蛋白质结构的不同级别由下列键的类型决定，除了（）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30525' and id < 2464959 and id<>'2464959' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30525' and id > 2464959 and id<>'2464959' order by id asc limit 5