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  3. A supersonic airliner like Concorde flies at twice the speed of sound. A passenger can leave London at noon and arrive in New Yo

A supersonic airliner like Concorde flies at twice the speed of sound. A passenger can leave London at noon and arrive in New Yo

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问题     A supersonic airliner like Concorde flies at twice the speed of sound. A passenger can leave London at noon and arrive in New York at ten o’clock that same morning! There is a five-hour time difference between the two cities and Concorde can fly the Atlantic in only three hours. That evening the passenger will feel it is time to go to bed when it is only six o’clock. The evening will only just be beginning. Airline pilots suffer from this very much. It may be in the middle of the night in Hong Kong but their stomachs are still on London time, where it is dinner time. Pilots and other airline crew have to adjust to constant changes in time. That is why they often look fifty years old when they are only forty. This adjustment to sudden changes causes all sorts of problems.
    Air travel is getting faster all the time. Engineers say that soon people will be "shot" to their destinations in huge rockets. These rockets will be shot high above the earth’s atmosphere and land on the other side of the earth forty-five minutes after take-off. They will be able to cross the Pacific Ocean in only eighteen minutes.
    But, of course, passengers will face the same problems on the ground that they face at present. We shall still spend hours getting to the airport. Today, the shortest part of the journey and the least difficult is in the air. The worst and longest part is on the roads leading from the center of town to the airpo rt. The roads become more and more crowded while our planes become faster and faster.
According to the passage, we can see that______.
选项 A、the speed of sound is only half that of a Concorde
B、the rocket is the fastest and least difficult means of travel
C、a supersonic plane can fly the Pacific in only eighteen minutes
D、people will spend less time on the ground as air travel is getting faster
答案A
解析 本题为细节题：也是一种判断题。本题的问题是“从短文中，我们可以得知什么。”需要将每一个选项与文章中所给信息进行对比。从文章第一句“Concord这样的超音速客机的速度是声音传播速度的两倍”我们可以得知，选项A．所表达的“声音的速度是Concord的一半”为正确答案。选项B中提到的rocket只是工程师们的设想，而且也仅仅说时间短，并没有说是最快且最为容易的旅行方式；选项C来自第二段最后一句“They will be able to cross the Pacific Ocean in only eighteen minutes．”乘坐的工具是rocked而非supersonic plane。选项D的判断基于文章最后一段。最后一段指出：即使空中交通速度越来越快，人们在地面上花费的时间还是不会比现在少。
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