单选题A diesel engine is supercharged in order to（）Alower the no-load RPMsBprovide more air for combine with the fuelCincrease the no-load RPMsDprovide more fuel combine with the air
单选题
A diesel engine is supercharged in order to（）
A
lower the no-load RPMs
B
provide more air for combine with the fuel
C
increase the no-load RPMs
D
provide more fuel combine with the air
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