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标题: LR9210-1-17 [打印本页]

作者: sevfye 时间: 2009-6-27 13:07
标题: LR9210-1-17
Samples from the floor of a rock shelter in Pennsylvania were dated by analyzing the carbon they contained. The dates assigned to samples associated which human activities formed a consistent series, beginning with the present and going back in time, a series that was correlated with the depth from which the samples came. The oldest and deepest sample was dated at 19,650 years before the present, plus or minus 2,400 years. Skeptic, viewing that date of human migration into North America, suggested that the samples could have been contaminated by dissolved "old carbon" carried by percolating groundwater from nearby coal deposits.

Which one of the following considerations, if true, argues most strongly against the suggestion of the skeptics?

(A) No likely mechanism of contamination involving percolating groundwater would have affected the deeper samples from the site without affecting the uppermost sample.

不明白的地方是：skeptic 是怎么得出结论的？为什么说有污染呢？＂viewing that date of human migration into North America＂　就代表两个日期不一样？

作者: crusoecrusoe 时间: 2009-6-27 15:11

你的三个问题。

（1）因为date of human migration into North America,所以 suggested that the samples could have been contaminated by dissolved "old carbon" carried by percolating groundwater from nearby coal deposits

（2）因为The oldest and deepest sample was dated at 19,650 years before the present，而date of human migration into North America，所以the samples could have been contaminated by dissolved "old carbon" carried by percolating groundwater from nearby coal deposits.

（3）你不必argue题目中的知识，只需要承认题目中确定的就好。

作者: sevfye 时间: 2009-6-27 15:19
（2）因为The oldest and deepest sample was dated at 19,650 years before the
present，而date of human migration into North America，所以the samples could
have been contaminated by dissolved "old carbon" carried by percolating
groundwater from nearby coal deposits.

＂而date of human migration into North America，＂这是一句话吗？

　　我怎么觉得skepic 也没说date of human migration into North America是什么时候？难道date不是名词在这儿？

作者: crusoecrusoe 时间: 2009-6-27 15:23

Two different dates.

By the way, you should know why you need to ask these questions rather than get better understanding of the precise content of every aspects of stimulus.Because some parts that you should not have to analysis.

作者: sevfye 时间: 2009-6-27 15:45
For this question, one can pick out the correct answer by eliminating all other four irrelevant choices. But, without knowing the explicit meaning of the premises and conclusion, it is not easy to get the correct answer by the first glance.
And, there is always a high risk of getting the wrong choice in many other situations in lr without knowing exactly what the author is saying. So,..., ....,....., i still want to know.....

作者: crusoecrusoe 时间: 2009-6-27 16:12

做题就像“杀猪”，哪里是肥肉，哪里是精肉，从哪里下刀，留下哪些部分，抛弃哪些地方，这很重要。

做题是命题者的意志，而你要读懂他的意志就好。

当然，你要读懂每一个部分，自然最好，我只是说可以有侧重和目的罢了呵呵

作者: sevfye 时间: 2009-7-1 11:21
好，我仔细体会一下“杀猪论"的运用。只是平时练习的时候还是好像弄明白每句话哦。

作者: 梅花兔 时间: 2009-7-9 16:49
好吧~~sevfye老兄~~如果你非要弄明白哩~~Skeptic, [viewing that date of human migration into North America], suggested that…[]就是一个插入的伴随嘛~~也没什么可纠结滴~~
还有我不得不说~~Crusoe你好萌~~

作者: crusoecrusoe 时间: 2009-7-9 18:15
　　萌　bud　germinate　sprout

　　méng　ㄇㄥˊ

　　植物的芽：～蘖。

　　发芽，开始发生：～生。～发。～芽。～动。故态复～。

　　 <古>又同“氓”（méng）。

作者: 梅花兔 时间: 2009-7-10 12:57
怎么办~~我觉得你更萌了~~
“萌”呢在这里作为形容词大概可以解释为“可爱”吧~~来自于日本动漫~~主要是我们宿舍有两个元火动漫协会的~~在不知不觉中这已经成为我们的日常用语了~~

作者: crusoecrusoe 时间: 2009-7-10 21:11

啊原来是传说中的“黑话”，不过，谢谢。（P.S. 忍法：考试满分之术）

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