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标题: LSAT-2-4-8 请教 [打印本页]

作者: flyingceleste 时间: 2005-1-30 17:23
标题: LSAT-2-4-8 请教

8. Measurements of the extent of amino-acid decomposition in fragments of eggshell found at archaeological sites in such places as southern Africa can be used to obtain accurate dates for sites up to 200,000 years old. Because the decomposition is slower in cool climates, the technique can be used to obtain accurate dates for sites almost a million years old in cooler regions.

The information above provides the most support for which one of the following conclusions?

(A) The oldest archaeological sites are not in southern Africa, but rather in cooler regions of the world.

(B) The amino-acid decomposition that enables eggshells to be used in dating does not take place in other organic matter found at ancient archaeological sites.

(C) If the site being dated had been subject to large unsuspected climatic fluctuations during the time the eggshell has been at the site, application of the technique is less likely to yield accurate results.

(D) After 200,000 ears in a cool climate, less than one-fifth of the amino acids in a fragment of eggshell that would provide material for dating with the technique will have decomposed and will thus no longer be suitable for examination by the technique.

(E) Fragments of eggshell are more likely to be found at ancient archaeological sites in warm regions of the world than at such sites in cooler regions.

我看到有大虾说过，做题目的时候要把自己当作idiot，我不觉得这里隐含了气候比较稳定的说法啊，原文倒是提到the decomposition is slower in cool climates, .

所以我觉得E对

[此贴子已经被作者于2005-1-30 17:23:30编辑过]

作者: lawyer_1 时间: 2005-1-30 21:55

1。原文用比较句slower in cool climates是和温度较高的climate比。所以如果温度忽高忽低，那麽分解应该是相对快还是慢呢？

2。蛋壳碎片在哪里容易发现，依我看在鸡多的地方最容易发现。这很显然是个无聊的选项。

作者: flyingceleste 时间: 2005-1-31 20:38

以下是引用lawyer_1在2005-1-30 21:55:00的发言：

2。蛋壳碎片在哪里容易发现，依我看在鸡多的地方最容易发现。

[此贴子已经被作者于2005-1-31 20:51:38编辑过]

作者: seekmydream 时间: 2005-1-31 23:25

mm最好把参考答案附上.

我认为选C. 傻子原则是指原文没提到的信息被认为是不可知的,不要用自己的,题目以外的常识作判断.

原文给的信息有两点:

1.在暖的地方这种方法可测到最多20万年的时间

2.在冷的地方由于分解慢可测到大约100万年的时间.

从这些信息可知,在气候变化大的地方,分解的速度忽快忽慢, 测得的时间自然也不可能准确了.

E说的是样本在哪里找到,是无关信息.

作者: xjlv128 时间: 2006-3-18 10:15

以下是引用seekmydream在2005-1-31 23:25:00的发言：.

原文给的信息有两点:

1.在暖的地方这种方法可测到最多20万年的时间

2.在冷的地方由于分解慢可测到大约100万年的时间.

从这些信息可知,在气候变化大的地方,分解的速度忽快忽慢, 测得的时间自然也不可能准确了.

E说的是样本在哪里找到,是无关信息.

太清楚了！

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