单项选择题
A.thrust block B.sounding rod C.connecting rod D.push rod
On a diesel engine, fuel is delivered into the combusti...
单项选择题On a diesel engine, fuel is delivered into the combustion space by （）.
A.a cooling system B.a lubrication oil system C.an electric system D.an injection system
Oil will lubricate these parts （） effectively than wate...
单项选择题Oil will lubricate these parts （） effectively than water.
A.much B.more C.most D.less
Oil pressure in the lubrication system is （） the static...
单项选择题Oil pressure in the lubrication system is （） the static sea water head to ensure that sea water （） the stem-tube.
A.lower than；can lubricate B.lower than；can cool C.higher than；can enter D.higher than ；cannot enter
