n=l，2,3，*”，100时，rn/31共有（4)个不同的数（『al表示a的整数部分,例如[3.14]=3)9

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29739' and id < 2415590 and id<>'2415590' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29739' and id > 2415590 and id<>'2415590' order by id asc limit 5