Everyone knows it except _____ . [ ]

A. you and I      

B. you and me      

C. I and you      

D. he and me

污水中的有机物通过生物降解，产物为（）

A.H₂O

B.CO₂、H₂O

C.细胞物质、CO₂、H₂O

D.污泥、CO₂、H₂O