Q61. (by 涵庚茜尼) 考古学家挖骨头，挖出了一块神马骨头是至少1400岁，就断定这里曾经跟大陆之间有passage ，因为在1180年到1800年之前passage 已经被证明不存在，所以这块骨头是1800年之前的，求加强我忘了我选的毛了 考古： V1 似乎是有道题目的变体：在某个离阿拉斯加2000英里的地方有个发掘人类11200年遗迹，但是阿拉斯加那个桥什么的在18000和11000年之间是不通的，结论是科学家说人类在18000年之前就来美洲了。问假设。 我选的是阿拉斯加的桥随着大陆板块变动会浮出水面。 疑似GWD-11-Q41: Charcoal from a hearth site in Colorado,2,000 miles south of Alaska,is known tobe 11,200 years old. Researchers reasoned that, since glaciers prevented humanmigrationsouth from the Alaska-Siberia land bridge between 18,000 and 11,000years ago,humans must have come to the Americasmore than 18,000 years ago. Which of the following pieces of new evidence would cast doubt on theconclusiondrawn above? A. Using newradiocarbon dating techniques, it was determined that thecharcoal from the Colorado site was atleast 11,400 years old. B. Another campsitewas found in New Mexicowith remains dated at 16,000years old. C. A computersimulation of glacial activity showed that it would alreadyhave beenimpossible for humans to travel south overland from Alaska 18,500 years ago. D. Using new radiocarbon dating techniques, it was provedthat an ice-free corridor allowed passage south from the Alaska-Siberia landbridge at least 11,400 years ago. E. Studies ofvarious other hunting-gathering populations showedconvincingly that, once theglaciers allowed passage, humans could have migratedfrom Alaska to Colorado inabout 20 years.
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发表于 2011-10-16 17:20:08
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