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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1.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

2.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

5.單項(xiàng)選擇題A distance piece, known as a () may be interposed between the rod and the bearing housing.

A.bearing shell
B.bearing liner
C.compression plate
D.lead wire