题目内容
（请给出正确答案）
A．of his being ever there
B．he ever has been there
C．of his having ever been there
D．of him having ever been there
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（由简答题聘请的专业题库老师提供的解答）
更多“A hacker could take control of the entire system by implanting his own instructions in the”相关的问题
A．of his being ever there
B．he ever has been there
C．of his having ever been there
D．of him having ever been there
A．entering into computers illegally
B．creating many electronic-age terms
C．removing computer systems
D．going through computer systems
It can be reasonably inferred from the passage that ______.
A．the "hackers" are largely dependent on their teachers to take care of their routine life
B．university computer centers are open to almost everyone
C．university computer centers are expecting outstanding programmers out of the "hackers"
D．the "hacker" phenomenon is partly attributed to the insufficiency of the computer centers
It's a fact not lost on American educators, who amid rising math failure rates are debating how math can better meet the real-life needs of students. Should we change the way math is taught in schools, or eliminate some courses entirely？
Andrew Hacker, Queens College political science professor, thinks that advanced algebra and other higher-level math should be cut from curricula in favor of courses with more routine usefulness, like statistics.
"We hear on all sides that we're not teaching enough mathematics, and the Chinese are running rings around us," Hacker says. "I'm suggesting we're teaching too much mathematics to too many people. . . not everybody has to know calculus. If you're going to become an aeronautical (航空的)engineer, fine. But most of us aren't."
Instead, Hacker is pushing for more courses like the one he teaches at Queens College： Numeracy 101. There, his students of "citizen statistics" learn to analyze public information like the federal budget and corporate reports. Such courses, Hacker argues, are a remedy for the numerical illiteracy of adults who have completed high-level math like algebra but are unable to calculate the price of, say, a carpet by area.
Hacker's argument has met with opposition from other math educators who say what's needed is to help students develop a better relationship with math earlier, rather than teaching them less math altogether.
Maria Droujkova is a founder of Natural Math, and has taught basic calculus concepts to 5-year-olds. For Droujkova, high-level math is important, and what it could use in American classrooms is an injection of childlike wonder.
"Make mathematics more available," Droujkova says. "Redesign it so it's more accessible to more kinds of people: young children, adults who worry about it, adults who may have had bad experiences. "
Pamela Harris, a lecturer at the University of Texas at Austin, has a similar perspective. Harris says that American education is suffering from an epidemic of "fake math"一an emphasis on rote memorization (死记硬背)of formulas and steps, rather than an understanding of how math can influence the ways we see the world.
Andrew Hacker, for the record, remains skeptical.
"I'm going to leave it to those who are in mathematics to work out the ways to make their subject interesting and exciting so students want to take it," Hacker says. "All that I ask is that alternatives be offered instead of putting all of us on the road to calculus. "
46. What does the author say about ordinary Americans？
A) They struggle to solve math problems.
B) They think math is a complex subject.
C) They find high-level math of little use.
D) They work hard to learn high-level math.
47. What is the general complaint about America's math education according to Hacker？
A) America is not doing as well as China.
B) Math professors are not doing a good job.
C) It doesn't help students develop their literacy.
D) There has hardly been any innovation for years.
48. What does Andrew Hacker's Numeracy 101 aim to do？
A) Allow students to learn high-level math step by step.
B) Enable students to make practical use of basic math.
C) Lay a solid foundation for advanced math studies.
D) Help students to develop their analytical abilities.
49. What does Maria Droujkova suggest math teachers do in class？
A) Make complex concepts easy to understand.
B) Start teaching children math at an early age.
C) Help children work wonders with calculus.
D) Try to arouse students' curiosity in math.
50. What does Pamela Harris think should be the goal of math education？
A) To enable learners to understand the world better.
B) To help learners to tell fake math from real math.
C) To broaden Americans' perspectives on math.
D) To exert influence on world development.
There are basic guidelines to bear in mind. First, don't use as a password your name or that of a member of your family, even in modified form. Also avoid use of your telephone number, your Social Security number, or your address. Such information can easily be obtained by a determined hacker (黑客).
