学生的知识学习同教师表达的清晰度（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32294' and id < 2569659 and id<>'2569659' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32294' and id > 2569659 and id<>'2569659' order by id asc limit 5