耐火等级为二级时,楼板和吊顶的耐火极限应分别满足[]
举一反三
- 25. 耐火等级为二级时楼板和吊顶的耐火极限应分别满足( )
- 耐火等级为二级时楼板和吊顶的耐火极限应满足( )
- 中国大学MOOC: 3、耐火等级为二级时高层建筑的楼板和吊顶的耐火极限应分别满足 。
- 耐火等级为二级时,楼板和吊顶的耐火极限应分别满足[] A: 1.50h,0.25h\n B: 1.00h,0.25h\n C: 1.50h,0.15h\n D: 1.00h,0.15h
- 耐火等级为二级时,楼板和吊顶的耐火极限应分别满足[] A: 1.50h,0.25h\n B: 1.00h,0.25h\n C: 1.50h,0.15h\n D: 1.00h,0.15h