2013牛津译林版选修七Unit 3《The world online》ppt知识拓展课件.ppt

Unit 3 The world online教材背景链接
名言佳句
Getting information off the 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 is so big,so powerful and pointless that for some people it is plete substitute for life.
—Andrew Brown
因特网如此强大,如此不得要领,以致于对一些人来说,它已经完全成为生活的替代品。
——安德鲁·布朗
How to avoid hacking
Hacking has e a big problem with regard to security,one that even affects the government and other high works.
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It may not be possible pletely remove all hacking risks,but there are steps that you can take to improve your security,and minimize the risk of a hacking attack being essful.
One tip is to watch out for what you read are many websites or advertisements that promise you money or other benefits that sound too good to be times these websites will have viruses or other harmful software programs that install
themselves 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 security measures.
A hacker may provide any type of harmful software as an attachment and then mass mail it to a large number of 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 essential to ensure that there is no virus in your system that would weaken your security.
Be sure to download and install any security updates for your system as soon as they e available.
Not installing all of the mended updates is the same as leaving your PC open for the hackers to walk into.
All of these steps will help you protect puter against any hacking attempts,and will also strengthen your security.