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The most compelling evidence of the risks of carcinogenic effects of
The most compelling evidence of the risks of carcinogenic effects of
游客
2024-01-11
51
管理
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. [br] The author mentions all of the following as factors which limit the persuasiveness of the evidence suggesting a link between environmental pollutants and cancer EXCEPT
选项
A、The lack of study of the effects of pollutants on human health
B、Increased diagnosis rates
C、An increase in the worldwide breast cancer rate
D、A decrease in the worldwide uterine cancer rate
E、Geographical differences in cancer susceptibility
答案
C
解析
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