下列属于课程表安排应遵循的原则的是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30347' and id < 2452779 and id<>'2452779' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30347' and id > 2452779 and id<>'2452779' order by id asc limit 5