阅读理解 Believe it or not, optical illusion (错觉) can cut highway crashes. Japan is a case in point. It has reduced automobile crashes on some roads by nearly 75 percent using a simple optical illusion. Bent stripes, called chevrons (人字形), painted on the roads make drivers think that they are driving faster than they really are, and thus drivers slow down. Now the American Automobile Association Foundation for Traffic Safety in Washington D.C. is planning to repeat Japan''s success. Starting next year, the foundation will paint chevrons and other patterns of stripes on selected roads around the country to test how well the patterns reduce highway crashes. Excessive speed plays a major role in as much as one fifth of all fatal traffic accidents, according to the foundation. To help reduce those accidents, the foundation will conduct its tests in areas where speed-related hazards are the greatest — curves, exit slopes, traffic circles, and bridges. Some studies suggest that straight, horizontal bars painted across roads can initially cut the average speed of drivers in half. However, traffic often returns to full speed within months as drivers become used to seeing the painted bar. Chevrons, scientists say, not only give drivers the impression that they are driving faster than they really are but also make a lane spear to be narrower. The result is a longer lasting reduction in highway speed and the number of traffic accidents.

单选题 The passage mainly discusses ________.

【正确答案】 A

【答案解析】辨认事实题。题目询问本文的中心，十分明显地，A项与文中之意相符，故此正确；B项是一种喷涂公路的新方法，与全文意思无关；C项是训练司机的新方法，文中并没有此类信息；D项是一种新的视觉错觉，这不是本文论述的中心，如果选择此答案，则对于全文的理解有较大偏差。

单选题 On roads painted with chevrons, drivers tend to feel that ________.

【正确答案】 C

【答案解析】辨认事实题。题目询问如果在公路上喷涂人字形条带，司机会有何感受，根据第2段：人字形条带使司机认为自己开得太快，因此降下车速。A项与题意不符；B项在文中没有提及；C项与文中之意一致，因此正确；D项是他们正接近车速限制，文中没有提到这类信息。

单选题 The advantage of chevrons over straight, horizontal bars is that the former ________.

【正确答案】 C

【答案解析】辨认事实题。题目询问人字形条带优越于横竖条带的地方。根据文章最后两段对于二者的对比可以得知：人字形条带可使司机把速度降下来，而且使道路看上去更窄，同时，它对速度和交通事故的降低有较长的作用，因此，在四个选项中，C项是正确的，与文中之意相符。

单选题 The American Automobile Association Foundation for Traffic Safety Plans to ________.

【正确答案】 A

【答案解析】辨认事实题。题目询问AAAFTS机构正计划干什么，根据第3段：AAAFTS机构正计划引用日本的成功经验，并在以后几年内，测试公路上使用人字形条带的效果。A项是在某些公路上采用日本人的方法；B项是改变交通标志，文中未提及这一举措；C项是用人字形条带替代横竖条带，文中没有提到这一点；D项与原文之意不符。

单选题 What does the author say about straight ,horizontal bars painted across roads?

【正确答案】 B

【答案解析】辨认事实题。题目询问作者如何描述横竖条带。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项是横竖条带在美国已淘汰，文中并没有这样说；B项是一段时间之后，他们(司机)会忽视横竖条带，这与原文之意相符，故此正确；C项、D项两项在文中没有提到，因此不正确。