线损是指电能从发电厂到用户的输送过程中不可避免地发生(  )的损失。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69509' and id < 4503112 and id<>'4503112' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69509' and id > 4503112 and id<>'4503112' order by id asc limit 5