早晨的学习效果一般较好，这是因为这一阶段学习不受 干扰。（ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27168' and id < 2250942 and id<>'2250942' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27168' and id > 2250942 and id<>'2250942' order by id asc limit 5