电路如图所示，Us=2V,4=2/1。电阻^和/?2消耗的功率由（）供给。 

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='32627' and id < 2594475 and id<>'2594475' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32627' and id > 2594475 and id<>'2594475' order by id asc limit 5