( )指将课程内容按照由浅人深、由易到 难的原则，在逻辑上前后联系，直线推进、不重复地 进行排列。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='26043' and id < 2184374 and id<>'2184374' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26043' and id > 2184374 and id<>'2184374' order by id asc limit 5