1、Unit 3The world online教材背景链接名言佳句名言佳句Getting information off the Internet is like taking a drink from a fire hydrant.Mitchell Kapor从因特网获取信息犹如从消防栓饮水。米切尔卡普尔(Lotus公司创使人)The Internet is so big，so powerful and pointless that for some people it is a complete substitute for life.Andrew Brown因特网如此强大，如此不得要领，以
2、致于对一些人来说，它已经完全成为生活的替代品。安德鲁布朗How to avoid hacking Hacking has become a big problem with regard to Internet security，one that even affects the government and other high security computer networks.类文欣赏类文欣赏It may not be possible to completely remove all hacking risks，but there are steps that you can tak
3、e to improve your Internet security，and minimize the risk of a hacking attack being successful.One tip is to watch out for what you read online.There are many websites or advertisements that promise you money or other benefits that sound too good to be true.Many times these websites will have viruse
4、s or other harmful software programs that installthemselves on your system and make it vulnerable to hacking.Do not open any attachments in your email if you do not recognize the sender.Some viruses and hacking attempts use email to get around your Internet security measures.A hacker may provide any
5、 type of harmful software as an attachment and then mass mail it to a large number of people.It is a good idea to use an antivirus software program to scan attachments even from someone you know，just in case a file is infected unconsciously(不知不觉地)Having a high quality antivirus program is also essen
6、tial to ensure that there is no virus in your system that would weaken your Internet security.Be sure to download and install any security updates for your system as soon as they become available.Not installing all of the recommended updates is the same as leaving your PC open for the hackers to wal
7、k into.All of these steps will help you protect your computer against any hacking attempts，and will also strengthen your Internet security.Use common sense and follow these simple tips，and you will greatly reduce the risk of becoming a hacking victim.Find the right words in the passage that match th
8、e following explanations.1_vto reducesomething that is difficult，dangerous，or unpleasant to the smallest possible amount or degree(in Para.1)2 _ adj.exposed to danger or attack；unprotected(in Para.2)minimizevulnerable3_ na document or file that is sent with an email message(in Para.3)4_adj.extremely important and necessary(in Para.4)essentialattachment
