GWD13-38再开贴，求解答

maggie0406

T-4-Q14 GWD-13-38

Frobisher, a sixteenth-century English explorer, had soil samples from Canada’s Kodlunarn Island examined for gold content.  Because high gold content was reported, Elizabeth I funded two mining expeditions.  Neither expedition found any gold there.  Modern analysis of the island’s soil indicates a very low gold content.  Thus the methods used to determine the gold content of Frobisher’s samples must have been inaccurate.
Which of the following is an assumption on which the argument depends?

A.      The gold content of the soil on Kodlunarn Island is much lower today than it was in the sixteenth century.
B.       The two mining expeditions funded by Elizabeth I did not mine the same part of Kodlunarn Island.
C.      The methods used to assess gold content of the soil samples provided by Frobisher were different from those generally used in the sixteenth century.
D.      Frobisher did not have soil samples from any other Canadian island examined for gold content.
E.       Gold was not added to the soil samples collected by Frobisher before the samples were examined.

答案是E，我选B，E的答案我不否认，但是为什么B不对

对B取非，两个远征队在CK岛的同一个地方开采，也许他们开采的那个地方没有金子，但是岛上其他地方可能有金子啊

xiaoyejv

楼主，注意结论， the methods used to determine the gold content of Frobisher’s samples must have been inaccurate.
把B取非了，在同一个地方开采与method的正确性有关么？再说逻辑题是要我们找出最好的答案，E很直接的就排除他因，应该比B要优吧。

maggie0406

lz的意思是
B也有道理
但是E更直接？

stavan

此题B没有道理, assumption题目, 一定要找到结论,
这个题目有一个小陷阱, 解释一下:

前提
1. F的样本检测金含量高
2. 现代分析金含量低

结论
F所用的金含量检查方法是不准确的

那么那两只探险队是干啥用的? 小陷阱
其实是用来间接证明 前提2: 现代分析金含量低 的, 本身就和结论没有什么关系
就算按照LZ所说的取非, 探险队没找对地方, 也不能说明F的检查方法就对了
有没有探险队, 都不会对结论产生影响, 因此B不是必要假设

其实B可以用无关排除, 因为没有涉及到方法
而且这个题目一看推理思路, 就应该知道答案大概长什么样子了:
1. 要么说F的样本和现代样本有可比性, 比如E的说法, 或者说什么不是因为水土流失什么导致样本不可比之类的
2. 要么说现代方法是正确的, 当然, 这种方法太直白, 估计很少会遇到, 除非题目太简单

stavan

我晕...怎么现在头衔变成新手上路了...呵呵

maggie0406

那按照stavan所说
描述探险队就是没用吗，只是一个陷阱，那etsi也太奸诈了吧
呵呵
还有
一看题就知道答案大致长什么样
这样的境界我肯定是达不到的