一个具有4个节点和6条支路的电路，有（   ）个网孔电流。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69305' and id < 4487131 and id<>'4487131' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69305' and id > 4487131 and id<>'4487131' order by id asc limit 5