标题: 求助就近原则问题,在线等! [打印本页] 作者: 谷雨书 时间: 2010-7-5 23:11 标题: 求助就近原则问题,在线等! Paleontologists believe that fragments of a primate jawbone (unearthed in Burma and estimated to be 40 to 44 million years old) provide evidence of a crucial step along the evolutionary path that led to human bedings.