In addition, if possible, don't use passwords made up entirely of letters or digits. A relatively simple computer program can crack such a code quickly: Finally, do not use a word that can be found in any dictionary, even a foreign-language one. Huge lists are available that contain words, place names, and proper names from all languages. Programs can test for variations of these words, such as if they are spelled backward, capitalized, or combined.
So, what kinds of passwords should be used？ Usually ones that have a minimum of six to eight characters and that have a mixture of upper-and lower-case letters, digits, and punctuation (标点) symbols. How difficult is it to crack such a combination of characters？ One source says that "a machine that could try one million passwords per second would require, on the average, over one hundred years."
How can you choose a combination that is easy to remember？ Some suggest that you take the title of a favorite book or film or a line from a song or poem and use the first latter from each word as your password, adding capital letters, punctuation, or other characters. For example, "to be or not to be" could become "2B/not2B".
Other suggestions include taking two short words and link them with a punctuation character, such as "High？Bug" or "Song; Tree".
Taking into account the suggestions outlined above can help you to protect important information from unwanted hackers. Remember, too, the importance of changing your passwords regularly. Just a final comment, whatever passwords you decide to use, don't pick any of the examples given above.
What is the main idea of this passage？
A．How to strengthen security through a password.
B．How to choose a password that is easy to remember.
C．How to prevent your password from being cracked.
D．How to choose a safe and convenient password.
2 The British government announced the vulnerability in core Internet technology on Tuesday. Left unaddressed, experts said, it could allow hackers to knock computers offline and broadly disrupt vital traffic-directing devices, called routers, that coordinate the flow of data among distant groups of computers.
3 "Exploitation of this vulnerability could have affected the glue that holds the Internet together," said Roger Cumming, director for England's National Infrastructure Security Coordination Centre.
4 The Homeland Security Department issued its own cyberalert hours later that attacks "could affect a large segment of the Internet community." It said normal Internet operations probably would resume after such attacks stopped. Experts said there were no reports of attacks using this technique.
5 The risk was similar to Internet users "running naked through the jungle, which didn't matter until somebody released some tigers," said Paul Vixie of the Internet Systems Consortium Inc.
6 "It's a significant risk," Vixie said. "The larger Internet providers are jumping on this big time. It's really important this just gets fixed before the bad guys start exploiting it for fun and recognition."
7 The flaw affecting the Internet's "transmission control protocol," or TCP, was discovered late last year by a computer researcher in Milwaukee. Paul Watson said he identified a method to reliably trick personal computers and routers into shutting down electronic conversations by resetting the machines remotely.
8 Routers continually exchange important updates about the most efficient traffic routes between large networks. Continued successful attacks against routers can cause them to go into a standby mode, known as "dampening," that can persist for hours.
9 Experts previously said such attacks could take between four years and 142 years to succeed because they require guessing a rotating number from roughly 4 billion possible combinations. Watson said he can guess the proper number with as few as four attempts, which can be accomplished within seconds.
10 Cisco Systems Inc., which acknowledged its popular routers were among those vulnerable, distributed software repairs and tips to otherwise protect large corporate customers. There were few steps for home users to take; Microsoft Corp. said it did not believe Windows users were too vulnerable and made no immediate plans to update its software.
11 Using Watson's technique to attack a computer running Windows "would not be something that would be easy to do," said Steve Lipner, Microsoft's director for security engineering strategy.
12 Already in recent weeks, some U. S. government agencies and companies operating the most important digital pipelines have fortified their own vulnerable systems because of early warnings communicated by some security organizations. The White House has expressed concerns especially about risks to crucial Internet routers because attacks against them could profoundly disrupt online traffic.
13 "Any flaw to a fundamental protocol would raise significant concern and require significant attention by the folks who run the major infrastructures of the Internet," said Amit Yoran, the government's cyber security chief. The flaw has dominated discussions since last week among experts in security circles.
