练习册

  • 练习册
  • 试题
    相关习题
     0  4635  4643  4649  4653  4659  4661  4665  4671  4673  4679  4685  4689  4691  4695  4701  4703  4709  4713  4715  4719  4721  4725  4727  4729  4730  4731  4733  4734  4735  4737  4739  4743  4745  4749  4751  4755  4761  4763  4769  4773  4775  4779  4785  4791  4793  4799  4803  4805  4811  4815  4821  4829  151629 

    科目： 来源： 题型：阅读理解

    They may be just passing your office, computer bag slung (悬挂) over one shoulder. Or they may be sitting in a car outside it, causally tapping away at a laptop. They look like innocent passers-by. In fact, they are stealing your corporate secrets.
    Drive-by hacking is the trendy term given to the practice of breaking into wireless computer networks from outside the buildings that house them. A recent study in the UK, sponsored by RSA Data Security, found that two-thirds of organizations with wireless networks were risking their data in this way. Security experts patrolled (巡逻) several streets in the City of London seeking evidence of wireless networks in operation.
    Of 124 that they identified, 83 were sending data without encrypting（加密）them. Such data could readily be picked up by a passer-by armed only with a portable computer, a wireless modem and a few pieces of software that can be freely downloaded from the Internet.
    The data could include sensitive company documents containing valuable information. Or they could be e-mail identities and passwords that could be used by hackers to log into corporate networks as if they were legal users.
    Most companies using wireless networking technology do not take even the simplest of measures to protect their data. Nearly all wireless network technology comes with some basic security features that need only to be activated (激活) in order to give a minimum level of security, for example, by encrypting the data being passed over the network.
    Raymon Kruck, business development manager at Check Point Software, a security technology specialist, believes this could be partly a psychological problem. People see the solid walls of their building as safeguards and forget that wireless networks can extend up to 200 meters beyond physical walls.
    Companies without any security at all on their wireless networks make it ridiculously easy for hackers to break in. Switching on the security that comes with the network technology should be automatic. Then there are other basic steps a company can take, says Mr. Kruck, such as changing the passwords on the network from the default (默认) setting.
    Companies can also install firewalls, which form a barrier between the internal network and the public Internet. They should also check their computer records regularly to spot any abnormal activity, which might betray the presence of a hacker.

    1. 1.

      According to the study sponsored by RSA Data Security, two thirds of the subjects _______.

      1. A.
        had most of their company data stolen
      2. B.
        depended on wireless computer networks
      3. C.
        were exposed to drive-by hacking
      4. D.
        were unaware of the risk of wireless hacking
    2. 2.

      Which of the following is NOT considered in the study?

      1. A.
        The number of computer hacking incidents.
      2. B.
        The number of wireless computer networks identified.
      3. C.
        The way in which data are sent and received.
      4. D.
        The way in which data are hacked and stolen.
    3. 3.

      Most wireless network technology has_________.

      1. A.
        data encryption program
      2. B.
        password security programs
      3. C.
        illegal-user detection
      4. D.
        firewall
    4. 4.

      Raymond Kruck most probably agrees that wireless network security involves ________.

      1. A.
        wireless signal administration
      2. B.
        changes in user’s awareness
      3. C.
        users’ psychological health
      4. D.
        stronger physical walls
    5. 5.

      The passage is most likely to be seen in a __________

      1. A.
        book review
      2. B.
        science fiction
      3. C.
        textbook
      4. D.
        computer magazine

