单项选择题
A.相邻一侧装有固定甲级防火窗 B.相邻一侧装有固定乙级防火窗 C.相邻两侧装有固定甲级防火窗 D.相邻两侧装有固定乙级防火窗
A.1.10m B.1.30m C.1.50m D.1.60m
A.6m B.7m C.9m D.1lm