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外语
A、Traffic jams in cities. B、Inefficient use of energy. C、Fuel shortage. D、Global warming. B四个选项均是抽象名词,推测可能与短文的中心思想有关。短文中提到了各种交通工
A、Traffic jams in cities. B、Inefficient use of energy. C、Fuel shortage. D、Global warming. B四个选项均是抽象名词,推测可能与短文的中心思想有关。短文中提到了各种交通工
admin
2016-02-04
39
问题
Every year, people in America use energy equal to over 30 million barrels of oil each day. That’s energy in all forms—oil, gas, coal, nuclear, solar and even wind power. Viewed from scientists’ standpoint, all the energy contained in fuel either now or in the future becomes heat. Some of the heat is used directly or produces useful work: the rest is lost or rejected, radiated into the atmosphere from the engines, motors, boilers and all the other energy-consuming machinery that makes Americans’ wheels go around. If we could figure out how to improve the efficiency with which we use energy, we can do a lot more work with the energy that is available. With money and careful planning, we can boost efficiency up to a point. Yet improvement won’t come easily, it won’t come overnight and there are limits beyond which not even science can take us. According to the Centre for Strategic and International Studies, about three quarters of energy we use to move things, including ourselves, accomplishes no useful work. In terms of efficiency and cleanness, buses, trains and other forms of public or mass transportation are superior to the private automobile. But only if they operate at near capacity, otherwise, their overall efficiency is poor. For some people, mass transit might answer all transportation needs. For others, a combination of mass transit and private transportation may be desirable. Better design and wiser use of both mass transit systems and private vehicles will play an important part in helping America get more out of energy used for transportation.
22. What does the speaker say about energy used in the United States?
23. What do scientists say about energy contained in fuel?
24. When does mass transit prove superior to private vehicles?
25. What seems to be the speaker’s biggest concern?
选项
A、Traffic jams in cities.
B、Inefficient use of energy.
C、Fuel shortage.
D、Global warming.
答案
B
解析
四个选项均是抽象名词,推测可能与短文的中心思想有关。短文中提到了各种交通工具,但是没有涉及交通拥堵,故可排除A);能源短缺是事实,但短文中并没有重点关注,故可排除C);短文只是提到能源最终变成了热量,但并没有引申到全球变暖的话题,故可排除D);说话者多处提到efficiency,并指出了效率的重要性,“资金投入加之详细计划,我们可以提高能源使用效率”,同时对交通工具的低能效表示关注,因此他真正关注的是能源利用率不足,希望提高使用效率,故答案为B)。
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0
大学英语六级
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