    查看答案和解析>>

    科目： 来源： 题型：阅读理解


    When you visit America, you will see the word Motel on signs and notice boards. It is made up of “motor” and “hotel” and it is really a hotel for people who arrive by car (how-ever, you don’t need a car to stay at one). You have to pay when you arrive for your room, which usually has a bath. Meals are not provided, but there will certainly be a cafeteria (自助餐馆). Americans eat a lot of salads and sandwiches. Along the main roads there are a lot of motels. Each tries to offer more than next. Some provide television in every bedroom; others have swimming pools; and so on. Motels are especially useful when you are in the country, far from a town or city. You will also find them in the big National Parks.
    In these great National Parks, you may meet guests you don’t expect to see. An American friend told me a little story. In the middle of a moonless night she heard strange noises outside her motel window in the Yellowstone National Park in Wyoming. Thinking it might be a thief, she jumped out of bed, opened the door and crept towards a dark shadow. As she got close, she saw the thief. She was dreadfully frightened: it wasn’t a human thief — it was a big black bear. The bear was turning over some empty tins with its paw, looking for tasty bits of food. My friend decided to leave that particular thief alone!
    There are also, of course, places called “rooming houses”,  where they receive lodgers (房客). You will see such signs as Tourists or Rooms Rent, and you could try one of these. A word of warning — looking for a room in New York during the tourist season is like looking for gold on the moon!　

    1. 1.

      Which of the following is TRUE about motels?

      1. A.
        You can only find motels in the big National Parks
      2. B.
        They are free for people who arrive by car
      3. C.
        If you want to stay at a motel, you must have a car
      4. D.
        The word “motel” is formed by two words
    2. 2.

      Which of the following is NOT provided by motels?

      1. A.
        Baths
      2. B.
        Swimming pools
      3. C.
        TV
      4. D.
        Meals
    3. 3.

      The underlined word “crept” in the second paragraph probably means “_____”

      1. A.
        moved slowly
      2. B.
        rushed out
      3. C.
        threw away
      4. D.
        ran fast
    4. 4.

      From the last paragraph we can learn that in New York during the tourist season ______.

      1. A.
        tourists can find gold there
      2. B.
        tourists can have a sweet dream there
      3. C.
        it is difficult to find a room there
      4. D.
        there is warning for tourists to New York

    查看答案和解析>>

    科目： 来源： 题型：单选题

    ________ ,she is not exactly fat, but rather well-built for her age.


    1. A.
      When the doctor puts it
    2. B.
      When it is put by the doctor
    3. C.
      As is it put by the doctor
    4. D.
      As the doctor puts it

    查看答案和解析>>

    科目： 来源： 题型：阅读理解

    When nature is left alone, a balance is reached among the animals and plants living in one area. But when man starts his work in nature, the balance is likely to be destroyed. He grows a crop and takes it away to eat; then there are no dead leaves to fall on the ground, holding water while it sinks into the surface, or decaying (腐烂) and adding humus (腐殖质) to the soil. Unless a farmer acts with knowledge and skill, he is therefore most likely to make the land poorer. To take the place of the useful matter in the crops that he removes, he uses some kind of fertilizer. Chemical fertilizers are of great help, but the waste products of animals and decaying remains of plants should also be put on the land. In some places, it is a habit to burn waste material lying about, but such burning destroys the useful matter in the dead plants. Although the ashes that are left are valuable when put on the land, a better practice is to bury the waste so that it decays and increases the humus in the soil.
    In the past, when the world population was much lower than it is now, a man had little difficulty in ordinary times in growing the food that was needed. When a field had been used some years and had become tired, the farmer could move to another place. The tired land then slowly recovered. Gradually grasses and other plants would appear on it and its productive power would slowly return to normal through their decay. But nature, left alone, would take a long time to bring back the land to its former state; the length of time required would depend on local conditions, but it might well be ten years.
    It is a bad practice to grow the same crop in a field year after year. If the crop is changed, the land will suffer less because it is treated and used in a different way. Different plants have different effects on the soil. Therefore, a change of crop will do less harm than the growing of the same crop year after year and a regular change to grass will do good to the soil. Much will therefore be gained if different crops are grown one after another, a method known as the rotation (轮作) of crops.

    1. 1.

      According to the passage, the land will become poorer________.

      1. A.
        if all the dead leaves are cleared away         
      2. B.
        if the humus is increased after the harvest
      3. C.
        if dead leaves decay in the soil by themselves   
      4. D.
        if waste plant material lying about is buried
    2. 2.

