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單項(xiàng)選擇題

The shutter of the evaporator was blocked with （）, it means there was too much evaporation.

A.ice
B.wooden board
C.iron plate
D.cotton waste

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單項(xiàng)選擇題

The inner part of the condenser should be cleaned with （）.

A.gas oil
B.diesel oil
C.chemical compound
D.Freon-12

單項(xiàng)選擇題

In the cargo winch, spur reduction gearing transfers the motor drive to （）.

A.the toping light
B.the board brake
C.the fail-safe
D.the barrel shaft

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