鉴别二甲醚和乙醇可采用化学方法或物理方法，下列方法不能对二者进行鉴别的是

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='21881' and id < 1912587 and id<>'1912587' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='21881' and id > 1912587 and id<>'1912587' order by id asc limit 5