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When in August last year Britain’s security services uncovered an alleged plot to smuggle the liquid components of a bomb onto a
When in August last year Britain’s security services uncovered an alleged plot to smuggle the liquid components of a bomb onto a
admin
2010-10-28
103
问题
When in August last year Britain’s security services uncovered an alleged plot to smuggle the liquid components of a bomb onto an aircraft at Heathrow, the world’s busiest international airport almost ground to a halt as additional passenger checks were ordered. It was not just flights starting from Heathrow that were delayed or cancelled, but many incoming services too. In the following days British Airways alone cut more than I 200 flights.
Intelligence to prevent attacks is part of what experts call a "layered" security approach. Other layers include checking identities, scanning people and their luggage and searching them at random. Another and increasingly important one is to see how people behave. "There are identifiers of people who have hostile intent that you can pick up," says Kip Hawley, the head of America’s Transportation Security Administration. "Our testing indicates an extraordinary high degree of success."
Security officials with the Israeli airline El A1 already spend a long time questioning passengers in order to identify behavioral traits that mark them out as dangerous. But El A1 is small and America’s airports would grind to a halt if such time-consuming procedures were adopted everywhere. So the system that will emerge in America is likely to involve pre-screening of passengers right from the time they make their reservation. Then, as they go through the different layers of security at the airport, some passengers will be asked questions by specially trained staff who are looking out for things like involuntary facial-muscle movements. A twitch (颤搐) is impossible to hide. "The more you try to avoid it, the more pronounced it becomes," says Mr. Hawley.
Machines used to scan luggage at airportsare getting more powerful too. Instead of just alerting staff to suspicious images, newer scanners will be able to work out what they show. New biometric passports, which contain details such as fingerprints and iris(虹膜) scans, will also improve identification.
But Mr. Hawley insists that security measures should not rely solely on machines however they are sophisticated, as threats change. It will take a combination of science and technology to reduce the hassle(麻烦) involved in passing through airports.
Among different layers of security approach at airports, which one is growing more important?
选项
答案
To see how people behave.
解析
题目问的是在不同层次的安保措施中,什么变得越来越重要。原文第二段第二句和第三句提到,安保措施的其他层次包括身份检查、人体扫描和行李扫描等,另一个越来越重要的层次是观察人们的行为举止。题干中的growing more important是对原文increasingly important的同义转述,故答案为to see how people behave。
转载请注明原文地址:https://kaotiyun.com/show/gvz7777K
0
大学英语六级
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