2 x 2－5 x－3＜0的一个必要不充分条件是（  ）     

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19888' and id < 1728986 and id<>'1728986' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19888' and id > 1728986 and id<>'1728986' order by id asc limit 5