四级作文范文选1.doc

四级作文 1. Cyber Crimes ??? Nowadays cyber criminals seem to be everywhere, with a few clicks, committing all kinds of cyber crimes. To illustrate, some commit fraud or lift intellectual property. Others subvert deals, snatch passwords or disrupt e-commerce. Still others unleash viruses to crash computers. As a result, these hackers do a great damage to companies and computer users, causing computer losses up to 10 billion dollars per year.??? Naturally, there are many causes for the cyber crimes. In addition to the wicked nature of the hackers, the frailties of Internet partially nourish the crimes. Just because there are holes in Internet, the complex software is buggy and often infested, the cyber vandals can find out the weakness in the Website software programs and IV manipulating software glitches, gain access to Website, committing all kinds of crimes.??? However, we shouldnt tolerate these cyber criminals any more. And its high time for us to take all the effective steps to battle the cyber crooks. First we should reinforce the cyber laws to protect the Web, the powerful engine of economy. Besides, we should use high techniques to improve intrusion detection, encryption and computer security. Finally, we should train more talented people to build up more firewalls so as to make the net immune to all kinds of viruses and unalienable to all kinds of cyber criminals. 1．网上犯罪的形式很多，如…with a few clicks 点击鼠标 subvert deals 破坏交易 snatch passwords 窃取密码 unleash viruses 释放电脑病毒 2．网上犯罪的根源wicked nature of the hackers frailties of Internet 3．如何打击网上犯罪现象reinforce the cyber laws high techniques train more talented people cyber crime 网上犯罪 cyber criminal 网上罪犯 cyber vandal 网上恶棍 cyber thieves 网上盗贼 lift intellectual property 窃取知识产权 infest 侵扰 gain access to 进入，入网 infest 侵扰 buggy 染上病毒的 2. Shopping on the Internet(网上购物)With the development of the Internet and the popularization of computers, shopping on the Internet has become a commonplace in our life. Here consumers can buy almost