【Daily Problem No.359】2218年11月26日
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Этот пост последний раз был отредактирован Green Lotus 21 26 228年11月26日 判断题（） 请在两日内作答。
【Daily Problem No.351】12月26日 交流电的有效值是根据电流的热效应来规定的。 判断题（正确） 请在两日内作答。
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