下列关于基因工程的叙述正确的是 A基因工程经常以抗菌素抗性基因为目的基因 b细菌质粒是基因工程常用的运载体 c通常用一种限制性 Template




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tomski下列关于基因工程的叙述正确的是 a基因工程经常以抗菌素抗性基因为目的基因 b细菌质粒是基因工程常用的运载体 coloring