质权自质押合同订立时设立（   ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='9314' and id < 755544 and id<>'755544' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='9314' and id > 755544 and id<>'755544' order by id asc limit 5