图中电路二极管VD 1 截止,VD 2 导通, AO两点间的电压U AO =4.5V 。 设二极管正向电阻为零,即其管压降为零;反向电阻为无穷大,即反向电流为零)。
A.
正确
B.
错误
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【简答题】The Lantern Festival first evolved along the banks of the Yellow River during the peak of freezing winter conditions. The celebration held on the night of the first full noon of the lunar new year is ...