In an operating diesel engine, pre-ignition can be caused by （）<br>A:excessively late fuel injection<br>B:oil in the air charge<br>C:water in the fuel<br>D:injection continuing after the fuel charge is ignited

In an operating diesel engine, pre-ignition can be caused by （）
A:excessively late fuel injection
B:oil in the air charge
C:water in the fuel
D:injection continuing after the fuel charge is ignited

出自：海船船员证

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