契约型基金是基于（）而组织起来的代理投资方式。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30046' and id < 2433969 and id<>'2433969' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30046' and id > 2433969 and id<>'2433969' order by id asc limit 5