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1、2022-2023年甘肃省定西市大学英语6级大学英语六级真题(含答案)学校:_ 班级:_ 姓名:_ 考号:_一、2.Reading Comprehension (Skimming and Scanning)(20题)1.Keeping the Net SecureOn September 11 traditional telephone providers did a heroic job of struggling to restore service. When the World Trade Center towers fell, they severely damaged a Veri
2、zon central office with 350,000 voice lines and 3.5 million data circuits carrying the financial information that is the lifeblood of Wall Street firms. Verizon employees and those of many other telecommunications carders worked night and day, alongside the firemen, the police, and volunteers, at th
3、eir own recovery job. In about a week they had rerouted some two million data circuits, restored switches, and installed temporary power supplies. The other 1.5 million circuits originated in buildings that no longer exist.In the days after the attack the number of voice calls in the five boroughs o
4、f New York City doubled, from the normal 115 million a day to more than 230 million. For the next six days Verizon waived charges for its pay phones in Manhattan. On a single day following the disaster residents placed some 22,000 local calls free of charge from regular sidewalk pay phones below Can
5、al Street, and Williams Communications switched five million voice calls in the metropolitan area-three times the average daily volume. AT&Ts long-distance volume jumped from a weekday average of about 300 million domestic voice calls to more than 431 million on September 11, the busiest weekday eve
6、r across AT&Ts domestic voice network.But despite the efforts to keep them in operation, under the extraordinary pressure of September 11 the traditional voice-telecommunications systems in the New York area and the Washington, D.C. area-both wire and wireless-were significantly overtaxed. In East C
7、oast cities cell-phone networks could not keep up with demand. Many long-distance calls inbound to New York City were blocked, in part to reserve circuits for outgoing calls. On that day the Internet proved its value as an essential part of the modem communications system.More than half of America n
8、ow uses the Internet. Globally, users number more than 300 million. Virtually all large businesses use the public Internet or private versions of the same technology to conduct their most important activities. So it was not surprising-although it was staggering-to see that on September 11 more than
9、1.2 billion instant messages were sent by AOL users alone. Slipping past the congested voice networks onto the PC screens of friends and family around the globe were the ties that bind us in the modem world: R U OK? ALRIGHT? “ “U THERE?As voice networks blocked incoming calls to New York in order to
10、 relieve congestion, some carders pushed their voice traffic over the Internet. ITXC, which specializes in Internet voice services, saw its domestic wholesale business double on September 11 as carriers searched for new channels of communication; Yahoos PC to Phone calling service increased by 59 pe
11、rcent. The performance of these voice-over-IP services suggests that in only a handful of years most voice traffic is likely to be carded on the Internet.Why did the Internet work so well in the face of huge volume? Because its distributed technology is inherently robust. Normal phone connections, w
12、hether by means of wired line networks or by wireless cellular networks, open a specific circuit, or channel, connecting the person who is called and the caller. Just as if a superhighway lane were opened for one car only, the circuit remains dedicated to the conversation even if no one is speaking
13、at the moment. If too many circuits are requested at one time, the system blocks calls.In contrast, Internet messages dont travel on designated circuits. Instead, the messages are coded in is and Os, and then disassembled into packets of data. The packets go out from the PC down the phone line and i
14、nto the maze of interconnected fibers that envelops every metropolitaA.Y B.N C.NG2.Keeping a time log is a very effective way to find out _.A.what activities you are doing every dayB.how you are spending your time every dayC.what benefits you can gain by managing timeD.how you can improve your perfo
15、rmance at work3.There are two basic categories of negotiation styles: positional and _.4.According to Michael Twery, why dont those people with snoring problems go to sec their doctor?A.Because they arc afraid to be laughed at by others.B.Because they arc not aware of the problems due to their slow
16、progress.C.Because they arc too busy to go to hospital.D.Because they are unwilling to talk about snoring problems.5.Her last experiment proved that an effective way of taking advantage of the power of luck is _.6.According to the author, the development of laughter is based on _.7.With a view to improving hybrid performance,
