A.0.1mg/LB.0.2mg/LC.0.3mg/LD.0.4mg/L
A.亞硝酸鹽>氨氮>硝酸鹽B.氨氮>硝酸鹽>亞硝酸鹽C.硝酸鹽>氨氮>亞硝酸鹽D.氨氮>亞硝酸鹽>硝酸鹽
A.NH3(NH4+)B.NO2-C.N2D.NO3-