中学生甲，15周岁，如果实施下列行为，应当负刑事责任的是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='28406' and id < 2321340 and id<>'2321340' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28406' and id > 2321340 and id<>'2321340' order by id asc limit 5