新版GRE写作新题库：Argument41

　　编辑点评： GRE写作需要大家积累一定的写作素材、锻炼自己的逻辑思维、多多积累一些有用的句子和词汇，有了这些基础以后，就需要大家根据真题来进行练习写作了。

　　A ten-year nationwide study of the effectiveness of wearing a helmet while bicycling indicates that ten years ago, approximately 35 percent of all bicyclists reported wearing helmets, whereas today that number is nearly 80 percent. Another study, however, suggests that during the same ten-year period, the number of bicycle-related accidents has increased 200 percent. These results demonstrate that bicyclists feel safer because they are wearing helmets, and they take more risks as a result. Thus, to reduce the number of serious injuries from bicycle accidents, the government should concentrate more on educating people about bicycle safety and less on encouraging or requiring bicyclists to wear helmets.

　　Write a response in which you examine the stated and/or unstated assumptions of the argument. Be sure to explain how the argument depends on these assumptions and what the implications are for the argument if the assumptions prove unwarranted.

　　中文翻译：

　　一项为期十年的对于在骑自行车时戴头盔的作用的研究显示，10年前，所有骑车人中大约有35%报告说他们戴头盔，现在这个比例接近80%。然而另外一项调查显示在相同的十年期间，因骑车引起的事故数量增加了200%。这些结果说明骑车人因为戴着头盔而感到更安全，因而导致他们面临更大的危险。因此，为减少自行车事故中严重伤害的数量，政府应该更多地对人们加强自行车安全的教育，并提供鼓励或要求骑车人戴头盔的课程。

　　写一篇回应，在其中检视文章的论证中述及和/或未明确述及的假设，务请解释文章的论证是如何依赖于这些假设的，并指出如果这些假设不成立会对文章的论证带来何种影响。