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脊椎动物进化的历程大致是某些古代的鱼类→原始两栖类原始两栖类→原始爬行类原始爬行类→原始鸟类原始鸟类和原始哺乳类原始哺乳类． 题目和参考答案 Template






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sketch 5009 Elen Jager from Attack on Titan
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sketch 3242 Jolteon by Välë Chäpärrö Järämïllö
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tomski脊椎动物进化的历程大致是某些古代的鱼类→原始两栖类原始两栖类→原始爬行类原始爬行类→原始鸟类原始鸟类和原始哺乳类原始哺乳类． 题目和参考答案 coloring
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如图是动物进化的部分历程示意图请分析回答1写出图中字母所表示的动物类群名称A节肢动物B爬行类．2在脊椎动物中两栖动物具有 sketch template
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