专家教师将练习看作是检查学生学习的手段，新教师仅仅是把它当作必经的步骤。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31751' and id < 2539347 and id<>'2539347' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31751' and id > 2539347 and id<>'2539347' order by id asc limit 5