当电阻R上的u、i参考方向为非关联时，欧姆定律的表达式应为（）.

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32669' and id < 2598588 and id<>'2598588' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32669' and id > 2598588 and id<>'2598588' order by id asc limit 5