下图电路中，电压有效值则=（）Ω。 

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32673' and id < 2599082 and id<>'2599082' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32673' and id > 2599082 and id<>'2599082' order by id asc limit 5