2021四川考研英语考试考前冲刺卷.docx

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1、2021四川考研英语考试考前冲刺卷本卷共分为1大题50小题，作答时间为180分钟，总分100分，60分及格。一、单项选择题（共50题，每题2分。每题的备选项中，只有一个最符合题意） 1.Text 2SoBig. F was the more visible of tile two recent waves of infection, because it propagated itself by e-mail, meaning that victims noticed what was going on. SoBig. F was so effective that it caused sub

2、stantial disruption even to those protected by anti-virus software. That was because so many copies of the virus spread that many machines were overwhelmed by messages from their own anti-virus software. On top of that, one common counter-measure backfired, increasing traffic still furthers. Anti-vi

3、rus software often bounces a warning back to the sender of an infected e-mail, saying that the e-mail in question cannot be delivered because it contains a virus. SoBig. F was able to spoof this system by harvesting e-mail addresses from the hard disks of infected computers. Some of these addresses

4、were then sent infected e-mails that had been doctored to look as though they had come from other harvested addresses. The latter were thus sent warnings, even though their machines may not have been infected.Kevin Haley of Symantec, a firm that makes anti-virus software, thinks that one reason SoBi

5、g. F was so much more effective than other viruses that work this way is because it was better at searching hard-drives for addresses. Brian King, of CERT, an internet-security center at Carnegie- Mellon University in Pittsburgh, note that, unlike its precursors, SoBig. F was capable of multi- threa

6、ding: it could send multiple e-mails simultaneously, allowing it to dispatch thousands in minutes.Blaster worked by creating a buffer overrun in the remote procedure call. In other word, that means it attacked a piece of software used by Microsoft’s Windows operating system to allow one comput

7、er to control another. It did so by causing that software to use too much memory.Most worms work by exploiting weaknesses in an operating system, but whoever wrote Blaster had a particularly refined sense of humor, since the website under attack was the one from which users could obtain a program to

8、 fix the very weakness in Windows that the worm itself was exploiting.One way to deal with a wicked worm like Blaster is to design a fairy godmother worm that goes around repairing vulnerable machines automatically. In the case of Blaster someone seems to have tried exactly that with a program calle

9、d Welchi. However, according to Mr. Haley, Welchi has caused almost as many problems as Blaster itself, by overwhelming networks with pings - signals that checked for the presence of other computers.Though both of these programs fell short of the apparent objectives of their authors, they still caus

10、ed damage. For instance, they forced the shutdown of a number of computer networks, including the one used by the New York Times newsroom, and the one organizing trains operated by CSX, a freight company on America’s east coast. Computer scientists expect that it is only a matter of time befor

11、e a truly devastating virus is unleashed.We learn from the passage that Welchi is（）Aa wicked worm causing as many damages as Blaster did.Ba program designed by Haley to detect worms like Blaster.Ca program intended to fix the infected machines.Da worm meant to defeat the virus with pings.2.Text 2SoB

12、ig. F was the more visible of tile two recent waves of infection, because it propagated itself by e-mail, meaning that victims noticed what was going on. SoBig. F was so effective that it caused substantial disruption even to those protected by anti-virus software. That was because so many copies of

13、 the virus spread that many machines were overwhelmed by messages from their own anti-virus software. On top of that, one common counter-measure backfired, increasing traffic still furthers. Anti-virus software often bounces a warning back to the sender of an infected e-mail, saying that the e-mail

14、in question cannot be delivered because it contains a virus. SoBig. F was able to spoof this system by harvesting e-mail addresses from the hard disks of infected computers. Some of these addresses were then sent infected e-mails that had been doctored to look as though they had come from other harv

15、ested addresses. The latter were thus sent warnings, even though their machines may not have been infected.Kevin Haley of Symantec, a firm that makes anti-virus software, thinks that one reason SoBig. F was so much more effective than other viruses that work this way is because it was better at sear

16、ching hard-drives for addresses. Brian King, of CERT, an internet-security center at Carnegie- Mellon University in Pittsburgh, note that, unlike its precursors, SoBig. F was capable of multi- threading: it could send multiple e-mails simultaneously, allowing it to dispatch thousands in minutes.Blas

