单选题The ignition of the fuel in diesel engine is caused by the （） of compression of the air previously admitted into the cylinders.Avacuum pressureBspecific gravityCheatDviscosity
单选题
The ignition of the fuel in diesel engine is caused by the （） of compression of the air previously admitted into the cylinders.
A
vacuum pressure
B
specific gravity
C
heat
D
viscosity
参考解析
解析：
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