单项选择题

A.耐火隔热性≥1.50h耐火完整性≥0.50h
B.耐火隔热性≥1.50h耐火完整性≥1.50h
C.耐火隔热性≥0.50h耐火完整性≥1.50h
D.只需耐火完整性≥1.50h