17、ter worked by creating a buffer overrun in the remote procedure call. In other word, that means it attacked a piece of software used by Microsoft’s Windows operating system to allow one computer to control another. It did so by causing that software to use too much memory.Most worms work by ex

18、ploiting weaknesses in an operating system, but whoever wrote Blaster had a particularly refined sense of humor, since the website under attack was the one from which users could obtain a program to fix the very weakness in Windows that the worm itself was exploiting.One way to deal with a wicked wo

19、rm like Blaster is to design a fairy godmother worm that goes around repairing vulnerable machines automatically. In the case of Blaster someone seems to have tried exactly that with a program called Welchi. However, according to Mr. Haley, Welchi has caused almost as many problems as Blaster itself

20、, by overwhelming networks with pings - signals that checked for the presence of other computers.Though both of these programs fell short of the apparent objectives of their authors, they still caused damage. For instance, they forced the shutdown of a number of computer networks, including the one

21、used by the New York Times newsroom, and the one organizing trains operated by CSX, a freight company on America’s east coast. Computer scientists expect that it is only a matter of time before a truly devastating virus is unleashed.The word doctored ( Line 9, Paragraph 1 ) probably means（）Acu

22、red a disease,Bdiagnosed a virus.Cbecame a doctor.Dchanged to deceive.3.Text 2SoBig. F was the more visible of tile two recent waves of infection, because it propagated itself by e-mail, meaning that victims noticed what was going on. SoBig. F was so effective that it caused substantial disruption e

23、ven to those protected by anti-virus software. That was because so many copies of the virus spread that many machines were overwhelmed by messages from their own anti-virus software. On top of that, one common counter-measure backfired, increasing traffic still furthers. Anti-virus software often bo

24、unces a warning back to the sender of an infected e-mail, saying that the e-mail in question cannot be delivered because it contains a virus. SoBig. F was able to spoof this system by harvesting e-mail addresses from the hard disks of infected computers. Some of these addresses were then sent infect

25、ed e-mails that had been doctored to look as though they had come from other harvested addresses. The latter were thus sent warnings, even though their machines may not have been infected.Kevin Haley of Symantec, a firm that makes anti-virus software, thinks that one reason SoBig. F was so much more

26、 effective than other viruses that work this way is because it was better at searching hard-drives for addresses. Brian King, of CERT, an internet-security center at Carnegie- Mellon University in Pittsburgh, note that, unlike its precursors, SoBig. F was capable of multi- threading: it could send m

27、ultiple e-mails simultaneously, allowing it to dispatch thousands in minutes.Blaster worked by creating a buffer overrun in the remote procedure call. In other word, that means it attacked a piece of software used by Microsoft’s Windows operating system to allow one computer to control another

28、. It did so by causing that software to use too much memory.Most worms work by exploiting weaknesses in an operating system, but whoever wrote Blaster had a particularly refined sense of humor, since the website under attack was the one from which users could obtain a program to fix the very weaknes

29、s in Windows that the worm itself was exploiting.One way to deal with a wicked worm like Blaster is to design a fairy godmother worm that goes around repairing vulnerable machines automatically. In the case of Blaster someone seems to have tried exactly that with a program called Welchi. However, ac

30、cording to Mr. Haley, Welchi has caused almost as many problems as Blaster itself, by overwhelming networks with pings - signals that checked for the presence of other computers.Though both of these programs fell short of the apparent objectives of their authors, they still caused damage. For instan

31、ce, they forced the shutdown of a number of computer networks, including the one used by the New York Times newsroom, and the one organizing trains operated by CSX, a freight company on America’s east coast. Computer scientists expect that it is only a matter of time before a truly devastating

32、 virus is unleashed.SoBig. F damaged computer programs mainly by（）Asending them an overpowering number of messages.Bharvesting the addresses stored in the computers.Cinfecting the computers with an invisible virus.Ddestroying the anti-virus software of the computers.4.Text 2SoBig. F was the more vis

33、ible of tile two recent waves of infection, because it propagated itself by e-mail, meaning that victims noticed what was going on. SoBig. F was so effective that it caused substantial disruption even to those protected by anti-virus software. That was because so many copies of the virus spread that

