学习策略是学习者制订的学习计划，由（ ）构成。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27762' and id < 2283197 and id<>'2283197' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27762' and id > 2283197 and id<>'2283197' order by id asc limit 5