无备用接线适用于二级负荷，不适用于一级负荷占很大的场合。(  )

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69509' and id < 4503129 and id<>'4503129' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69509' and id > 4503129 and id<>'4503129' order by id asc limit 5