16. Student Use of Computer
Students tend to use computers more and more frequently nowadays. Reading this chart, we can find that the average number of hours a student spends on the computer per week has increased sharply. In 1990, it was less than 2 hours; and in 1995, it increased to almost 4 hours, and in 2000, the number soared to 20 hours.
Obviously computers are becoming increasingly popular. There are several reasons for this change. First, computers facilitate us in more aspects of life. Also, the fast development of the Internet enlarges our demands for using computers. We can easily contact with friends in remote places through the Internet. Besides, the prices of computers are getting lower and lower, which enables 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However, there still exist some problems, such as poor quality, out-of-date designs and so on.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 and studying is also a serious problem. Anyhow, we will benefit a lot from computers as long as we use them properly.
17. Health Gains in Developing Countries
It can be seen from the chart that there have been dramatic changes in life expectancy and infant mortality in developing countries in the past decades. As the chart shows, people’s life expectancy soared from 40 years old to 60 years old from 1960 to 1990. Meanwhile, infant mortality declined from 200 to 150 deaths per thousand births.