單項選擇題

Treatment of frostbite includes（）.

A.rubbing affected area with ice or snow
B.rubbing affected area briskly to restore circulation
C.wrapping area tightly in warm cloths
D.warming exposed parts rapidly

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單項選擇題

The rescuer can best provide an airtight seal during mouth-to-mouth resuscitation by pinching the victim’s nostrils and（）.

A.cupping a hand around the patient's mouth
B.keeping the head elevated
C.applying his mouth tightly over the victim's mouth
D.holding the jaw down firmly

單項選擇題

The principal personnel hazard unique to Halon extinguishers is（）.

A.displacement of oxygen
B.skin irritation
C.inhaling toxic vapors
D.eye irritation