椎间盘中最易发生退变的结构为（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25681' and id < 2159174 and id<>'2159174' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25681' and id > 2159174 and id<>'2159174' order by id asc limit 5