国际顶尖MBA申请交流平台--TOPWAY MBA

标题: GWD1-9 [打印本页]

作者: maydaythekid 时间: 2007-7-31 06:56 标题: GWD1-9

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 US 60 percent of tissue samples from mesotheliomas, but none from healthy tissue, contain SV40. SV40 is a monkey virus; however, i 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?
C. Recently discovered samples of the vaccine dating from 1960 still show traces of the virus.
E. In finland, where the polio vaccine was never contaminated, samples from mesotheliomas do not contain SV40.

正确答案是ｅ，为啥不选ｃ呢？

作者: aegeanyoung 时间: 2007-7-31 14:04

C 不能说明polio就是source of the virus. 比如，只有一个sample发现了这个vaccine,那能说明么？

E是无因无果的加强

作者: lxj19820127 时间: 2007-8-1 06:31

C只说明了SHOW TRACE OF VIRUS, 也没有说明VIRUS到目前仍存活.

E是SUPPORT中反因反果的题目,跟假设中的因果关系也相应.

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