题型:单项选择题 甲、乙、丙级防火门的耐火极限分别不低于()。A.1.00h,1.00h,1.00h B.1.00h,1.50h,0.50h C.1.50h,1.00h,1.00h D.1.50h,1.00h,0.50h 查看答案