小刘在超市买一瓶香油付了人民币25元，在这里，人民币履行的职能是(

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31477' and id < 2523106 and id<>'2523106' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31477' and id > 2523106 and id<>'2523106' order by id asc limit 5