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English Translations » 历史存档[信息] » Daily Water Treatment Question (12.8)

Daily Water Treatment Question (12.8)

2016-12-08View Original

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Multiple-choice: Which of the following statements is correct? A. Heavy metal elements are one of the nutrients for activated sludge. B. Heavy metal elements are harmful to activated sludge. C. The concentration of heavy metal elements should neither be too high nor too low. D. Heavy metal elements have no effect on activated sludge. B
Reply #22016-12-08
B. Heavy metal elements are harmful to activated sludge
Reply #32016-12-08
B. Heavy metal elements are harmful to activated sludge
Reply #42016-12-08
B. Heavy metal elements are harmful to activated sludge

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Translated at 2026-07-20 22:47:11

Original: https://bbs.hcbbs.com/thread-1649768-1-1.html

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