图1-18所示电路中4A电流源发出的功率为 （）。 

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30079' and id < 2435291 and id<>'2435291' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30079' and id > 2435291 and id<>'2435291' order by id asc limit 5