学习负担是客观存在的，没有负担就没有学习质量可言，负担越重，学习成绩越好。( )

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31718' and id < 2538806 and id<>'2538806' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31718' and id > 2538806 and id<>'2538806' order by id asc limit 5