三相短路实用计算的假设中，变压器变比为(  )。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69514' and id < 4503412 and id<>'4503412' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69514' and id > 4503412 and id<>'4503412' order by id asc limit 5