现代生物技术的核心是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29954' and id < 2428268 and id<>'2428268' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29954' and id > 2428268 and id<>'2428268' order by id asc limit 5