下列属于人体免疫器官的有（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31813' and id < 2542592 and id<>'2542592' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31813' and id > 2542592 and id<>'2542592' order by id asc limit 5