大肠埃希菌核糖体大亚基的沉降系数是（    ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27516' and id < 2271409 and id<>'2271409' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27516' and id > 2271409 and id<>'2271409' order by id asc limit 5