脐带脱垂的定义是指(       )

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SQL Error: select id,body,options from ***_enewstiku where sourceid='26888' and id < 2234211 and id<>'2234211' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26888' and id > 2234211 and id<>'2234211' order by id asc limit 5