关于蛋白质变性特征叙述正确的是：

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='21546' and id < 1873734 and id<>'1873734' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='21546' and id > 1873734 and id<>'1873734' order by id asc limit 5