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【单选题】
桥式整流滤波电路中,已知U2=10V,下列说法不正确的是( )。A.
如果D2开路,则输出电压U0为10V
B.
当负载RL开路时,输出电压U0位10V
C.
当电容C虚焊时,电路的输出电压为9V
D.
如果D2管开路,则D1的最高反向工作电压应不小于10V
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