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When in August last year Britain’s security services uncovered an alleged p
When in August last year Britain’s security services uncovered an alleged p
游客
2024-05-31
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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. [br] After the bomb plot was discovered, severe delays were caused at Heathrow Airport due to _____.
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答案
additional passenger checks
解析
题目问的是炸弹阴谋被发现后,什么原因造成希思罗机场的严重延误。原文第一段首句提到,据称有人欲携带液体炸弹在希思罗机场登机,阴谋被英国安全部门发现后,这一世界上最繁忙的机场由于额外安检措施而几乎陷于停顿、题干中的severe delays were caused是对原文almost ground to a halt的转述,due to与原文中的as相对应,都表示原因,且due to后接名词,故答案为additional passenger checks。
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