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單項選擇題

The sequence of fuel injection into cylinders is determined by （）.

A.the steering
B.the driven gear
C.the turning gear
D.the timing gear

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單項選擇題

The selection of an oil from the （） depends to a great extent on the operating conditions, the design of the engine and the type of fuel to be burned.

A.commercially available
B.commercially
C.commercial available
D.commerce available

單項選擇題

The selection of an oil depends （） on the operating conditions, the design of the engine and the type of fuel to be burned.

A.to a great extent
B.on a great extent
C.on mainly
D.on only

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