()的电机，在通电前，必须先做各绕组的绝缘电阻检査，合格后才可通电。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='27222' and id < 2260160 and id<>'2260160' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27222' and id > 2260160 and id<>'2260160' order by id asc limit 5