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單項選擇題

The energy for pushing this piston up can be supplied from （）, so that the piston can keep moving up and down.

A.the same piston
B.the piston nearby
C.the other pistons
D.the generators on board

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單項選擇題

The efficiency of turbocharge system is increased by fitting a charge air cooler （） the compressor.

A.inside
B.before
C.after
D.against

單項選擇題

The distance from TDC to BDC of the diesel engine is called （）.

A.gap
B.clearance
C.radius
D.stroke

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