單項(xiàng)選擇題

A heater in the circuit facilitates warning of the engine prior to （） by circulating hot water.

A.starting
B.stopping
C.to start
D.to stop

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單項(xiàng)選擇題

A gudgeon pin in a trunk piston may be free to float and rotate, with （） to limit axial movement.

A.split pins
B.crankpins
C.dipsticks
D.circlips

單項(xiàng)選擇題

A governor automatically controls engine speed by regulating （）.

A.fuel supply
B.firing order
C.engine load
D.oil level

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