三相电路只要作Y形连接，则线电压在数值上是相电压的倍。（   ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69389' and id < 4493041 and id<>'4493041' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69389' and id > 4493041 and id<>'4493041' order by id asc limit 5