马克思认为，复杂劳动等于加倍的简单劳动。这主要说明教育具有哪种功能（ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25980' and id < 2180707 and id<>'2180707' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25980' and id > 2180707 and id<>'2180707' order by id asc limit 5