图示电路中，5A电流源提供的功率为（）。 

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32671' and id < 2598872 and id<>'2598872' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32671' and id > 2598872 and id<>'2598872' order by id asc limit 5