      We can learn from the passage that the tired land has gradually recovered_______.

      1. A.
        when grasses and other plants appear again
      2. B.
        when the treatment is given by nature alone
      3. C.
        after new grasses and other plants have decayed again
      4. D.
        after nature has been left alone for several months
    3. 3.

      A modern farmer can hardly move to another place as he did before because_______.

      1. A.
        the productive power of a new field isn't higher than that of an old one
      2. B.
        there are few free fields left for him to do farming
      3. C.
        it takes a farmer more than ten years to start farming in a new field
      4. D.
        there will be too many grasses in a new field to grow crops
    4. 4.

      It is most likely that the author will go on to ______ in the paragraph following the passage above.

      1. A.
        introduce other methods of planting crops       
      2. B.
        deal with how to prevent land getting tired
      3. C.
        start another topic of how to make use of land
      4. D.
        explain what the rotation of crops is      

    查看答案和解析>>

    科目： 来源： 题型：阅读理解

    What kind of sports impressed you most during your childhood? Maybe racing around the playground or skipping rope for hours would bring you pleasure. At that time you weren’t thinking of fitness, you were just thinking of entertainment. But in this age of high-tech home equipment and underused gym memberships, the simple joy of jumping rope has been forgotten. I think rediscovering it probably will give you a total-body exercise.
    Although considered an excellent form of exercise, jumping rope has never received widespread acceptance because of two reasons. First,most people recognize jumping rope as an excellent form of cardiovascular (心血管的) exercise, but they also believe that it is simply too difficult. In other words, they don’t think they’ll be able to continue jumping for the near 20 minutes in order to achieve a beneficial physical effect. Second, many regard it as somewhat boring and overly repetitive —not as something fun or enjoyable.
    As a matter of fact, jumping rope can be great fun as long as you find a proper way to practise it. Instead of doing the usual two-foot bounce(跳) over and over again, players good at rope-jumping often change their pattern every 10 or 20 jumps. A single bounce, a double –bounce , a skip, a knee-up, side swings , as well as a variety of other easy-to-learn free-style rope-jumping .
    Nowadays researchers are discovering that jumping rope also prepares the brain for learning . It is an exercise allowing both brain hemispheres（半球）to perform equallyto each other . In short, jumping rope can be a life-long activity requiring little equipment, time and space , yet leading to a much healthier life.

    1. 1.

      The main purpose of the first paragraph is to tell us that         .

      1. A.
        people would rather have exercise in a gym than do sports outside
      2. B.
        there seems to be too much advanced equipment for people to use
      3. C.
        racing around the playground was regarded as children’s favorite sport
      4. D.
        jumping rope has escaped from people’s memories in modern society
    2. 2.

      One reason that can explain why rope jumping has not spread widely is that_____.

      1. A.
        it benefits the cardiovascular system
      2. B.
        it is too difficult for people to learn to jump
      3. C.
        it is believed to be boring and repetitive
      4. D.
        it requires little equipment, time and space
    3. 3.

      The first sentence in Paragraph 3 implies that       in rope jumping .

      1. A.
        there is only one proper way to follow
      2. B.
        the usual way should not be used again
      3. C.
        the easiest way is always the best one
      4. D.
        there are different kinds of ways to follow
    4. 4.

      According to the researchers , jumping rope          .

      1. A.
        only prepares the brain for learning
      2. B.
        is suitable for students only
      3. C.
        helps both brain hemispheres work together
      4. D.
        can be dangerous for old people
    5. 5.

      What is the author’s attitude towards rope jumping ?

      1. A.
        He strongly argues against it.
      2. B.
        He is in favour of it.
      3. C.
        He is sitting on the fence of it .
      4. D.
        He knows little about it .

