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地球上最古老的岩石:来自加拿大西北地区的40亿年前的花岗岩。鸣谢:李教授课题组神秘的地球uux.cn)据中国科学院李源):地球是目前已知的唯一一个孕育生命的星球——这在很大程度上要归功于板块构造的运作http://www.hwenz.com/pic/细辟人逝世哲理文章中国最好十大年夜散文励志的人逝世哲理好文.jpg...
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