题目内容
以下哪项因素不能引起外部学习动机？（ ）
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SQL Error: select id,body,options from ***_enewstiku where sourceid='30951' and id < 2491822 and id<>'2491822' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30951' and id > 2491822 and id<>'2491822' order by id asc limit 5