单项选择题
A.0.12~0.16mg/LB.不超过0.02~0.04mg/LC.0.08~0.12mg/LD.0.04~0.08mg/L
A.200~300μmB.100~200μmC.300~400μmD.0.1~100μm
A.1920B.1930C.1925D.1935