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  3. As we have learned in our previous lectures, our country generally has an excellent system of transportation. There are efficien

As we have learned in our previous lectures, our country generally has an excellent system of transportation. There are efficien

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问题     As we have learned in our previous lectures, our country generally has an excellent system of transportation. There are efficient airlines, railway systems as well as motorway all across the country; however, if you have been to an airport recently, you’ ve probably noticed that it is becoming more and more crowded. Although airplanes provide the faster way to travel hundreds or thousands of miles, I don’ t think that our industry can do a good job of transporting people between cities that only a short distance apart. A person who travels between London and Birmingham, the so-called strip cities, may spend only relatively a short time in the air while spending several hours getting to and from the airport. This situation makes flying almost as time consuming as driving and of course more expensive, moreover, planes use a lot of fuel in taking off and landing down. So they are simply not fuel efficient on short flights. In my opinion, high speed train may be an answer to that problem. By the end of last century, a proposal for such a train was put forward, this new type of train is called maglev, meaning magnetic levitated train, the maglev train will not ride on the tracks, but will make use of the magnetic repulsion to glide or float above the tracks. Since the train and tracks do not touch and rub against each other, a lot of maintenance work can be saved. These trains will be able to travel at a speed about 300 miles per hour. Undoubtedly, at this speed, conventional trains will have trouble, staying on the tracks. At present, the operation of maglev trains is still on the experimental stage, for example, Germany and China. However, I’ m sure this new type of train on the horizon will revolutionize transportation of the 21st century, the way airplane did in the 20th century.
The passage is mainly on______.
选项 A、The system of transportation in the U. K.
B、The undergoing revolution in transportation
C、The high speed trains of the 21st century
D、The short-distance transportation
答案D
解析 文章主要讲在距离较近的城市之间旅行，乘坐飞机既消耗时间又浪费能源，并提出了应对措施，即悬磁浮列车。所以文章主要内容是短途旅行。
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