根据一节课所完成任务的类型数，可将课分为 （ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='26043' and id < 2184457 and id<>'2184457' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26043' and id > 2184457 and id<>'2184457' order by id asc limit 5