直线l：A x+B y+C＝0过一、二、四象限，坐标原点O(0，0)与点M(m，n)同在直线l的左下方，则A m+B n+C的值

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='32832' and id < 2617678 and id<>'2617678' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='32832' and id > 2617678 and id<>'2617678' order by id asc limit 5