GWD-10-9 prep答案

prep选E

前段时间做GWD10-9的时候我也是选的E，但发现给的答案居然是c。。。。。

后来搜了很多大家的讨论，结果发现很多牛人也选C，不过实在没有一个说法能说服我。。。

刚刚做了prep碰到了这个题，答案给的就是E

所以希望大家把自己手上的资料的这个题的答案改过来，以免以后碰到被误导。。。

把提贴一下吧, 方便大家啊. GWD有好几个版本呢.

原题如下：

GWD-10-Q9

Although exposure to asbestos is the primary cause of mesothelioma, a slow-developing cancer, researchers believe that infection by the SV40 virus is a contributing cause, since in the United States 60 percent of tissue samples from mesotheliomas, but none from healthy tissue, contain SV40. SV40 is a monkey virus; however, in 1960 some polio vaccine was contaminated with the virus. Researchers hypothesize that this vaccine was the source of the virus found in mesotheliomas decades later.

Which of the following, if true, most strongly supports the researchers’ hypothesis?

1. SV40 is widely used as a research tool in cancer laboratories.

2. Changes in the technique of manufacturing the vaccine now prevent contamination with SV40.

3. Recently discovered samples of the vaccine dating from 1960 still show traced of the virus.

4. In a small percentage of cases of mesothelioma, there is no history of exposure to asbestos.

5. In Finland, where the polio vaccine was never contaminated, samples from mesotheliomas do not contain SV40.

C并不是直接支持，甚至搞不清因果关系。 相反，E为我们提供了一个没有污染就没有SV40的非常直接支持的例子。

对于支持型逻辑，支持的条件属于必要条件而不必是充分条件。