信托行为建立的前提和基础是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25448' and id < 2143378 and id<>'2143378' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25448' and id > 2143378 and id<>'2143378' order by id asc limit 5