单项选择题
Halon gas will decompose and may form very hazardous toxic fumes when discharged（）.
A.directly on flames
B.at room temperature
C.in an extremely cold climate
D.None of the above
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A.lay the patient down and cover the wound when the bleeding stops
B.stop the bleeding，clean，medicate，and cover the wound
C.apply an ice pack to the wound and cover it when the bleeding stops
D.apply a hot towel to purge the wound，then medicate and cover it -
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