单选题Late fuel injection in a diesel engine is indicated by low firing pressure with（）Ahigh exhaust temperatureBlow exhaust temperatureCfuel knock in each cylinderDmechanical knock in each cylinder
单选题
Late fuel injection in a diesel engine is indicated by low firing pressure with（）
A
high exhaust temperature
B
low exhaust temperature
C
fuel knock in each cylinder
D
mechanical knock in each cylinder
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