A、86% B、7.68% C、87% D、78% A此题主要考查数字。所以，考生一听到数字往往就要留心，培养敏感度。提炼出来不难得出答案是86%。

Cyber attacks are on the increase against home computer users largely because they have lower levels of security protection. That’s according to Symantec Corporation that sells computer anti-virus software. Symantec’s latest Internet Security Threat Report finds home users account for 86% of all targeted attacks followed by businesses that sell financial services. In addition, attackers are using a variety of techniques to escape detection and prolong their presence on your system. Symantec says there’s one reason scammers are going after home computers. "And that’s partially because of the data that contain credit card information, social security numbers, and partially because of the machines that control the high speed links which in turn can be used for spamming, and fraud". Symantec says attackers are using a variety of means to steal information and they get more sophisticated every day. "So we’ve already seen the attackers go from e-mail only to Web browsers. And now we are starting to see them using other techniques, such as instant messaging and phone calls." The company urges computer users to develop Internet streetsmarts and be skeptical of anyone online who asks them to divulge confidential information.