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当前学科：消防安全技术综合能力综合练习
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在进行防火窗检查时，切断活动式防火窗电源，加热温控释放装置，使其热敏元件动作，观察防火窗动作情况，活动式防火窗在温控释放装置动作后（）内应能自动关闭。
A . 60s
B . 80s
C . 100s
D . 120
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