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Binh1212
2 năm trước
Xác định VTTN,VTNT: Dây điện làm bằng đồng được bọc một lớp chất dẻo. A. Vật thể nhân tạo: dây điện. Chất: đồng. B. Vật thể tự nhiên: dây điện. Chất: đồng. C. Vật thể: đồng, chất dẻo. D. Vật thể nhân tạo: dây điện. Chất: đồng, chất dẻo.
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