34、 many machines were overwhelmed by messages from their own anti-virus software. On top of that, one common counter-measure backfired, increasing traffic still furthers. Anti-virus software often bounces a warning back to the sender of an infected e-mail, saying that the e-mail in question cannot be

35、delivered because it contains a virus. SoBig. F was able to spoof this system by harvesting e-mail addresses from the hard disks of infected computers. Some of these addresses were then sent infected e-mails that had been doctored to look as though they had come from other harvested addresses. The l

36、atter were thus sent warnings, even though their machines may not have been infected.Kevin Haley of Symantec, a firm that makes anti-virus software, thinks that one reason SoBig. F was so much more effective than other viruses that work this way is because it was better at searching hard-drives for

37、addresses. Brian King, of CERT, an internet-security center at Carnegie- Mellon University in Pittsburgh, note that, unlike its precursors, SoBig. F was capable of multi- threading: it could send multiple e-mails simultaneously, allowing it to dispatch thousands in minutes.Blaster worked by creating

38、 a buffer overrun in the remote procedure call. In other word, that means it attacked a piece of software used by Microsoft’s Windows operating system to allow one computer to control another. It did so by causing that software to use too much memory.Most worms work by exploiting weaknesses in

39、 an operating system, but whoever wrote Blaster had a particularly refined sense of humor, since the website under attack was the one from which users could obtain a program to fix the very weakness in Windows that the worm itself was exploiting.One way to deal with a wicked worm like Blaster is to

40、design a fairy godmother worm that goes around repairing vulnerable machines automatically. In the case of Blaster someone seems to have tried exactly that with a program called Welchi. However, according to Mr. Haley, Welchi has caused almost as many problems as Blaster itself, by overwhelming netw

41、orks with pings - signals that checked for the presence of other computers.Though both of these programs fell short of the apparent objectives of their authors, they still caused damage. For instance, they forced the shutdown of a number of computer networks, including the one used by the New York T

42、imes newsroom, and the one organizing trains operated by CSX, a freight company on America’s east coast. Computer scientists expect that it is only a matter of time before a truly devastating virus is unleashed.What can we infer from the last paragraph（）AComputer scientists are quit optimistic

43、 about the existing anti-virus programs.BComputer scientists are looking forward to the coming anti-virus programs.CComputer scientists consider the existing viruses not the really destructive ones.DComputer scientists regard the coming viruses as the really destructive ones.5.Text 2SoBig. F was the

44、 more visible of tile two recent waves of infection, because it propagated itself by e-mail, meaning that victims noticed what was going on. SoBig. F was so effective that it caused substantial disruption even to those protected by anti-virus software. That was because so many copies of the virus sp

45、read that many machines were overwhelmed by messages from their own anti-virus software. On top of that, one common counter-measure backfired, increasing traffic still furthers. Anti-virus software often bounces a warning back to the sender of an infected e-mail, saying that the e-mail in question c

46、annot be delivered because it contains a virus. SoBig. F was able to spoof this system by harvesting e-mail addresses from the hard disks of infected computers. Some of these addresses were then sent infected e-mails that had been doctored to look as though they had come from other harvested address

47、es. The latter were thus sent warnings, even though their machines may not have been infected.Kevin Haley of Symantec, a firm that makes anti-virus software, thinks that one reason SoBig. F was so much more effective than other viruses that work this way is because it was better at searching hard-dr

48、ives for addresses. Brian King, of CERT, an internet-security center at Carnegie- Mellon University in Pittsburgh, note that, unlike its precursors, SoBig. F was capable of multi- threading: it could send multiple e-mails simultaneously, allowing it to dispatch thousands in minutes.Blaster worked by

49、 creating a buffer overrun in the remote procedure call. In other word, that means it attacked a piece of software used by Microsoft’s Windows operating system to allow one computer to control another. It did so by causing that software to use too much memory.Most worms work by exploiting weaknesses in an operating system, but whoever wrote Blaster had a particularly refined sense of humor, since the website under attack was the one from which users could obtain a program to fix the very wea