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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1.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

2.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