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Reviewing historical data, medical researchers in California found that counties with the largest number of television sets per capita have had the lowest incidence of a serious brain disease, mosquito-borne encephalitis. The researchers have concluded that people in these counties stay indoors more and thus avoid exposure to the disease.
The researchers’ conclusion would be most strengthened if which of the following were true?
A.Programs designed to control the size of disease-bearing mosquito populations have not affected the incidence of mosquito borne encephalitis.
B.The occupations of county residents affect their risk of exposure to mosquito-borne encephalitis more than does television-watching.
C.The incidence of mosquito-borne encephalitis in counties with the largest number of television sets per capita is likely to decrease even further.
D.The more time people in a county spend outdoors, the greater their awareness of the dangers of mosquito-borne encephalitis.
E.The more television sets there are per capita in a county, the more time the average county resident spends watching television.
正确答案是E，但我不知道选项A为什么是错的？
结论是people in these counties stay indoors more and thus avoid exposure to the disease.A选项说电视节目不影响疾病的发生率似乎也可以strengthen？
如果是因为电视节目影响疾病发生率，而不是stay indoors的话，结论里thus后面的部分就不成立了。
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发表于 2016-7-23 17:11:10
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