單項(xiàng)選擇題ppm的表達(dá)式為:()

A.溶質(zhì)質(zhì)量/溶液質(zhì)量(×)106
B.溶質(zhì)質(zhì)量/溶液質(zhì)量(×)10-6
C.溶質(zhì)質(zhì)量/溶液質(zhì)量(×)109
D.溶質(zhì)質(zhì)量/溶液體積
E.溶液質(zhì)量/溶質(zhì)質(zhì)量(×)106


您可能感興趣的試卷