單項選擇題

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

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單項選擇題

Oil will lubricate these parts （） effectively than water.

A.much
B.more
C.most
D.less

單項選擇題

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

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