一个6条支路，（   ）个结点的电路中，需要列3个回路电流方程。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68474' and id < 4421075 and id<>'4421075' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68474' and id > 4421075 and id<>'4421075' order by id asc limit 5