为研究细菌的生长将在含轻氮同位素14n的培养基上培养多代的细菌转移到含重氮同位素15n的培养基上繁殖一代再转移到含14n的培养基上继续生长 Template




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tomski为研究细菌的生长将在含轻氮同位素14n的培养基上培养多代的细菌转移到含重氮同位素15n的培养基上繁殖一代再转移到含14n的培养基上继续生长 coloring