图2-25电路中，U、I均为正值，其工作状态是（）。 

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30079' and id < 2435270 and id<>'2435270' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30079' and id > 2435270 and id<>'2435270' order by id asc limit 5