单项选择题
Fuel is not supplied to the corresponding cylinders due to （）.
A.a failure of the motor B.a failure of lubricator C.a failure of cylinder D.a failure of fuel pump
单项选择题 Fuel is not supplied to the corresponding cylinder due to a failure of （）.
单项选择题 Fuel is delivered into the combustion space by （）.
单项选择题 Fuel injection valves should be taken out, cleaned, and lifting checked every （）.
