2. 外语
  3. A. be costly B. harmful C. save a life D. still open to debate E. reduce the risk of radiation triggering a cancer F. reduc

A. be costly B. harmful C. save a life D. still open to debate E. reduce the risk of radiation triggering a cancer F. reduc

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问题 A. be costly
B. harmful
C. save a life
D. still open to debate
E. reduce the risk of radiation triggering a cancer
F. reduced to the minimum  
Delaying the age at which screening starts may ______.
选项
答案E
解析 选项E讲到：延缓用X射线检查的年龄也许能减少辐射诱发癌症的危险。文章第六段中我们可以找到答案。
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