2019年公共英语五级作文范文类型：讨论式
三、讨论式
题目范例：
It has been more than 30 years since man first landed on the moon. Some people think that space research is a waste of money. Discuss.
范文：
For over fifty years, a number of nations have been involved in the exploration of outer space. This research has been very costly, of course. Has this money been well-spent or wasted?
Some people believe that all or most space research should be eliminated because of its incredible expense, not only in terms of money, but also in terms of scientific and human resources. These people point out the fact that it cost billions of dollars to send astronauts to the moon, but all they brought back were some worthless rocks. These people say that the money and effort now being wasted in outer space could be spent on more important projects right here on earth, such as providing housing for homeless people, improving the education system, saving the environment, and finding cures for diseases.
However, other people believe that space research has provided many benefits to mankind. They point out that hundreds of useful products, from personal computers to heart pacemakers to freeze-dried foods, are the direct or indirect results of space research. They say that weather and communication satellites, which are also products of space programs, have benefited people all over the globe. In addition to these practical benefits, supporters of the space program point to the scientific knowledge that has been acquired about the sun, the moon, the planets, and even our own earth as a result of space research.
I agree with those people who support space research and wish it to continue. Space research, as shown, has already brought many benefits to humanity. Perhaps it will bring even more benefits in the future, ones that we can not even imagine now. Moreover, just as individual people need challenges to make their lives more interesting, I believe the human race itself needs a challenge, and I think that the peaceful exploration of outer space provides just such a challenge.
解析：
这篇文章是dicuss^类作文的一个典范，结构清晰，语言简洁明了 。
首段对题目所设置的场景进行介绍：一些国家致力于外太空研究的时间已超过五十年了，由于这项研究的花费很大，所以就引起了一个问题：这笔钱到底花的值不值得，这正是本文所要讨论的问题。
本文的主体段落从正反两个方面对文章的主题进行了讨论，先用一个自然段从反面论述，说明这笔钱花的不值得。在证明这个分支观点时又分别从两个方面来说，一是就金钱的角度而言，花了那么多钱送去外太空的宇航员所带回的都是不值钱的岩石，二是从科学资源和人力资源的角度来看这也是一种浪费。
接下来的自然段作者笔锋一转，谈到有另外一些人认为外太空研究是值得的，并给出具体的例子进行论证。例如有许多新产品直接或间接地得益于外太空研究，除了实用的产品外，外太空研究还使人类获知了许多有关太空的科学知识。
需要注意的是文章的结尾段。上文中已经说到过Discuss类的文章可以在结尾走向折中，也可以一边倒，本文采用了后者，对外太空研究表示支持。这一结论是在前一段的基础上得出的，虽然主体段落的第一段是谈反对的意见，但第二段是谈支持的意见，结尾段也自然而然地表明自己的观点是一边倒的。这种写法使文章的整体感十分明确，结论也是经过对事物双方面的辩证说明所得出的，从而显得很有说服力。
