[求助]gwd逻辑题 与LAWYER的解释不一致

GMAT阿驴

以下是引用lawyer_1在2004-11-25 21:55:00的发言：

将E取非，在样品检验前F放金在样品中。这样F的样品含金高而实际不高的原因就不是方法不对了。结论说方法不对就不成立。故为假设。

易混的是D。好像也是排除他因。但原文说的是检验K岛的金含量。其他岛的情况无关。选D的原因在于认为F用其它岛的样品充当K岛样品。但原文没这层意思。

Frobisher, a sixteenth-century English explorer, had soil samples from LACE>CanadaLACE>’s LACE>LACENAME>KodlunarnLACENAME> LACETYPE>IslandLACETYPE>LACE> examined for gold content.  Because high gold content was reported, LACE>ElizabethLACE> 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?

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

但是原文都没有 加入GOLD的意思啊?

其实这种题就是要排除原文没有给出的原因吧

应该 D E 都是答案吧

请大家指正

yukovan

我的想法

测试结果不正确的原因可能有两个：

样品有问题

方法有问题

要得出方法有问题的结论，就必须先排出样品有问题的可能。