并列结合学习比上位学习和下位学习更简单容易。 （ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31722' and id < 2538851 and id<>'2538851' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31722' and id > 2538851 and id<>'2538851' order by id asc limit 5