从课程功能的角度，可把课程分为 （ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29322' and id < 2386868 and id<>'2386868' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29322' and id > 2386868 and id<>'2386868' order by id asc limit 5