题目内容
若电压其中ω=103rad/s,则电压u的有效值为()V。
2021-01-08
A.
B.
C.
D.
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='32677' and id < 2599430 and id<>'2599430' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32677' and id > 2599430 and id<>'2599430' order by id asc limit 5