單項選擇題As for turbine oil, contacting with water in the form of steam will be inevitable so good () properties will be essential.

A.defrosting
B.de-oiling
C.demulsifying
D.dehumidifying


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2.單項選擇題The usual method of effectively applying foam on a fire is by ().

A.spraying directly on the base of the fire
B.flowing the foam down a vertical surface
C.sweeping the fire before you with the foam
D.spraying directly on the surface of the fire