变压器是由铁芯和套在铁芯上的两个互相绝缘的（ ）组成。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30222' and id < 2444806 and id<>'2444806' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30222' and id > 2444806 and id<>'2444806' order by id asc limit 5