单项选择题
In the cylinder head of a two-stroke/cycle diesel engine, valves are used for（）
A.air intake B.a fuel outlet C.cooling water inlets D.exhausting combustion gas
单项选择题 Diesel engine piston seizure can be caused by （）
单项选择题 Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine by（）
单项选择题 Improperly fitted piston rings in a diesel engine can cause（）
