A. Does cancer always cause pain? B. Can cancer be prevented? C. What is cancer? D. How common is cancer? E. What causes cancer?

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问题 A. Does cancer always cause pain?
B. Can cancer be prevented?
C. What is cancer?
D. How common is cancer?
E. What causes cancer?
F. How is cancer treated?

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选项

答案A

解析 短文的第四段主要讲癌症与疼痛的关系。
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