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Vananh192
2 năm trước
một bóng đèn có hiệu điện thế định mức là 220 V , ĐAtự vào hai đầu bóng đèn các hiệu điện thế sau đây , hỏi trường hợp nào thì dây tóc bóng đèn sẽ bị đứt a, 110V B,220V C,300V D,200V
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