如图所示电路已达谐振状态，且的有效值均为1A，则的有效值为（   ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69470' and id < 4499522 and id<>'4499522' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69470' and id > 4499522 and id<>'4499522' order by id asc limit 5