为什么看树年轮就知道它活了有多久了呢?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/17 22:32:25
![为什么看树年轮就知道它活了有多久了呢?](/uploads/image/z/14828752-64-2.jpg?t=%E4%B8%BA%E4%BB%80%E4%B9%88%E7%9C%8B%E6%A0%91%E5%B9%B4%E8%BD%AE%E5%B0%B1%E7%9F%A5%E9%81%93%E5%AE%83%E6%B4%BB%E4%BA%86%E6%9C%89%E5%A4%9A%E4%B9%85%E4%BA%86%E5%91%A2%3F)
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