單項(xiàng)選擇題耐火等級(jí)為二級(jí)時(shí),樓板和吊頂?shù)哪突饦O限應(yīng)分別滿足[]

A.1.50h,0.25h
B.1.00h,0.25h
C.1.50h,0.15h
D.1.00h,0.15h


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