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單項選擇題

The development goals for a large marine engine are many often interact and in some cases even with each other（）

A.conflict
B.accord
C.harmonize
D.struggle

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單項選擇題

The key feature of the Sulzer RT-flex system is that it gives complete freedom in the and operation of fuel injection and exhaust valve actuation（）

A.metering
B.control
C.using
D.timing

單項選擇題

A clearly visible beneath of RT-flex engines is their operation at all ship speedsThis is achieved by the superior combustion performance（）

A.shockless
B.smokeless
C.no vibration
D.noiseless

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