A.0.1≤p<1.6 B.1.6≤p<10 C.10≤p<100
A.小于0.5% B.小于1.5% C.小于2.5% D.小于2.0%
A.防爆 B.應(yīng)急疏散 C.貴重物資重點(diǎn)保護(hù)