问题
单项选择题
When choosing extinguishers to fight a Class “B” fire do NOT use（）.
A.carbon dioxide
B.dry chemical
C.foam (stored-pressure type)
D.water (cartridge-operated)
答案
参考答案：D
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When choosing extinguishers to fight a Class “B” fire do NOT use（）.
A.carbon dioxide
B.dry chemical
C.foam (stored-pressure type)
D.water (cartridge-operated)
参考答案：D