單項(xiàng)選擇題

The quality of the fuel oil and lube oil （）, Im afraid.

A.has much to do with the operation of the engine and its life
B.have much to do with the operation of the engine and its life
C.has much doing with the operation of the engine and its life
D.have much doing with the operation of the engine and its life

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單項(xiàng)選擇題

The fuel injection system is very important, so any trouble of it will （） the operation of the main engine.

A.be affected
B.affect
C.be effected
D.effect

單項(xiàng)選擇題

If you don’t understand the meaning of the technical terms of the diesel engine, you can （） the dictionary of machine technology.

A.look for
B.find out
C.consult
D.read