- 角速度
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We can conclude from the passage that _________.
A．while pushing asteroids off course nuclear weapons would destroy the world
B．asteroids racing across the night sky are likely to hit Earth in the near future
C．the worry about asteroids can be left to future generations since it is unlikely to happen in our lifetime
D．workable solutions still have to be found to prevent a collision of asteroids with Earth
正确答案
D
解析
推断题。题目询问从内文中，我们可得出什么结论。[A]中，核武器虽然可以改变小行星轨道，但却会摧毁地球。文中只提及核武器对地球而言是一大威胁，可并没有明确提到会产生的后果；[B]中，在不久的将来，划过夜空的小行星会撞击地球。文中提到的时间为50万年一次，两者时间不一致；[C]中，这种担心不太可能发生在我们这个时代，因此，可以留给后代的人来考虑。这与全文主题不符；[D]中，需要寻找切实可行的解决方法，来解决这一碰撞，这正是沿着本文的写作思路可得出的结论。
What does the author say about straight ,horizontal bars painted across roads
A．They are falling out of use in the United States.
B．They tend to be ignored by drivers in a short period of time.
C．They are applicable only on broad roads.
D．They cannot be applied successfully to traffic circles.
正确答案
B
解析
辨认事实题。题目询问作者女口何描述横竖条带。根据第5段：横竖条带可使司机的速度下降一半，但在几个月之后，他们会习惯于此，从而使速度又回到原来的水平，[A]是横竖条带在美国已淘汰，文中并没有这样说；[B]是一段时间之后，他们(司机)会忽视横竖条带，这与原文之意相符，故此正确；[C]、[D]两项在文中没有提到，因此不正确。
What's the author's purpose in writing this passage
A．To show the inability of trains to compete with planes with respect to speed and convenience.
B．To stress the influence of the automobile on America's standard of convenience.
C．To emphasize the function of travel agencies in market promotion.
D．To illustrate the important role of persuasive communication in changing consumer attitudes.
正确答案
D
解析
主旨题。题目询问作者写这篇文章的目的。从文章的内容来看作者的目的是通过向人们讲述美国铁路客运公司如何用广告对消费群体施以影响并最终获得成功的事例，说明运用媒体沟通来改变人们消费观念的重要性。这正符合[D]。[A]、[B]、[C]三项都没有准确、完整地表达作者的意图，故不合适。
To encourage consumers to travel by train, DDB Needham emphasized ___________.
A．the freedom and convenience provided on trains
B．the practical aspects of train travel
C．the adventurous aspects of train trips
D．the safety and cleanliness of train trips
正确答案
C
解析
辨认事实题。题目询问为了鼓励人们坐火车，DDB Needham强调了什么。文章的第3段提到：考虑到汽车与飞机的优点，该机构发起了一项目的在于强调到广大的西部进行户外旅行所能享受到的种种优点(如自如、轻松、舒适等)的宣传运动，而且这些优点都是乘坐汽车和飞机所不能享受到的。在四个选项中，[A]、[B]、[D]三项都只强调了火车旅行的某些方面，[C]则全面回答了火车旅行的种种优点，无疑是最合适的。
It can be inferred from the passage that the drop in Amtrak ridership was due to the fact that __________.
A．trains were not suitable for short distance passenger transportation
B．trains were not the fastest and most convenient form of transportation
C．trains were not as fast and convenient as they used to be
D．trains could not compete with planes in terms of luxury and convenience
正确答案
B
解析
推断题。从第2段可以得知，火车客运量下降的主要原因是既没有汽车那样方便，又没有飞机那样快捷，而火车的高效和便利优点不复存在，最终导致了火车客量的下降，故[B]是正确的。[A]、[C]、[D]三项都不准确。
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