从第一期起，在一定时期内每期期初等额收付的系列款项称为

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SQL Error: select id,body,options from ***_enewstiku where sourceid='28613' and id < 2336251 and id<>'2336251' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28613' and id > 2336251 and id<>'2336251' order by id asc limit 5