. 数字签名技术不可以解决的鉴别问题是

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='55105' and id < 3474902 and id<>'3474902' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='55105' and id > 3474902 and id<>'3474902' order by id asc limit 5