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  3. Statisticians studying the health effects of uranium mining on Navajo communitie

Statisticians studying the health effects of uranium mining on Navajo communitie

游客2025-02-25  47
问题 Statisticians studying the health effects of uranium mining on Navajo communities have found others besides miners and millworkers to be affected; birth defects, children’s cancer, and altered birth ratios of males and females are much higher in mining than in non-mining communities.
选项 A、children’s cancer, and altered birth ratios of males and females are much higher
B、cancer among children, and altered male and female ratios at birth are much higher
C、cancer among children, and altered birth ratios of males and females occur much more frequently
D、altered birth ratios of males and females, and children’s cancer are much higher
E、altered male and female ratios at birth, and cancer among children occur much more
答案 C
解析 Statisticians have been studying the frequencies of various health outcomes in uranium mining areas in Navajo communities. They have found that certain kinds of bad outcomes occur much more frequently in mining communities than in non-mining communities.
We need to pick the answer choice that best expresses this finding. The use of the predicate higher is appropriate when applied to rates of illness. However, it is not appropriate when
applied to medical conditions (except as an informal shorthand), e.g., a claim that birth defects ... are much higher. That is, it is unclear what a higher birth defect might specify.
The meaning of altered male and female ratios is unclear, as opposed to altered birth ratios of males and females.
A    In this choice, the statement altered birth ratios... are much higher is unclear.
B    In this choice, the statement altered... ratios at birth are much higher is unclear.
C    Correct. The idea of the sentence is expressed clearly and the phrase occur much more frequently clearly specifies altered birth ratios.
D In this choice, it is unclear what is higher: it could be birth ratios of males and females, children’s cancer, or both.
E    In this choice, the modifier at birth implies, nonsensically, that the ratios were altered at the time of birth. Furthermore, male and female ratios implies that the ratios themselves are of male or female gender.
The correct answer is C.
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