[語文] GWD10-Q9
看板GMAT (GMAT入學考試)作者neopalm (JJ......JJJJJJJ)時間17年前 (2007/12/25 19:08)推噓2(2推 0噓 1→)留言3則, 3人參與討論串1/3 (看更多)
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?
A. SV40 is widely used as a research tool in cancer laboratories.
B. Changes in the technique of manufacturing the vaccine now prevent
contamination with SV40.
C. Recently discovered samples of the vaccine dating from 1960 still show
traces of the virus.
D. In a small percentage of cases of mesothelioma, there is no history of
exposure to asbestos.
E. In Finland, where the polio vaccine was never contaminated, samples from
mesotheliomas do not contain SV40.
請教此題答案為 C 亦或 E ?
好像還沒有確定的答案，麻煩各位了！謝謝
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