题目详情
单选题 【Single choice question(单选题)】Doors and Windows should not be opened on the firewall. If it is necessary to open, fire retardant doors and Windows should be set up with fire resistance limit not less than ( ).(防火墙上不应开设门窗洞口,如必须开设时,应设置耐火极限不低于( )的防火门窗.)
A. 1
B. 1.1
C. 1.2
D. 1.15

学科:《室内设计》国际化培训资源包
时间:2023-07-06 14:22:32
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