已知某电路的电压相量，电流相量，则电路的有功功率P为（   ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69471' and id < 4499926 and id<>'4499926' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69471' and id > 4499926 and id<>'4499926' order by id asc limit 5