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單項選擇題

The fuel is supplied to the pump through ports or openings in the （） or cylinder of the pump.

A.bottle
B.injector
C.piston
D.barrel

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單項選擇題

The fuel injector pump is operated by （） which drives the plunger up and down.

A.a separate motor
B.a cam
C.a generator
D.a chain

單項選擇題

The fuel injector injects a fine spray of fuel into the hot air and combustion （）, producing much high pressure in the gases.

A.has begun
B.takes place
C.occurs
D.happens

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