2、请说明发生这些变化的原因（可从计算机的用途、价格或社会发展等方面加以说明）；
3、你认为目前大学生在计算机使用中有什么困难或问题。
2002年6月的图表题作文：
As is shown by the bar graph, the average number of hours a student in a certain university spends on the computer per week increased dramatically over the period from 1990 to 2000. In 1990, it was less than two hours. And in 1995, it hit/ reach four hours. And in 2000, the number soared to（飞速上升） nearly twenty hours, which is over ten times than that of 1990.
注：soared to/ boom/ shoot up/ rocket/ jump 飞速上升
climb 上升很慢
shrink 下降，缩水
第一段还有一种写法：……In 1990, the number was less than 2 hours, while the figure hit 4 hours（或者这样写：while in 1995,）as compared with that of 1990, it had almost doubled. And what impress us most is that the figure soared to..., which…
Obviously computers are becoming increasingly popular for males and for females. A multitude of factors could account for the rise. In the first place, computers facilitate us in more aspects of life. Also, the rapid development of the internet enlarges our demands for using computers. We can easily contact friends in remote places through the internet. In the second place, the prices of computers are getting lower and lower, which enable more students to purchase them.
However, there still exist some problems, such as, poor quality, out-of-date designs and so on. And how to balance the time between using computers an studying is also a serious problem. Anyhow, we will benefit a lot from computers as long as we use them properly.
IV、书信题的写作方法：
（一）信封格式：