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單項(xiàng)選擇題

A portable foam fire extinguisher is placed in operation by（）

A.turning it upside down
B.pressing the foam lever
C.squeezing the grip handle
D.opening the hose valve

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單項(xiàng)選擇題

Before you begin administering artificial respiration, you should be sure the victim（）

A.is comfortable
B.is warm
C.is not bleeding
D.has a clear airway

單項(xiàng)選擇題

If liquid freon should come in with your skin, you should （）

A.wash with salt water
B.wash with sterile mineral oil
C.treat it like frostbite
D.treat it like any burn

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