提出经典条件反射作用理论的是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32266' and id < 2568697 and id<>'2568697' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32266' and id > 2568697 and id<>'2568697' order by id asc limit 5