存单的性质属于()，即用来证明存款人与存款机构之间约定的存在。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='54704' and id < 3445373 and id<>'3445373' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='54704' and id > 3445373 and id<>'3445373' order by id asc limit 5