A.田間調(diào)查B.資料查閱C.數(shù)據(jù)分析D.上級(jí)調(diào)取
A.8hB.12hC.24hD.48h
A.特異性毒劑B.神經(jīng)毒劑C.呼吸毒劑D.物理性毒劑