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hoaisonk57a1s
2 năm trước
Đường phèn thường khó tan hơn đường cát,tại sao người ta thường hay dùng đường phèn trong các món ăn cần đun nấu?Việc này có liên quan gì đến chuyển động của các phân tử đường phèn và nhiệt độ?
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