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标题: GWD-11-Q41 这题结论到底指什么 [打印本页]

作者: dreamroad 时间: 2009-11-26 22:49
标题: GWD-11-Q41 这题结论到底指什么

?GWD-11-Q41:
?Charcoal from a hearth site in Colorado, 2,000 miles south of Alaska, is known to be 11,200 years old. Researchers reasoned that, since glaciers prevented human migration south from the Alaska-Siberia land bridge between 18,000 and 11,000 years ago, humans must have come to the Americas more than 18,000 years ago.
?Which of the following pieces of new evidence would cast doubt on the conclusion drawn above?
A.Using new radiocarbon dating techniques, it was determined that the charcoal from the Colorado site was at least 11,400 years old. B.Another campsite was found in New Mexico with remains dated at 16,000 years old. C.A computer simulation of glacial activity showed that it would already have been impossible for humans to travel south overland from Alaska 18,500 years ago. D.Using new radiocarbon dating techniques, it was proved that an ice-free corridor allowed passage south from the Alaska-Siberia land bridge at least 11,400 years ago. E.Studies of various other hunting-gathering populations showed convincingly that, once the glaciers allowed passage, humans could have migrated from Alaska to Colorado in about 20 years.
看到有不同的说法，有的说第一句是结论，但大部分人说最后是结论，请问到底哪个是结论呢

作者: dreamroad 时间: 2009-11-26 22:52
标题: GWD-11-Q41 这题结论到底指什么
不好意思，上面那个太乱了，重新发下

GWD-11-Q41

Charcoal from a hearth site in Colorado, 2,000 miles south of Alaska, is known to be 11,200 years old. Researchers reasoned that, since glaciers prevented human migration south from the Alaska-Siberia land bridge between 18,000 and 11,000 years ago, humans must have come to the Americas more than 18,000 years ago.

Which of the following pieces of new evidence would cast doubt on the conclusion drawn above?

A.Using new radiocarbon dating techniques, it was determined that the charcoal from the Colorado site was at least 11,400 years old.
B.Another campsite was found in New Mexico with remains dated at 16,000 years old.
C.A computer simulation of glacial activity showed that it would already have been impossible for humans to travel south overland from Alaska 18,500 years ago.
D.Using new radiocarbon dating techniques, it was proved that an ice-free corridor allowed passage south from the Alaska-Siberia land bridge at least 11,400 years ago.
E.Studies of various other hunting-gathering populations showed convincingly that, once the glaciers allowed passage, humans could have migrated from Alaska to Colorado in about 20 years.

作者: netbanker 时间: 2009-11-27 04:21
答案是C？

作者: dreamroad 时间: 2009-11-27 11:26
答案是D哦

作者: kathy1989717 时间: 2010-3-18 01:32
evidence1：Charcoal from a hearth site in Colorado, 2,000 miles south of Alaska, is known to be 11,200 years old.
evidence2：glaciers prevented human migration south from the Alaska-Siberia land bridge between 18,000 and 11,000 years ago
conclusion： humans must have come to the Americas more than 18,000 years ago

-------------------------------------------------翻译中文----------------------------------------------------
1.木炭（发现的遗址地--colorado）有11200年历史了
2.冰川阻止人们南迁在18000-11000年以前

结论：故，人类肯定是在18000年以前到达美国的。

问weaken。

作者: mdautobox 时间: 2011-6-9 18:46
B 说another 是无关选项
E 说 in 20years 也是五官选项
A 中强调是charcoal 不是结论部分
总上CD是相关选项
C说18000之前就不能通过了~~
D说在18000和11000之间可以通过~~~
所以D更好的反驳的结论~~C直接把人类通过的可能性都给弄没了

作者: lala974 时间: 2011-6-16 06:10
up up

作者: viridian 时间: 2011-6-29 16:42
EVIDENCE1 在阿拉斯加南部发现人类使用过的炭有11200年历史
EVIDENCE2 从西伯利亚通往阿拉斯加的大陆桥从 18000年到11000年是不能用的

CONCLUSION 人类在18000年以前就已经去到了阿拉斯加

A选项说炭其实应该有11400年历史对结论没有影响
B选项说的是一个无关事项。。
C选项补充EVIDENCE2说其实18500年前就不能用了对结论没有重大影响
D选项发现一个通道使得人类至少可以在11400年以前从西伯利亚到阿拉斯加推翻了结论18000年以前的论断应该为正确选项
E选项无关事项

作者: icever 时间: 2012-5-12 20:24

nice
EVIDENCE1 在阿拉斯加南部发现人类使用过的炭有11200年历史
EVIDENCE2 从西伯利亚通往阿拉斯加的大陆桥从 18000年到11000年是不能用的

CONCLUSION 人类在18000年以前就已经去到了阿拉斯加

A选项说炭其实应该有11400年历史对结论没有影响
B选项说的是一个无关事项。。
C选项补充EVIDENCE2说其实18500年前就不能用了对结论没有重大影响
D选项发现一个通道使得人类至少可以在11400年以前从西伯利亚到阿拉斯加推翻了结论18000年以前的论断应该为正确选项
E选项无关事项

-- by 会员 viridian (2011/6/29 16:42:32)

作者: niclively 时间: 2014-2-13 21:41

mdautobox 发表于 2011-6-9 18:46
B 说another  是无关选项E 说  in 20years 也是五官选项A 中强调是charcoal  不是结论部分 ...

goooooood!!!!!!!!!!!!!!!!

作者: mike02067 时间: 2014-7-12 05:58
答案选 D ...
答案 C 的问题在于：人们不仅能通过选项中所说的北极冰桥来到美洲，也可能通过其他途径到达美洲。这是逻辑漏洞。

作者: Hendy 时间: 2015-2-4 09:06
niceeeeeeeeeeeeeeeeeeeeeeee

作者: jingliu097 时间: 2015-5-31 17:35
11楼CD搞混了啊

作者: newconcept123 时间: 2016-2-16 03:14
I use timeline in Math to solve this question,
check the picture, author is talking about charcoal and human migration on different timeline.
So, if we can figure out the what happened at what time
the argument will be much easier for us.

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