下列对“关键期”理解不正确的一项是( )

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25993' and id < 2181507 and id<>'2181507' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25993' and id > 2181507 and id<>'2181507' order by id asc limit 5