长期发热是导体在（）状态下由工作电流产生的发热。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69241' and id < 4483386 and id<>'4483386' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69241' and id > 4483386 and id<>'4483386' order by id asc limit 5