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考研
Who first hinted at the possible cause of childhood leukaemia by infection? According to the passage, which of the following is
Who first hinted at the possible cause of childhood leukaemia by infection? According to the passage, which of the following is
admin
2009-04-26
51
问题
Who first hinted at the possible cause of childhood leukaemia by infection?
According to the passage, which of the following is true?
选项
A、Most people believe childhood leukaemia is due to environmental factors.
B、Population mixing best explains the cause of childhood leukaemia.
C、Radiation has nothing to do with childhood leukaemia.
D、Children born in a large town are at higher risk of leukaemia.
答案
A
解析
第一段最后一句话证明选项A是正确的。B不对,因为人口混居是造成这种病多发的原因,而非致病的原因;C不对,因为尽管文中说没有确定这种病和辐射的关系,但并不表示它和辐射没有关系;D不对,因为这种病的高发区是人口混居区而非大城镇。所以正确答案应当为A。
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考研英语一
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