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
A primary lung cancer patient may be cured by removing the lung completely

选项

答案A

解析由文章第四段第五句可知，在继发肿瘤出现之前将肺切除是治愈肺癌的唯一方法，故选A。

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