通过着丝粒连结的染色单体叫（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29827' and id < 2420810 and id<>'2420810' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29827' and id > 2420810 and id<>'2420810' order by id asc limit 5