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
A: 1.50h，0.25h\n
B: 1.00h，0.25h\n
C: 1.50h，0.15h\n
D: 1.00h，0.15h
举一反三
- 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
- 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和0.25h B: 1.00h和0.25h C: 1.50h和0.15h D: 1.00h和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和0.25h B: 1.00h和0.25h C: 1.50h和0.15h D: 1.00h和0.15h
- 耐火等级为二级时楼板和吊顶的耐火极限应满足() A: 1.5h,0.25h B: 1.00h,0.25h C: 1.50h,0.15h D: 1.00h,0.15h