根据网孔电流法求解电压U（）。 

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32670' and id < 2598727 and id<>'2598727' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32670' and id > 2598727 and id<>'2598727' order by id asc limit 5