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Câu hỏi xử lý nước mỗi ngày (12.10)

2016-12-09View Original

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(Câu hỏi trắc nghiệm) Trong số các chất dưới đây, _________ là chất gây hại cho vi sinh vật hiếu khí. A. DO B. Độ màu C. Phenol D. Chất lơ lửng C

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