单选题Late fuel injection occurring at, or after TDC in a diesel engine is indicated by excessive exhaust smoke and （）Alow exhaust temperatureBlow firing pressureCfuel knock in each cylinderDmechanical knock in each cylinder
单选题
Late fuel injection occurring at, or after TDC in a diesel engine is indicated by excessive exhaust smoke and （）
A
low exhaust temperature
B
low firing pressure
C
fuel knock in each cylinder
D
mechanical knock in each cylinder
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