用网孔分析法计算图示电路中的网孔电流i为（）。 

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32670' and id < 2598712 and id<>'2598712' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32670' and id > 2598712 and id<>'2598712' order by id asc limit 5