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【单选题】
某耐火等级为二级的多层电视机生产厂房,地上4层,设有自动喷水灭火系统,该厂房长20m,宽40m,每层划分为1个防大分区。根据现行囯家标准《建筑设计防火规范》(GB50016),供消防人员进入厂房的救窗囗的下列设计方案中。正确的是( )A.
救援窗囗下沿距室内地面为1.1m
B.
救援窗口的净争宽度为0.8m
C.
厂房二层沿一个长边设2个救援窗口
D.
利用天窗作为顶层救援窗口
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A.
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B.
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C.
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