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?
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 traced of the virus.
D.In a small percentage of cases of mesothelioma, there is no history of exposure to asbestos.
, where the polio vaccine was never contaminated, samples from mesotheliomas do not contain SV40.
答案是E 但是想请问B为什么不对呢？
Smithtown
University’s fund-raisers succeeded in getting donations from 80 percent of the potential donors they contacted.This success rate, exceptionally high for university fund-raisers, does not indicate that they were doing a good job.On the contrary, since the people most likely to donate are those who have donated in the past, good fund-raisers constantly try less-likely prospects in an effort to expand the donor base.The high success rate shows insufficient canvassing effort.
Which of the following, if true, provides more support for the argument?
University’s fund-raisers were successful in their contacts with potential donors who had never given before about as frequently as were fund-raisers for other universities in their contacts with such people.
B.This year the average size of the donations to Smithtown University
from new donors when the university’s fund-raisers had contacted was larger than the average size of donations from donors who had given to the university before.
C.This year most of the donations that came to Smithtown University
from people who had previously donated to it were made without the university’s fund-raisers having made any contact with the donors.
D.The majority of the donations that fund-raisers succeeded in getting for Smithtown University
this year were from donors who had never given to the university before.
E.More than half of the money raised by Smithtown University
’s fund-raisers came from donors who had never previously donated to the university.
正确答案是A 我知道其他的四个选项不对 但是也搞不懂为什么A是对的？ 评价这个学校的fund-raiser ， 跟其他学校的人有什么关系？而且感觉也不想是加强……
Denoma, a major consumer-electronics maker, had a sizeable decline in sales revenue for its most recent fiscal year.This result appears surprising, because electronics retailers report that although their overall sales were considerably lower than in the previous year, their sales revenue from Denoma models actually grew, largely thanks to some innovative and popular models that Denoma introduced.
Which of the following, if true, does most to explain the apparently surprising result?
A.Because of the need to educate the public about its new models’ capabilities, Denoma’s advertising spending was higher than normal over the period.
B.For the period at issue, Denoma’s major competitors reported declines in revenue that were, in percentage terms, greater than Denoma’s.
C.A significant proportion of Denoma’s revenue comes from making components for other consumer-electronics manufacturers.
D.Unlike some of its major competitors, Denoma has no lines of business outside consumer electronics to provide revenue when retail sales of consumer electronics are weak.
E.During the period, consumer-electronics retailers sold remaining units of Denoma’s superseded models at prices that were deeply discounted from those models’ original prices.
which of the following most logically completes the argument below?
According to promotional material published by the city of Springfield, more tourists stay in hotels in Springfield
than stay in the neighboring city of Harristown. A brochure from the largest hotel in Harristown claims that more tourists stay in that hotel than stay in the Royal Arms Hotel in Springfield. If both of these sources are accurate, however, the “Report on Tourism” for the region must be in error in stating that.
A.The average length of stay is longer at the largest hotel in Harristown than it is at the Royal Arms Hotel.
B.There is only one hotel in Harristown that is larger than the Royal Arms Hotel.
C.More tourists stay in hotels in Harristown than stay in the Royal Arms Hotel.
D.The Royal Arms hotel is the largest hotel in Springfield
E.The royal arms hotel is the only hotel in Springfield
.
为什么选D呢……
以上四道题目 千万请大牛指教~~~~
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发表于 2010-4-1 12:02:29
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