RL串联的正弦电路中,端口电压 U=UR+UL 。(     )

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68473' and id < 4421044 and id<>'4421044' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68473' and id > 4421044 and id<>'4421044' order by id asc limit 5