丹顶鹤的组又细又长,鸡的足较粗壮,鸭的足上长有蹼.这些动物的足差别很大,这同他们的生活环境有什么关系?
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![丹顶鹤的组又细又长,鸡的足较粗壮,鸭的足上长有蹼.这些动物的足差别很大,这同他们的生活环境有什么关系?](/uploads/image/z/7116836-68-6.jpg?t=%E4%B8%B9%E9%A1%B6%E9%B9%A4%E7%9A%84%E7%BB%84%E5%8F%88%E7%BB%86%E5%8F%88%E9%95%BF%2C%E9%B8%A1%E7%9A%84%E8%B6%B3%E8%BE%83%E7%B2%97%E5%A3%AE%2C%E9%B8%AD%E7%9A%84%E8%B6%B3%E4%B8%8A%E9%95%BF%E6%9C%89%E8%B9%BC.%E8%BF%99%E4%BA%9B%E5%8A%A8%E7%89%A9%E7%9A%84%E8%B6%B3%E5%B7%AE%E5%88%AB%E5%BE%88%E5%A4%A7%2C%E8%BF%99%E5%90%8C%E4%BB%96%E4%BB%AC%E7%9A%84%E7%94%9F%E6%B4%BB%E7%8E%AF%E5%A2%83%E6%9C%89%E4%BB%80%E4%B9%88%E5%85%B3%E7%B3%BB%3F)
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