若忽略变压器绕组内部的压降，变压器一、二次侧电压之比为一、二次侧绕组的

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30222' and id < 2444807 and id<>'2444807' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30222' and id > 2444807 and id<>'2444807' order by id asc limit 5