单选题If you notice smoke coming fro the crankcase exhaust fan outlet of an operating diesel engine, you would suspect（）Aa cracked cylinder linerBclogged intake portsCbroken piston ringsDa faulty head gasket
单选题
If you notice smoke coming fro the crankcase exhaust fan outlet of an operating diesel engine, you would suspect（）
A
a cracked cylinder liner
B
clogged intake ports
C
broken piston rings
D
a faulty head gasket
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