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doanhy1001
2 năm trước
Máy biến áp giảm áp khi nào ? A. N1 > N2 ; U1 > U2 B. N1 < N2 ; U1 < U2 C. N1 < N2 ; U1 > U2 D. N1 > N2 ; U1 < U2
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