应保证每个防火分区不少于()消防救援口。
A.1个
B.2个
C.3个
D.4个
参考答案:B
解析:消防救援口沿建筑外墙逐层设置,设置间距不宜大于20m。须保证每个防火分区不少于2个。
She is an ___girl
A.eight-year-old
B.eight years old
C.eight-years-olds
D.eight-year-olds
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