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

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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D

解析 本题考查的是对阐述文章的主旨事实与细节的了解。文章开始说如果早做检测早发现癌症会拯救人的生命,但是检测又对人体会产生辐射,加大了辐射的危害。所以。作者的答案也不是很明确。
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