2. 外语
  3. A. before the cancer cells spread elsewhere B. the more chances of dying of X-ray radiation he will have C. what is most respons

A. before the cancer cells spread elsewhere B. the more chances of dying of X-ray radiation he will have C. what is most respons

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问题 A. before the cancer cells spread elsewhere
B. the more chances of dying of X-ray radiation he will have
C. what is most responsible for lung cancer
D. as some people imagine
E. the more chances of getting lung cancer he will have
F. which form of lung cancer is a common one
The more cigarettes one smokes, ______.
选项
答案E
解析 由文章第二段第二句的内容可知，平均每天抽21到30支烟的重度吸烟者患肺癌的几率是不抽烟者的17倍。故本题选E。
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