2011年考研英语真题完整版.pdf

2011 年考研英语真题完整版 Section I Use of English Directions： Read the following text. Choose the best word （s） for each numbered black and mark A， B， C or D on ANSWER SHEET 1. （10 points） The Internet a ords anonymity to its users， a blessing to privacy and freedom of speech. But that very anonymity is also behind the explosion of cyber-crime that has1across the Web. Can privacy be preserved2bringing safety and security to a world that seems increasingly3？ Last month， Howard Schmidt， the nation‘s cyber-czar， o ered the federal government a4to make the Web a safer place-a “voluntary trusted identity” system that would be the high-tech5o a physical key， a fingerprint and a photo ID card， all rolled6one. The system might use a smart identity card， or a digita credential7to a specific computer .and would authenticate users at a range of online services. The idea is to8a federation of private online identity systems. User could9which system to join， and only registered users whose identities have been authenticated could navigate those systems. The approach contrasts with one that would require an Internet driver‘s license10by the government. Google and Microsoft are among companies that already have these“single sign-on” systems that make it possible for users to11just once but use many different services. 12 .the approach would create a “wa ed garden” n cyberspace ， with safe “neighborhoods” and bright “streetlights”to establish a sense of a13community. Mr. Schmidt described it as a “voluntary ecosystem” in which “individuals and organizations can complete online transactions with14，trusting the identities of each other and the identities of the infrastructure15which the transaction runs”。