[单项选择]
The Case of the Disappearing Fingerprints
One useful anti-cancer drug can effectively erase the whorls(萝状指纹)and other characteristic marks that give people their distinctive fingerprints.Losing them could become troublesome.A case
(51) online in a letter by Annals of Oncology indicates how big a
(52) losing finger prints is.
Eng-Huat Tan,a Singapore-based medical doctor describes a 62-year-old man who has used capecitabine(卡培他滨)to
(53) his nasopharyngeal cancer(鼻咽症).After three years on the
(54) ,the patient decided to visit his U.S.relatives last December.But he was stopped by U.S. customs officials
(55) 4 hours after entering the country when those officials couldn’t get finger prints from the man.There were no
(56) swirly(旋涡状的)marks appearing from his index fin ger.
U.S.customs has been fingerprinting incoming foreign visitors for years,Tan says.Unfortunately, for the Singaporean
A. released
B. suggested
C. accepted
D. detected