教学过程是由（ ）共同组成的双边活动。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30349' and id < 2452827 and id<>'2452827' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30349' and id > 2452827 and id<>'2452827' order by id asc limit 5