A.金屬火災(zāi)B.固體物質(zhì)火災(zāi)C.氣體火災(zāi)D.液體或可熔化的固體物質(zhì)火災(zāi)
A.0.04B.0.25C.0.8D.0.6
A.要約B.規(guī)定C.承諾D.約定