RLC串联电路发生谐振时电路的功率因数（）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='32632' and id < 2594820 and id<>'2594820' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32632' and id > 2594820 and id<>'2594820' order by id asc limit 5