单项选择题
Fuel oil injected into the cylinder of a diesel engine just after the piston passes top dead center, will（）
A.increase engine power B.increase engine load C.decrease engine power D.improve fuel economy
单项选择题 Diesel engine injection lag is caused by（）
单项选择题 Abnormal crankpin bearing and piston skirt surface wear indicate（）
单项选择题 Injection lag in a diesel engine may be caused by（）
