DNA复制时需要的RNA引物是由（ ）催化合成的。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29827' and id < 2420850 and id<>'2420850' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29827' and id > 2420850 and id<>'2420850' order by id asc limit 5