14 The public announcement coincides with a presentation Watson expects to make Thursday at an Internet security conference in V
A．Serious flaw uncovered in a core Internet technology had attracted international attention.
B．The Internet is held together by the glue.
C．Normal Internet operations may survive the hacker attacks.
D．Hackers could attack computers without getting online.
Woman: Jim O'Brien heads the UK division of American PC company Hacker. Mr O'Brien, thank you very much for sparing us a few minutes of your busy schedule.
Man: Hello. It's a pleasure. And please call me Jim.
Woman: Well, Jim, can we start by going through a typical day for you？
Man: I usually get up at around 5am. I drive in from my house to the office in London. I get very frustrated sitting in traffic jams so I leave early to beat the rush. I enjoy driving in, it's nice to get away on my own.
Woman: That's certainly an early start!
Man: Yes, well, at 6.30am, I get into the office. I use the time to get through my post and do the things that are difficult to do during the normal working day because of people wanting to see me. Between the hours of 8 and 9 1 take care of any European business which needs doing.
Woman: What a schedule! Do you find it exhausting？
Man: Exhausting, no. But, unfortunately most of my time is spent in meetings now, which doesn't really suit my type of personality. I much prefer the hands-on approach - I would rather be out chatting to people than sitting in the boardroom preparing policies and strategies - but that is a luxury I can't afford.
Woman: Could you tell us how you started with Hacker？
Man: I got into Hacker almost by accident. I was chief executive of a meat trading firm called FMC Harris, which was subject to a hostile take-over. At 9am one morning my boss was fired, and by 9.10am I was ont too. I spent eight weeks with no job, a wife and children to support, and a house to pay for. Then I was approached by Hacker to set up a UK branch for them. I was reluctant at first, but after a trip to Hacker's headquarters in the US to discuss it, I was chasing them!
Woman: It's a big company. Who do you actually work with on a daily basis？
Man: The rest of the management team arrives at around 9am. I work closely with a team of six, including my PA, Alice Lang. She is an integral part of the management system. I was lucky to find her, as it's almost impossible to find the right person for the job. The ideal employee is someone who is willing to work hard and someone who can adapt to the way we work.
Woman: Uh-huh. Right, so let's get you up to lunch-time. After your early start, you must be ready for lunch quite early, too.
Man: Yes, though the actual time varies from day to day. I try to avoid business lunches because I still have the afternoon ahead to contend with. I don't enjoy lengthy meals. So I usually just have a sandwich in the office with Alice.
Woman: And are there any changes planned for the future？
Man: People ask me if I get frustrated or bored, but the job changes constantly. This year we are moving away from wholesale office sales and more into high street retail sales of home computers. This is new ground for Hacker and presents me with a fresh set of challenges.
Woman: Jim, we hear a lot about people working long hours these days. When do you finish work？
Man: I am not the sort of person who enjoys working late. I try to get home by 7. I won't work late at the office sitting behind the desk because I can do something like that equally well at home. But there's no way to avoid entertaining and meeting people in the evening, so two or three nights a week I stay in town. I try to keep work and the weekend totally divorced. The week's devoted to Hacker, but the weekend is devoted to myself and my family.
Woman: Jim, thank you very much. It's been most interesting, and I'm sure our listeners have learnt a lot.
Man: Thank you. I've enjoyed it. And if you need any new computers for your offices ...
Woman: ... we know who to call!
•You will hear a radio presenter interviewing a businessman called Jim O'Brien.
•For each question 23-30, mark one letter (A, B or C) for the correct answer.
•After you have l
A．he enjoys driving his car fast.
B．he wants to avoid the heaviest traffic.
C．he lives a long way from his office.
—Excuse me, could I take this seat？ —Sorry, __________.
A. here it is
B. take it
C. it isn’t
D. it’s taken
What could he do ______ what he had said？
A．was to take back
B．but to take back
C．but take back
D．was take back
A.for pleasure
B.I could
C.my pleasure
D.more pleasure
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