单项选择题
A.1.5m B.1.3m C.1.2m D.1.1m
A.30m,50m B.25m,30m C.20m,40m D.20m,30m
A.7m,10m B.7m,13m C.10m,15m D.10m,13m
A.同层,1个 B.同层,2个 C.着火层及相邻上下层,2个 D.着火层及相邻上下层,1个
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