对称三相电路由电阻组成，线电压为100V，线电流为1

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69472' and id < 4499997 and id<>'4499997' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69472' and id > 4499997 and id<>'4499997' order by id asc limit 5