Here below listed are the important aspects about Unit One.

1. 1.Internet Safety

The influences of Internet: Internet can make people keep in touch and get more useful information. And you can do research and learn anything you want to know through the various websites. Besides there are some Internet games that can make people relax and make new friends. However, people may meet someone that wants to try to take advantages of you, financially or physically. Though people can remain anonymous, there are some people that want to request your personal information to some illegal or harmful purposes.
Rules of smart surfing: First rule is to remain as anonymous as possible. That means keeping all private information private. Secondly, think carefully before you create an email address or screen name. And in chat rooms, use a nickname that's different from your screen name. Besides, experts recommend that people keep online friendships in the virtual world. What’s more, when you need help, you can turn to the website of the National Center for Missing and Exploited Children for help.

2.Television: How It Affects Us

The influences of TV: Television can offer people more knowledge of the outside world. There are many high-quality programs that help people understand some fields of study: science, medicine, the arts and so on. Secondly, television benefits elderly people who can't often leave the house, as well as patients in hospitals. What’s more, it also offers nonnative speakers the advantage of daily informal language practice and they can increase their vocabulary and practice listening. Although television provides us with a pleasant way to relax and spend our free time, there are some disadvantages of television. Many children stare at TV screen for a long time, which does harm to people’s physical health and study. This kind of influence is negative.
TV addiction: Addiction to a TV screen is similar to drug or alcohol dependence: people almost never believe they are addicted.