单选题A diesel engine crankcase ventilation system （）Aprevents spark generationBremoves combustible gasesCdetermines the level of combustible gasesDprovides inert gas generation in crankcase
单选题
A diesel engine crankcase ventilation system （）
A
prevents spark generation
B
removes combustible gases
C
determines the level of combustible gases
D
provides inert gas generation in crankcase
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