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Câu hỏi xử lý nước mỗi ngày (12.26)

2016-12-26View Original

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Câu hỏi trắc nghiệm: Việc nước sạch và nước thải hòa lẫn với nhau dễ gây ra tình trạng đóng cặn là do các chất lắng trong nước hỗn hợp. A. Chất hữu cơ B. Canxi cacbonat C. Tạp chất D. Bùn đất. Đáp án: B

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