根据（ ）的程度，公共物品可分为纯公共物品和准公共物品。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30641' and id < 2473485 and id<>'2473485' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30641' and id > 2473485 and id<>'2473485' order by id asc limit 5