题目内容
电机和变压器常用的铁芯材料为软磁材料。( )
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69323' and id < 4487996 and id<>'4487996' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69323' and id > 4487996 and id<>'4487996' order by id asc limit 5