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标题: 一道gwd上的题 [打印本页]

作者: Jasmine10 时间: 2010-7-5 03:59
标题: 一道gwd上的题
T-9-Q14. GWD-13-40

In response to viral infection,the immune systems of mice typically produce antibodies that destroy the virusby binding to proteins on its surface. Mice infected with a herpesvirus generally develop keratitis, adegenerative disease affecting part of the eye. Since proteins on the surface of cells in this part of theeye closely resemble those on the herpesvirus surface, scientists hypothesizethat these cases of keratitis are caused by antibodies to herpesvirus.

Which of the following, iftrue, gives the greatest additional support to the scientists’ hypothesis?

A. Other types of virus have surface proteins that closely resembleproteins found in various organs of mice.

B. There are mice that are unable to form antibodies in response to herpesinfections, and these mice contract herpes at roughly the same rate as othermice.

C. Mice that are infected with a herpesvirus but do not develop keratitisproduce as many antibodies as infected mice that do develop keratitis.

D. There are mice that are unable to form antibodies in response to herpesinfections, and these mice survive these infections without ever developingkeratitis.

E.Mice that have never beeninfected with a herpesvirus can sometimes develop keratitis

想不通答案为什么是d

作者: nanisoga 时间: 2010-7-5 20:10
本题是support 题型中加强解释现象型题目，其答案特点只有一个就是文章的否命题，在文章中，意思是antibody---keratitis，那么加强他就是，如果unable to develop antibody，就没有能力develop keratitis。这种题答案是确定的，就是否命题，没有其余的答案。

作者: Jasmine10 时间: 2010-7-6 02:48
恩～了解了。谢谢分析：）

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