A smoking exhaust from an operating diesel engine could be caused by （）<br>A:low sulfur content in the fuel<br>B:a loose injector inlet connection<br>C:late fuel injection<br>D:high injection pressure

A smoking exhaust from an operating diesel engine could be caused by （）
A:low sulfur content in the fuel
B:a loose injector inlet connection
C:late fuel injection
D:high injection pressure

出自：海船船员证

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