    查看答案和解析>>

    科目： 来源： 题型：单选题

    It’s reasonable to demand ________．


    1. A.
      equal pay for equal work
    2. B.
      equally pay for equally work
    3. C.
      equality pay for equality work
    4. D.
      equal pay to equal work

    查看答案和解析>>

    科目： 来源： 题型：阅读理解

    People should be warned against using mobile phones outdoors in stormy weather because they may“be struck by lightning”，according to doctors.
    Three experts have described how a teenage girl was struck by lightning while using her phone in a large London park.The girl，aged 15，recovered，but a year later was still wheelchair-bound and found to be suffering complex physical and emotional problems.
    The girl also had a perforate eardrum(打孔耳膜)on the side where she had been holding the mobile phone.She was having general recovery in Northwick Park Hospital，Middlesex.
    Swinda Esprit，a senior house officer, said that while the brain and muscle damage was similar to that of many lightning victims—who can experience heart attacks on being struck—the ear problems were not.
    She said that the damages were particularly relevant for people who might be involved in less serious lightning incidents，who might otherwise recover, but would never get their full hearing back if struck while on the phone.
    “We were shocked by the damage，which is why we wanted to draw attention to it，”Dr Esprit said.“A year on and she still was suffering these difficult hearing.”
    They added that three other cases had been reported in newspapers in China，South Korea，and Malaysia.In the Malaysian case，a sales executive was killed by lightning while talking on his phone during a thunderstorm near Kuala Lumpur.
    “All these events resulted in death，”the doctors wrote.“This rare phenomenon is a public health issue，and education is necessary to stress the risk.”
    The Australian Lightning Protection Standard recommends that metallic objects，including cordless or mobile phones，should not be carried outdoors during thunderstorms.However, “the United States National Weather Service says on its website that both are safe to use “because there is no direct path between you and the lightening”.
    Paul Taylor, of “the Met Office'’，said the ear injuries were a consequence of mobile phones being metal，and not related to radio waves.
    Mr. Taylor said that mobile phones should be treated as another piece of metal，similar to carrying coins or wearing rings，and people need to be warned against the possible danger.

    1. 1.

      What do we know about the teenage girl?

      1. A.
        She was struck by lightning at schoo1.
      2. B.
        She completely recovered from being struck.
      3. C.
        She still suffered from mental problems.
      4. D.
        She had to press her ear all day.
    2. 2.

      It can be inferred that damage done by lightening while using mobile phones      .

      1. A.
        is more serious than that when one is not using a mobile phone
      2. B.
        can be healed quickly except for heart attacks
      3. C.
        is less serious because the victims can usually recover
      4. D.
        is mainly in the brain and muscle of the victims
    3. 3.

      Why did doctors stress the risk about using phones outside in lightening?

      1. A.
        Because more people are faced with it.
      2. B.
        Because some deaths have been caused.
      3. C.
        Because lightning is harmful for the brain.
      4. D.
        Because a teenage girl got killed.
    4. 4.

      We can infer from the last three paragraphs that        .

      1. A.
        both cordless and mobile phones are safe to use outside in lightning
      2. B.
        there is no direct connection between lightning and ear injuries at all
      3. C.
        opinions differ as to whether it is safe to use mobiles phones in lightning
      4. D.
        ear injuries are the result of carrying coins or wearing rings in lightning
    5. 5.

      The purpose in writing this passage is       .

      1. A.
        to draw attention to the risk of using mobile phones in lightening
      2. B.
        to focus on various damages done to lightning victims
      3. C.
        to tell us the news that a teenage girl was struck by lightning
      4. D.
        to stress the danger of making phone calls in lightning

