在学习较复杂的内容时，动机水平（ ）时最有利于学习。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30603' and id < 2469236 and id<>'2469236' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30603' and id > 2469236 and id<>'2469236' order by id asc limit 5