生活污水含纤维素,淀粉、糖类、脂肪、蛋白质等有机类物质,其浓度可以用()表示。
A、化学需氧量
B、石油类
C、挥发酚
D、多环芳烃
E、生化需氧量
参考答案:A, E
--- Good news! The great movie is on in the cinema
---Nothing new.I_________ it with my parents on the first day.
A.would see
B.see
C.saw
D.had seen
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