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單項(xiàng)選擇題

Fuel is delivered into the combustion space by （）.

A.a cooling system
B.a lubricating system
C.an electric system
D.an injection system

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單項(xiàng)選擇題

Fuel injection valves should be taken out, cleaned, and lifting checked every （）.

A.two to four months
B.four to six months
C.six to eight months

單項(xiàng)選擇題

Fuel injection uses the jet pump system and a Woodward type hydraulic （） is used to control engine speed.

A.controller
B.governor
C.instrument
D.apparatus

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