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大全-19-15

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发表于 2004-4-15 09:42:00 | 显示全部楼层

大全-19-15

Over the last century, paleontologists have used small differences between fossil specimens to classify triceratops into sixteen species. This classification is unjustified, however, since the specimens used to distinguish eleven of the species come from animals that lived in the same area at the same time.



Which of the following, if true, would enable the conclusion of the argument to be properly drawn?



(A) Not every species that lived in a given area is preserved as a fossil.



(B) At least one individual of every true species of triceratops has been discovered as a fossil specimen.



(C) No geographical area ever supports more than three similar species at the same time.



(D) In many species, individuals display quite marked variation.C



(E) Differences between fossil specimens of triceratops that came from the same area are no less distinctive than differences between specimens that came from different areas


恳请指点题干说了什么?.





发表于 2004-4-15 11:08:00 | 显示全部楼层

过去分11种-->分16种不对


C说原来最多只能分3种,所以16种和11种都太荒唐了。

 楼主| 发表于 2004-4-15 11:30:00 | 显示全部楼层
偶怎么觉得:用来鉴别的标本中有11种来自一个地方,所以分出来16种不正确。(即标本没有说服力)c说一个地方只能由3个标本。
 楼主| 发表于 2004-4-15 11:32:00 | 显示全部楼层
不对,不对。是16个中有11个来自同一个地方。
 楼主| 发表于 2004-4-15 11:38:00 | 显示全部楼层
偶懂了,谢谢
发表于 2004-4-15 12:08:00 | 显示全部楼层

I think C is not correct because there is no evidence that the 11 species are similar. D is correct because it provides an explanation why the 11 specimens could represent fewer than 11 species - because individual of the same species can show variance.

Just want to make sure that you see the point here.

发表于 2004-4-15 17:10:00 | 显示全部楼层

欢迎总教头多来指点。

发表于 2004-4-15 21:35:00 | 显示全部楼层
对mindfree的解释有疑问:首先,这个species 和文中的species of triceratops是不一致的,其次 个体的差异很大未必是指在确定种类的某些特征上的差异,比如,人和猩猩差异大,但都是灵长目。而且这个解释和文章中对地点的提出没有给出很好的回应,我还是认为C更好。
发表于 2004-4-15 22:17:00 | 显示全部楼层

同意选C, 即使题目的意思不完全搞懂也可以定位在C

题目中结论是 the specimens used to distinguish eleven of the species come from animals that lived in the same area at the same time can't classify 16 different species只要选项能够支持为什么一个AREA 不能支持 classification for 16 different species 就可以了,  C最清楚的表明了这一点一个AREA连3个都不能支持.

D中的in MANY specifes 就是一个含糊的和本文无关的概念, 更看不出D和论证有什么直接关系

 楼主| 发表于 2004-4-15 22:38:00 | 显示全部楼层

不胜荣幸,有这么多大虾前来指点,感动ing. 我很注重看懂题目,看不懂就不会做,题目我看了很多次,我的翻译如下:


科学家利用标本的细微区别把t动物分成16种,但是这个分类是不对的,因为用于鉴别16种中的11种t动物的标本来自同一个地区同一时间。


c的意思是一个地方只能有不超过3 个种类,所以原文一个地方11种就不合理了,推出科学家的分类不对。


d我得再研究。 严重感谢众nn!

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