A.1.96mg/m3 B.1960mg/m3 C.0.020mg/m3 D.510mg/m3 E.百分濃度未注明是否在標(biāo)準(zhǔn)狀況無(wú)法計(jì)算
A.1.9 B.0.5 C.1.5 D.1 E.2.5
A.Ni2+ B.Ca2+ C.K+ D.Na+ E.Ba2+