关于脊椎动物亚门的几个问题脊椎动物亚门各纲动物适应的环境及相应的特征.(昆虫)、鱼类、鸟类、哺乳类种类繁多的原因.两栖动物的适应生活的矛盾性(哪些特征适应陆生,哪些特征离
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![关于脊椎动物亚门的几个问题脊椎动物亚门各纲动物适应的环境及相应的特征.(昆虫)、鱼类、鸟类、哺乳类种类繁多的原因.两栖动物的适应生活的矛盾性(哪些特征适应陆生,哪些特征离](/uploads/image/z/9904646-38-6.jpg?t=%E5%85%B3%E4%BA%8E%E8%84%8A%E6%A4%8E%E5%8A%A8%E7%89%A9%E4%BA%9A%E9%97%A8%E7%9A%84%E5%87%A0%E4%B8%AA%E9%97%AE%E9%A2%98%E8%84%8A%E6%A4%8E%E5%8A%A8%E7%89%A9%E4%BA%9A%E9%97%A8%E5%90%84%E7%BA%B2%E5%8A%A8%E7%89%A9%E9%80%82%E5%BA%94%E7%9A%84%E7%8E%AF%E5%A2%83%E5%8F%8A%E7%9B%B8%E5%BA%94%E7%9A%84%E7%89%B9%E5%BE%81.%EF%BC%88%E6%98%86%E8%99%AB%EF%BC%89%E3%80%81%E9%B1%BC%E7%B1%BB%E3%80%81%E9%B8%9F%E7%B1%BB%E3%80%81%E5%93%BA%E4%B9%B3%E7%B1%BB%E7%A7%8D%E7%B1%BB%E7%B9%81%E5%A4%9A%E7%9A%84%E5%8E%9F%E5%9B%A0.%E4%B8%A4%E6%A0%96%E5%8A%A8%E7%89%A9%E7%9A%84%E9%80%82%E5%BA%94%E7%94%9F%E6%B4%BB%E7%9A%84%E7%9F%9B%E7%9B%BE%E6%80%A7%EF%BC%88%E5%93%AA%E4%BA%9B%E7%89%B9%E5%BE%81%E9%80%82%E5%BA%94%E9%99%86%E7%94%9F%2C%E5%93%AA%E4%BA%9B%E7%89%B9%E5%BE%81%E7%A6%BB)
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