如图为动植物进化的大致历程请据图回答下列问题1图中a是指原始生�.2从图中可以看出鸟类哺乳类都是由b古代爬行类进化而来的 Template




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tomski如图为动植物进化的大致历程请据图回答下列问题1图中a是指原始生�.2从图中可以看出鸟类哺乳类都是由b古代爬行类进化而来的 coloring