ôn tập-halogen

on-tap

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3 phản hồi

  1. cho em hoi nhung bai tap nay k co dap an a
    phai xem dap an o dau ah

  2. e muon co cac bai tap ve hieu suat lop 10 lien quan tooi axit clohdric va bai tap ve hieu suat cua cac chat co trong chuong 5 va chuong 6 cua chuong trinh hoa hoc 10

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