不等式x 2＋ax＋4<0的解集不是空集，则实数a的取值范围是(　　)

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='15531' and id < 2638698 and id<>'2638698' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='15531' and id > 2638698 and id<>'2638698' order by id asc limit 5