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The most compelling evidence of the risks of carcinogenic effects of environmental pollutants comes from animal data, suc
The most compelling evidence of the risks of carcinogenic effects of environmental pollutants comes from animal data, suc
admin
2011-01-17
48
问题
The most compelling evidence of the risks of carcinogenic effects of
environmental pollutants comes from animal data, such as the reproductive
failure and anomalous development witnessed in birds and fish exposed to DDT.
Line But can human health effects of a compound be judged without a consensus of
(5) independent epidemiological studies and experimental findings on humans
subjects? One would argue not, even though increases in breast cancer have
recently been correlated to exposure to environmental pollutants. Scientists
reviewing worldwide morbidities of certain hormonally responsive organs have
found that while the incidence of breast cancer has been increasing, that of
(10) cancer of the uterus, another hormonally responsive organ, has been
decreasing. There is thus no evident increase in uterine cancer that would
support the claim that a pollutant is causally responsible for the recent increase
in breast cancer. It has been suggested that the increase may be the result of
increased diagnosis, and geographical differences in cancer susceptibility are so
(15) large that the currently available statistics do not permit a definite conclusion.
The primary purpose of the passage is to treat the potential correlation between environmental pollutants and carcinogenic effects in which of the following ways?
选项
A、Explicate the reasons it has been suggested
B、Suggest an alternative correlation
C、Examine its possible implications
D、Criticize the evidence used to support it
E、Present findings that qualifies it
答案
D
解析
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本试题收录于:
GRE VERBAL题库GRE分类
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GRE VERBAL
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