教学设计的基本要素有（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31744' and id < 2539246 and id<>'2539246' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31744' and id > 2539246 and id<>'2539246' order by id asc limit 5