A.2400 B.2500 C.4500 D.5000
A.地下一層 B.地上二層 C.地上三層 D.地上四層
A.不燃燒體,0.25h B.難燃燒體,0.25h C.難燃燒體,0.5h D.不燃燒體,0.5h