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图示电路中，A、B端电压U=________。
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图示电路中，A、B端电压U=________。
A、-2V
B、-1V
C、2V
D、3V
时间：2021-08-07 03:15
关键词：
电工电子基础
电工电子技术
答案解析
A
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