智力低下的诊断标准为智商低于（ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25670' and id < 2157454 and id<>'2157454' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25670' and id > 2157454 and id<>'2157454' order by id asc limit 5