档案的基本作用是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29038' and id < 2364145 and id<>'2364145' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29038' and id > 2364145 and id<>'2364145' order by id asc limit 5