单项选择题
Which types of portable extinguisher should you watch for the reflash of the fire?（）
A.foam and water
B.CO2 and dry chemical
C.dry chemical and water
D.foam and CO2
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相关考题
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单项选择题
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 -
单项选择题
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 -
单项选择题
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
