正弦电路既有有功功率又有无功功率的是（   ）电路。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69471' and id < 4499942 and id<>'4499942' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69471' and id > 4499942 and id<>'4499942' order by id asc limit 5