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. reduced to

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

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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 题意：50岁以下的女性使用X射线检查的优势是减少辐射诱发癌症的风险。短文第六段提到“如果X射线检查在50岁开始而不是在45岁开始，会使妇女们由于辐射而患癌症的危险减少到40％到80％”，通过这句话可以推断出延缓用X射线检查可以减少辐射诱发癌症的危险，故选E。
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