og-51 , 这问题 没被解决掉。NN 帮帮

pengfei1102

OG-51：

51. Guitar strings often go “dead”—become less responsive and bright in tone—after a few weeks of intense use.

A researcher whose son is a classical guitarist hypothesized that dirt and oil, rather than changes in the material properties of the string, were responsible.

Which of the following investigations is most likely to yield significant information that would help to evaluate the researcher’s hypothesis?

(A) Determining if a metal alloy is used to make the strings used by classical guitarists

(B) Determining whether classical guitarists make their strings go dead faster than do folk guitarists

(C) Determining whether identical lengths of string, of the same gauge, go dead at different rates when strung on various brands of guitars.

(D) Determining whether a dead string and a new string produce different qualities of sound

(E) Determining whether smearing various substances on new guitar strings causes them to go dead

答案选E没有问题，但是想明确一下，

因为 OG这样解释：The hypothesis has two parts: first,that intense use does not bring material changes that cause the string to go dead and, second, that dirt and oil do cause the phenomenon.

则：这个答案对不对， Determining whether intense use of guita would lead to changes in the material properties of the string.若试验的结果是N,则为加强，若试验的结果是Y,并不是个削弱，请问这种类型的答案是对的吗？ 给出解释。谢谢。

yaoyao99

Having an experiment result of Y does weaken the argument, which states that the change in material property is not responsible for the final result.

pengfei1102

Which of the following investigations is most likely to yield significant information that would help to evaluate the researcher’s hypothesis

OG这样解释：The hypothesis has two parts: first,that intense use does not bring material changes that cause the string to go dead and, second, that dirt and oil do cause the phenomenon.

但是 感觉 这两个 方面 应都是 hypothesis 的一部分，

题目说：hypothesized that dirt and oil, rather than changes in the material properties of the string, were responsible.

所以 还是有些不清楚？

（f） Determining whether intense use of guita would lead to changes in the material properties of the string.

以下是引用yaoyao99在2006-5-2 8:30:00的发言：
Having an experiment result of Y does weaken the argument, which states that the change in material property is not responsible for the final result.

我认为 f 他 既可以 weaken， intense use of guita would lead to changges ，也可以 support , intense use of guita not lead to changes, but for other reasons ---maybe dirt and oil.   

难道 ，rather than changes in material properrties of the string 不是 他的一个hypothesis 吗？

still confusing

yaoyao99

"Rather than" means "not".

lawyer_1

同意yaoyao99。

因果关系题，作者在对果提出原因时，就是假定这是唯一原因。所以Intense use是因，则Oil and dirt就不会是因，反之亦然。

pengfei1102

谢谢 lawyer_1

因果关系题，作者在对果提出原因时，就是假定这是唯一原因-----------------------知道了。

KATIEUS