine must be started before it can run by ...
单项选择题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
The diesel engine is a type of internal combustion engi...
单项选择题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
