请教大家！！ GWD-29-Q27,关于zinc那道题，想不明白=_=!

yeefay

38: GWD-29-Q27

Though sucking zinc lozenges has been promoted as a treatment for the common cold, research has revealed no consistent effect.  Recently, however, a zinc gel applied nasally has been shown to greatly reduce the duration of colds.  Since the gel contains zinc in the same form and concentration as the lozenges, the greater effectiveness of the gel must be due to the fact that cold viruses tend to concentrate in the nose, not the mouth.

In order to evaluate the argument, it would be most helpful to determine which of the following?

A.        Whether zinc is effective only against colds, or also has an effect on other virally caused diseases

B.         Whether there are remedies that do not contain zinc but that, when taken orally, can reduce the duration of colds

C.       Whether people who frequently catch colds have a zinc deficiency

D.        ★Whether either the zinc gel or the lozenges contain ingredients that have an impact on the activity of the zinc

E.         Whether the zinc gel has an effect on the severity of cold symptoms, as well as on their duration

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[此贴子已经被作者于2008-12-10 11:35:30编辑过]

zhizhe

Since the gel contains zinc in the same form and concentration as the lozenges, the greater effectiveness of the gel must be due to the fact that cold viruses tend to concentrate in the nose, not the mouth,这句话是解题目的关键，这道题目属于排除他因，的确挺饶的

raiden_lee

以下是引用zhizhe在2008-12-10 14:41:00的发言：
Since the gel contains zinc in the same form and concentration as the lozenges, the greater effectiveness of the gel must be due to the fact that cold viruses tend to concentrate in the nose, not the mouth,这句话是解题目的关键，这道题目属于排除他因，的确挺饶的

LS不正确。 此题的对象 是L和G, 结论是对部位有效。

评价中，答案d,新的元素存在可以weaken结论，不存在是排除它因，support结论。因此选D

[此贴子已经被作者于2008-12-10 16:53:11编辑过]

yeefay

回LS, 我做的是GWD-TN版本,答案给的是D呀 =_=!

raiden_lee

恩，选项看错。已改正

yeefay

恍然的懂了,谢谢各位指点!

smartsky11

44

艾瑞克BA圣诞

以下是引用raiden_lee在2008-12-10 14:58:00的发言：

LS不正确。 此题的对象 是L和G, 结论是对部位有效。

评价中，答案d,新的元素存在可以weaken结论，不存在是排除它因，support结论。因此选D

LS没有问题啊，Since the gel contains zinc in the same form and concentration as the lozenges，这句话是作为ASSUMPTION支持CONCLUSION: the greater effectiveness .....正确答案确实有RULE OUT他因的作用，影响ASSUMPTION

斯咏

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pwss