结点电压法对B结点列写电压方程应该是（）。 

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32670' and id < 2598642 and id<>'2598642' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32670' and id > 2598642 and id<>'2598642' order by id asc limit 5