单项选择题
A.防火衣 B.消防头盔 C.灭火器 D.防火面罩
A.警报 B.演示 C.控制 D.信号
A. open fire doors B. close fire doors C. put on fire doors D. put off fire doors
A. release a lifebuoy B. release a life-jacket C. release a lifeboat D. release a life-raft
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