-考呗网题库移动版

单选题

A．It is mostly imported from the Middle East．
B．It is a sure indicator of its economic activity．
C．It has a direct impact on the international oil market．
D．It equals more than 30 million barrels of oil each day．

参考答案D

解析:
(22) Every year, people in America use energy equal to over 30 million barrels of oil each day．That's energy in all forms--off, gas, coal, nuclear, solar and even wind power．(23) 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．(25-1 ) 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．(25-2) In terms of efficiency and
cleanness, buses, trains and other forms of public or mass transportation are superior to the private automobile．(24) 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．
未听先知
预览四道题的选项，由选项中的0il，heat，pollution，enviroment-friendly，energy，Feul等词可以推测，短文与能源和环保有关；根据第24题各选项中的When，需要关注短文中提到的时间点；第25题是抽象的名词短语，推测可能会考查文章的中心议题。
What does the speaker say about energy used in the United States?
详解
四个选项均是以It开头的句子，C、D中均出现了oil，可推测该题可能与石油相关。短文中提到美国人每天使用的能源等于3千多万桶石油，故答案为D)。

点击查看答案进入在线模考

你可能喜欢

单选题

A．It eventually turns into heat．
B．It is used in a variety of forms．
C．Its use is chiefly responsible for air pollution．
D．Part of it is lost in the process of transmission．

点击查看答案进入在线模考

单选题

A．When it is used in rural areas．
B．When it is environment-friendly．
C．When it operates at near capacity．
D．When it operates at regular times．

点击查看答案进入在线模考

单选题

A．Traffic jams in cities．
B．Inefficient use of energy．
C．Fuel shortage．
D．Global warming

点击查看答案进入在线模考

hot热门搜索

你可能喜欢

延伸阅读