比较性议论文(Analyzing-Alternative Essay)。 比较性议论文用于在两种或两种以上的事物或观点之间作出比较。在对两种事物或观点作比较时, 一定要找出它们的异同点, 在对两事物进行比较和对照之后, 要明确提出自己的见解或认识。下面作文地带为您给出两篇范文做比较，希望您能够理解议论文写作方法。

例如:

   例1.Directions: Traditional ways of life are often changed by modern technology. Using one or two examples of such changes, compare the new ways with the old. Which way of life do you like better? Why?
Technology threatens and inflicts damage upon our quality of life. Scientific achievement of this century is creating a wide- spread plague that would soon destroy the entire world. Let's take, for example, our air. Due to massive air pollution, what we breathe is not relatively safe as it used to be. The fumes from the exhaust pipes of automobiles, trucks and factories blow waste materials into the atmosphere. After a period of time, atmospheric change occur. The fumes, that were collected in atmosphere, are slowly eating away at the ozone layer. This layer of the atmosphere is what shields us from solar ultra -violent rays. Once this layer is gone, our natural protection against the sun would be gone, and if we were hit by one ray of the sun, we'd burst into flames and fired into a cinder. Another plague of technology would be nuclear power. The power that can energize entire cities with electricity could also be the power to destroy. After 1945, the research on nuclear power has increased significantly. Contrary to the belief that it is safe, nuclear power has a way of destroying the whole cities. It is not like a fire that can be put out with water or CO2, but special equipments have to be used. Afterwards, that place would remain radioactive for quite a long time, devoid of life and sound.
So you see, if technology cannot be halted, then our fate is sealed. Our end would not come about by natural means, but by our technological achievements. And life on Earth would cease to exist.

例2.Directions: For this part, you are allowed 30 minutes to write a composition about Bicycle?An Important Means Transportation in China. You should base your composition on the following outline.

1. 为什么自行车在中国这样普及;
2. 和汽车比较;
3. 自行车在中国的前途;

   Bicycle, as a means of transport, is an indispensable companion of most Chinese. Each Chinese family possesses at least one bicycle. China is therefore called 搕he Bicycle Kingdom? The popularity of bicycle in China, I think, is mainly due to the economy of the country and its people. China, as one of the developing countries, has no financial potential to expand its road and to manufacture so many cars to satisfy the need of so many Chinese.
Compared with cars, bicycle, however, still has some advantages. First, it is very convenient. For its small size, it does not need special parking space. It can be parked almost everywhere. For its light weight, it can be carried upstairs and downstairs.