    查看答案和解析>>

    科目： 来源： 题型：阅读理解

    A casual employee is one who is engaged and paid as such by agreement between the employer and employee.  There is a three-hour minimum payment for each period of engagement and a four-hour minimum engagement on a Public Holiday.  No notice of termination is required.  For night work between 8:00 p.m. and 7:00 a.m. Monday to Friday a penalty of $1.28 per hour (or part of hour) shall be paid with a minimum of $4.37 for any one day on which such hours are worked.
    Meals: Casual employees whose engagement extends for five hours or more shall be provided with a meal free of charge, or shall be paid in lieu of $5.00 ($6.00 from 1 May 1996)
    Casual employment over eight hours: Paid at the overtime rate of full time employees.
    Payment of wages: By mutual consent either weekly or on termination of engagement.
    Annual leave: Pro-rata Annual Leave entitlement for casuals is on the basis of 1/12th of earnings. Many employers pay this inclusive with the hourly rate.  If this is not done, it should be paid on termination of services or at the end of 12 months’ service.
    Special clothing: A casual employee is required to provide and wear a black and white uniform or an equivalent standard specified by the club (e.g. blue and white, cook’s clothing, etc.) this includes how tie and cummerbund if required by the employer.  The employer may launder all uniforms, or pay the employee and allowance of $1.00 per engagement ($1.20 from 1 May 1996) for general staff.  Cooks shall be paid $1.50 per engagement ($1.70 from 1 May 1996).

    1. 1.

      Casual employees must be given a free meal or a meal allowance if they ______.

      1. A.
        work after 7:00 a.m.
      2. B.
        work over five hours a day
      3. C.
        have had 12 months’ service
      4. D.
        are paid $5.00
    2. 2.

      In casual employment, notice of termination is ______.

      1. A.
        not possible
      2. B.
        not necessary
      3. C.
        provided
      4. D.
        paid in lieu
    3. 3.

      Which of the following sentences best sums up the situation of casual staff?

      1. A.
        The employers of casual staff are well protected by regulations.
      2. B.
        Casual staff need to provide their own uniforms.
      3. C.
        The rights and conditions of casual staff are clearly specified.
      4. D.
        The conditions of casual staff are as good as those of full-time staff.

    查看答案和解析>>

    科目： 来源： 题型：阅读理解

    A university is not just about careers and getting a well-paid job after graduation — it’s a place for learning about yourself and the world.
    So how to select a suitable university is of great importance. How do you decide on a school when there are thousands of them to pick from? Start by asking yourself questions about your preferences:
    What are my strengths?
    1.Am I interested in liberal arts or science or business?
    2.What kind of learning environment is best for me?
    3.Would I be more comfortable in a small school or a large one?
    4.Do I want to stay close to home or live far away?
    5.Would I prefer to be in a city environment or a small college town?
    6.Do I like being with people who are mostly like me or do I want to meet a different group?
    Ask friends and older people who are in college about their schools and about other schools they’re familiar with. Talk to one of your teachers and go to college fairs when they visit your town.
    Once you’ve narrowed down your choices, ask the schools to send you related materials and visit their websites. When you’ve cut your list down to a manageable number, make arrangements to visit. Try to do this when the schools are having regular classes, so you can get a good idea of what life is really like on campus.
    And remember: you’re not the only one making a decision. Schools are picking from a large pool of students. They want to know how excellent you are and what makes you stand out from everyone else. They will look at your school performance, test scores, and so on, so it’s important to devote time and effort to all these things.

    1. 1.

      According to the passage, when deciding on a college you need NOT consider ______.

      1. A.
        in which aspect you are superior to others
      2. B.
        what kind of people you’d like to meet
      3. C.
        what kind of college environment you like
      4. D.
        whether the college has an exchange-student program
    2. 2.

      When you have got a manageable number of choices, you’d better _______.

      1. A.
        visit the schools when they have regular classes
      2. B.
        ask the schools to send you related materials
      3. C.
        go to college fairs with your friends
      4. D.
        discuss them with your teachers
    3. 3.

      The underlined part in the last paragraph means that ______.

      1. A.
        you can’t make the decision all by yourself
      2. B.
        schools are also judging whether you’re qualified for them
      3. C.
        your school grades often play a role in choosing a college
      4. D.
        making a decision all by yourself is really hard

    查看答案和解析>>

    科目： 来源： 题型：单选题

    I have not missed a play ________ concert ________ I was seventeen years old.


    1. A.
      nor, when
    2. B.
      or, when
    3. C.
      or, since
    4. D.
      not, since

    查看答案和解析>>

    同步练习册答案