.根据课程的固有属性，可将课程分为（ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='26042' and id < 2184331 and id<>'2184331' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26042' and id > 2184331 and id<>'2184331' order by id asc limit 5