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【Daily Question】Utilities - Water Supply and Drainage - 20200203

2020-02-03View Original

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In which of the following situations is a combined sewer system appropriate? A. The community is equipped with a drainage system that separates domestic sewage from domestic waste water. B. When the city has sewage treatment plants. C. When buildings have high requirements regarding hygiene standards. D. When domestic sewage must be treated in septic tanks before it can be discharged into the municipal drainage system. Answer: B

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