【正确答案】[范文]
It has been widely noted that, with the growing use of computers and calculators both in the classroom and in the home, the level of literacy and mathematical ability of students is dropping. This raises serious doubts about the value of the progress of science and technology. Here I will discuss the pros and cons of this question.
First of all, advances in science and technology have certainly brought about many benefits for mankind. They have made our lives more comfortable and healthier. In addition, they have eased the burden of work for most people and provided them with more leisure opportunities, while at the same time increasing productivity dramatically.
Nevertheless, it cannot be denied that technology has some negative side-effects. As mentioned above, with computers which check spelling, grammar and calculation for them, students have little incentive to learn how to do these things for themselves. Also, the availability of TV programs and videos encourages an unhealthy, sedentary lifestyle.
Another aspect of this issue is that technology may be good or bad, depending on how we use it. For instance, dynamite may be used to make road construction easier, or it may be used to kill people. Again, nuclear reactors can supply huge amounts of cheap electricity, but if they are carelessly handled they can cause devastating pollution.
We can conclude that the progress of science and technology has both positive and negative effects. What we must do is make sure that the positive ones are encouraged and the negative ones are eliminated as far as possible. Among other things, this means that students are warned not to let computers and calculators do all their work for them.

【答案解析】[解析] 范文的首段设置场景，表明写作目的。“人们广泛注意到随着计算机、计算器越来越广泛的使用，在课堂上和在家里，学生的读写能力和数学能力都在下降，这引起人们对科技进步的价值产生怀疑”。对于这种情况“文章中将讨论这个问题的两个方面”，在这里要注意一个表达法：pros and cons，pros表示支持，cons表示反对，pros and cons将从正反两个方面进行阐述。接下来文章第二、三段便分别从支持和反对这两个方面来写。一般说来，“利与弊”的文章写四段即可，主体段落中一个段落写“利”，另一个段落写“弊”，再加上开头和结尾两个段落，但此篇范文共有五段，因为这个题目本身比较特殊，科学技术的进步是个客观现象，它所带来的利与弊往往与人为因素有关，人对科技的运用决定它到底是有利还是有弊，因此文章在主体段落中又添加了一段，阐述科技进步本来是可好可坏的东西，它往哪个方向走取决于人类怎么用它。用两个例子来证明这一分歧观点，“for instance”(例如)炸药的两面性，它既可以在修建公路时减轻人们的工作，但也可以用来杀人，“again”(再如)，注意这里不要写“for another example”，再如核技术可用来发电，但如处理不当，会引起毁灭性的污染。
由主体段落的论述可以得出结论：科技进步既有好的方面，又有不好的方面，我们该做的就是提倡、发扬好的方面，尽可能地消灭不好的方面。接着再就题目本身引申出：此外，学生不应用计算机和计算器帮他们做所有的事情。这篇范文是一篇“利与弊”的经典文章，其中的语言具有相当强的可操作性，文章高度模式化，值得考生认真研究。