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2023-12-24 21:47:21
a. Ví dụ: Sắt; đồng;...
b. Ví dụ: Nước
c. Ví dụ: Khí nitơ; khí oxygen
2023-03-05 21:34:53
Nỗi buồn khiến con người suy nghĩ tiêu cực hơn.
Chúc bạn học tót!
2022-01-31 17:21:52