题目内容
10．"Iris scan （虹膜扫描），please，"the bank's computer voice tells you．You step up and the computer reads your eye，comparing it to the stored file it has of your iris．The images had better match-otherwise you won't be able to get your money．Iris scanning and other technologies，such as fingerprint and voice scanning，have appeared in many science fiction movies in the past．Today，these advanced technologies are part of the real world．They are common at work，the bank，the airport，and your local prison．The iris scan，fingerprint scan，and voice scan are all examples of biometrics（生物测定学） a fast developing area of automatic personal identification technology．Basically，biometrics uses various ways to verify a persons identity，based on the individual's unique characteristics，includingfingerprints，voices，irises，body heat patterns，facial images，handprints，signatures and so on．
Biometrics identification systems have a number of advantages over password systems．The primary advantage is that an individual has to be physically present in order to be identified．Another important advantage is that there are no passwords to remember，forget，lose or steal．
The voice scan is the simplest and most affordable form of biometrics．It only requires a computer，a microphone and the correct software．The software records a subject's voice and then compares it to a stored voice sample for identification purposes．
For additional safety，fingerprint and handprint scans can also be employed．Fingerprint scans take the image of a fingerprint and compare it to a stored file of prints．Handprint scans identify the unique features of a hand．
Iris scans currently give the highest level of accuracy among all the available biometrics systems．Another technology，full facial scans，is currently in use at border crossings and airports．Facial scanning equipment can actually track and identify moving faces within a crowd．
The potential of biometrics is exciting and encouraging．With continued development，testing，and application，current technologies will become even more effective in the future．Soon，the days of password and car keys will be gone．Just don't leave home without your fingerprints!
29．The first paragraph serves as a（n）．D
A．conclusion B．explanation C．comment D．example
30．The underlined word"verify"in Paragraph 2probably means""．B
A．change B．confirm C．develop D．protect
31．Which is the most accurate form of biometrics？A
A．The iris scan B．The fingerprint scan C．The voice scan D．The facial scan
32．What is the author's attitude towards the future of biometrics？C
A．He is uncertain about it．
B．He feels doubtful about it．
C．He feels hopeful about it．
D．He is worried about it．
分析 作者主要介绍了虹膜扫描和人的指纹识别、声音识别、脸谱识别这些都是生物测定学的手段，可以更好的鉴定人的身份．
解答 29．D 细节题．根据文章内容，"Iris scan （虹膜扫描），please，"the bank's computer voice tells you．You step up and the computer reads your eye，comparing it to the stored file it has of your iris．The images had better match-otherwise you won't be able to get your money．该部分介绍了去银行取钱用电脑进行虹膜扫描，这是现在对人的身份进行生物测定．而虹膜扫描和人的指纹识别、声音识别、脸谱识别这些都是生物测定学的手段，因此将虹膜扫描作为一个例子来引出话题，故选D
30．B 细节题．根据文章内容，Basically，biometrics uses various ways to verify a persons identity，based on the individual's unique characteristics，includingfingerprints，voices，irises，body heat patterns，facial images，handprints，signatures and so on．通常情况，生物学可以用多种方式来测定人的身份，其中包括虹膜扫描、指纹识别、声音识别、脸谱识别，结合选项，故选B
31．A 细节题．根据文章内容，Iris scans currently give the highest level of accuracy among all the available biometrics systems．虹膜扫描是生物测定里面精确率最高的一种方法了，结合选项，故选A
32．C 主旨题．根据文章内容．作者对各种生物测定都说明了其各自的好处，可以看出他对生物测定学的将来抱有很大的希望的．结合选项，故选C
点评 本文是一个科教类阅读，题目涉及多道细节理解题，做题时结合原文和题目有针对性的找出相关语句进行仔细分析，结合选项选出正确答案．推理判断题也是要在抓住关键句子的基础上合理的分析才能得出正确答案，切忌胡乱猜测，一定要做到有理有据．
