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meoconchuotcon8487
2 năm trước
Có 1 nguồn 9 vôn, 3 bóng đèn mỗi bóng 4,5 vôn và 3 bóng đèn 3 vôn. Hãy vẽ sơ đồ các mạch điện có thể thắp sáng các mạch điện nói trên. a, Chọn 1 số bóng đèn nói trên b, Dùng hết các bóng đèn nói trên.
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