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  3. It sounds like something straight out of a science fiction movie or a silly cartoon：a futuristic traveling tube that can quickly

It sounds like something straight out of a science fiction movie or a silly cartoon：a futuristic traveling tube that can quickly

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问题         It sounds like something straight out of a science fiction movie or a silly cartoon：a futuristic traveling tube that can quickly shoot people wherever they want to go, inside a tiny pod. But this may be just around the corner for people looking for a faster, easier, and cheaper-than-ever way to travel.
        South African-American inventor and billionnaire Elon Musk, who, in the past, has worked on both private space flight and electric cars, recently announced he has been working on the design of this traveling tube, which could forever change the way we travel the world.
        In an interview, Musk described the new tube as a fifth kind of transportation. "We have planes, trains, automobiles, and boats," he explained. "What if there was a fifth mode? 1 have a name for it. It’s called the Hyperloop. "
        "This system I have in mind…can never crash, is immune to weather, it goes three or four times faster than the bullet train… it goes at an average speed of twice what an aircraft would do. You would go from downtown L. A. to downtown San Francisco in under 30 minutes. "
        People using the Hyperloop would shoot around in pods, which are each just over six-and-a-half feet across, and the pods would travel through tubes located either above round or under water.
        The Hyperloop could even run 24/7, be cheap, and allow people to travel on their own schedule. People could show up at the Hyperloop station whenever they want and be quickly sent on their way.
        Additionally Musk believes the Hyperloop could be completely powered by the sun—making it more environmentally friendly than cars, airplanes, or train systems. Someday it could possibly move people between the East and West Coasts of the United States in less than an hour. Eventually the Hyperloop would be able to move people around the world.
        Musk is not the first person outside of science fiction novelists to dream up vacuum tube technology for moving people. The idea has been around for some time, and inventors in other countries, including China, are reportedly working on similar technology.
The "pod" mentioned in the passage is a(n)___________.
选项 A、tube-shaped music player
B、wireless earphone
C、engine that provides a driving force
D、vehicle that carries passengers
答案D
解析 题目中问文章中的pod是什么，通读全文可知，这篇文章中的pod是一种可以搭载乘客的交通工具，故选D。
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