载流导体短路时(或称为短时)发热，是指（）很短一段时间内导体发热的过程。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69241' and id < 4483390 and id<>'4483390' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69241' and id > 4483390 and id<>'4483390' order by id asc limit 5