单项选择题
A.Disconnect the battery cables from the starting motor
B.Drain the hydraulic fluid from the governor sump
C.Block the flow of cooling air to the radiator
D.Secure the fuel supply and block the air intake
单项选择题 The efficient burning of fuel in a diesel engine is dependent upon the （）
单项选择题 Persistent knocking of one cylinder of a diesel engine ceases when the fuel supply to that cylinder is securedThis problem may be a result of （）
单项选择题 Engine coolant accumulating in the diesel engine lubricating oil can result from a （）