下图所示电路处于谐振状态时，电压表7的读数应是（）。 

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32632' and id < 2594811 and id<>'2594811' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32632' and id > 2594811 and id<>'2594811' order by id asc limit 5