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HOC VI N THUC HI N NHO M 3

2. H? TH?NG CHAN NU?I. ??i tu?ng v? vai tr? chan nu?iQuan h? gi?a chan nu?i v? tr?ng tr?tH? th?ng chan nu?iCo c?u d?n gia s?c.Nh?ng v?n d? c?n ch? ? trong chan nu?i hi?n nay. 3. 1. ??I TU?NG V? VAI TR? C?A CHAN NU?I. ??i tu?ngGia s?cGia c?mVai tr?Cung c?p s?n ph?m c? gi? tr? (th?t, tr?ng, s?

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HOC VI N THUC HI N NHO M 3

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