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  3. In recent years a new and serious problem has arisen for international airlines and their passengers. This is the relatively new

In recent years a new and serious problem has arisen for international airlines and their passengers. This is the relatively new

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问题     In recent years a new and serious problem has arisen for international airlines and their passengers. This is the relatively new crime of hijacking. Once an unheard-of event, it has now become a common occurrence.
    There is not very much anyone can do once a hijacker is on board an aeroplane. He may be carrying a gun or hand grenades, which, if used, would cause a disaster. The only thing to do is try to ensure that these people never get on the plane in the first instance. So airlines all over the world have security procedures. Before any passenger can get on an airplane at the airport, he must go through a series of security checks to make sure he isn’t carrying anything that is potentially dangerous or could be used as a weapon on board. The security measures vary from airport to airport. At some airports there is very little security. At other airports the security checks are very strict and it can take up to half-an-hour to get through them all.
    Kai Tak Airport in Hong Kong, China, has a good security system. No aircraft starting its journey from Hong Kong has ever been hijacked. At Kai Tak, when a passenger first checks in, his or her name is matched with the computer list of passengers booked on that particular flight. If the name is not recognised, the passenger will be taken aside and questioned by security guards and may not be allowed on the plane. Next, every suitcase is X-ray checked before it goes into the plane. Any suitcase that seems to have something dangerous in it is not put on the plane. Then the hand baggage which the passengers will carry on to the plane is checked. Each passenger has to open his or her bag and the security clerk examines the contents. If there is anything that could be used as a weapon, a penknife for example, the security staff take it away and keep it in a safe place on the plane until the flight is over. The passenger can then collect it.
    Finally there is a body check of all passengers. They must pass through a door where X-rays will show if they are carrying anything made of metal, like a gun. If anything suspicious is found, they will be asked to explain. It is only after all these checks that a passenger is allowed to board the plane.
According to the first paragraph which of the following will the author disagree?
选项 A、Hijacking is a relatively new crime.
B、Hijacking is practically unheard-of.
C、The number of Hijacking is increasing.
D、Hijacking is a serious problem facing international airlines.
答案B
解析 排除题。根据题干定位第一段。本题答案应为不符合原文意思的选项。选项中，A、D两项来自原文a new and serious problem，C项来自has now become a common occurrence，而B项practically unheard-of与原文once an unheard-of event的意思相违背，答案为B。
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