dna分子结构主要特点 1dna分子是由 条 长链盘旋而成的 结构 2 交替连接排列在外侧构成基本骨架 在内侧 3两条链 Template




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Try and sketch some of theseStore, Road, Scale, Lei, Dog Catcher, Guard, Yo-yo, Seamstress, Sumo wrestler, Stethoscope, view more ideas


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tomskidna分子结构主要特点 1dna分子是由 条 coloring