对称负载星形联结时，线电压是相电压的倍，且相位滞后相应的相电压30°。（   ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69389' and id < 4493060 and id<>'4493060' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69389' and id > 4493060 and id<>'4493060' order by id asc limit 5