题目内容
(请给出正确答案)
[单选题]
耐火等级为二级时楼板和吊顶的耐火极限应满足()。
A.1.50 h,0.25 h
B.1.00h,0.25 h
C.1.50 h,0.15h
D.1.00 h,0.15 h
答案
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A.1.50 h,0.25 h
B.1.00h,0.25 h
C.1.50 h,0.15h
D.1.00 h,0.15 h
第7题
A.80%,80%
B.80%,85%
C.85%,80%
D.85%,85%