以下是引用ziwingfong在2007-7-6 14:21:00的发言：Biometric access-control systems-those using fingerprints, voiceprints, and so forth, to regulate admittance to restricted areas-work by degrees of similarity, not by identity. After all, even the same finger will rarely leave exactly identical prints. Such systems can be adjusted to minimize refusals of access to legitimate access-seekers. Such adjustments, however, increase the likelihood of admitting impostors. Which of the following conclusions is most strongly supported by the information above? B.if a Biometric access-control system reliably prevents impostors from being admitted, it will sometimes turn away legitimate access-seekers. C. Biometric access-control systems are appropriate only in situations in which admittance of impostors is less of a problem than is mistaken refusal of access. 我觉得C更与主题贴近呀，为什么不选？ C说了一个比较.说了impostor被人为是真的,和那些被误诊断的比较.这在文章中没有说. 文章只是说 increase the likelihood of admitting impostors.没有和refusals of access to legitimate access-seekers的比教说明.C是不对的. | 
