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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單項選擇題

The fresh air coming in through the inner air ports, is compressed by（） to a higher pressure.

A.the cylinder head
B.the cross-head
C.the moving piston
D.the stationary piston

單項選擇題

The fourth engineer accompanied by the workers on oil barge measures the oil levels, temperature and （） in the tanks.

A.tank table
B.trim
C.water contents
D.oil pressure

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