二维随机变量的联合分布律为则=(    )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='8559' and id < 692016 and id<>'692016' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='8559' and id > 692016 and id<>'692016' order by id asc limit 5