如图所示电路，2A电流源的发出功率为（   ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69349' and id < 4489460 and id<>'4489460' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69349' and id > 4489460 and id<>'4489460' order by id asc limit 5