单价合同可分为固定单价合同和变动单价合同，下列说法正确的有（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25978' and id < 2180506 and id<>'2180506' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25978' and id > 2180506 and id<>'2180506' order by id asc limit 5