Scientists are not sure how the brain follows the tracks of time．One theory holds that it has a group of cells specialized to record the intervals （间隔）of time, while another theory holds that some neural processes （神经突）act as an inside clock．
Whichever theory it may be, studies find, the cells have a poor grasp of longer interval．Time does seem to slow during an empty afternoon and race when the brain focuses on challenging work．Stimulants （兴奋剂）, including caffeine, tend to make people feel as if．time is passing faster; complex jobs, like doing taxes, can seem to drag on longer than they actually do．And  emotional  events — a breakup, a promotion, a transformative trip abroad —tend to be sensed as more recent than they actually are, by months or even years．In short, some psychologists say, the findings support the philosopher Martin Heidegger' s observation that time "persists merely as a consequence of the events taking place in it．"
Now researchers are finding that the opposite thing may also be true: if very few events come to mind, then the sense of time does not persist; the brain shortens the interval that has passed．
In one classic experiment, a French explorer named Michel Siffre lived in a cave for two months, cut off from the rhythms of night and day and man-made clocks．He appeared then, convinced that he had been isolated for only 25 days．Left to its own devices, the brain tends to shorten time．
In earlier work, researchers found  that a similar case at work in people’s judgment of intervals that last only moments．Relatively infrequent stimuli, like flashes or tones, tend to increase the speed of the brain' s internal pacemaker．
On an obvious level, these kinds of findings offer an explanation for why other people' s children seem to grow up so much faster than one's own．Involved parents are all too well aware of first step in their own children; however, seeing a cousin's child once every few years, without bothering memories, shortens the time．
【小题1】What can we infer from the first paragraph?

A．Michel Siffre didn' t think he had stayed in the cave for as long as two months．

B．Parents tend to think their own children grow faster than others．

C．Michel Diffre actually stayed in the cave for twenty-five days．

D．Children usually bring bad memories to their parents．

The modern age is an age of electricity. People are so used to electric lights, radio, televisions, and telephones that it is hard to imagine what life would be like without them. When there is a power failure, people grope about in flickering candlelight, cars hesitate in the streets because there are no traffic lights to guide them, and food spoils in silent refrigerators.
Yet, people began to understand how electricity works only a little more than two centuries ago. Nature has apparently been experimenting in this field for million of years. Scientists are discovering more and more that the living world may hold many interesting secrets of electricity that could benefit humanity.
All living cells send out tiny pulses of electricity. As the heart beats, it sends out pulses of record; they form an electrocardiogram, which a doctor can study to determine how well the heart is working. The brain, too, sends our brain waves of electricity, which can be recorded in an electroencephalogram. The electric currents generated by most living cells are extremely small，often so small that sensitive instruments are needed to record them. But in some animals, certain muscle cells have become so specialized as electrical generators that they do not work as muscle cells at all. When large numbers of these cells are linked together, the effects can be astonishing.
The electric eel is an amazing storage battery. It can send a jolt of as much as eight hundred volts of electricity through the water in which it lives. ( An electric house current is only one hundred and twenty volts, but two hundred and twenty volts in China.) As many as four-fifths of all the cells in the electric eel's body are specialized for generating electricity, and the strength of the shock it can deliver corresponds roughly to length of its body
56. Electricity was invented ______.
A. when man had no candles                  
B. about 200 years ago
C. to be operating computers.                          
D. by Thomse Edison
57. The following things can send out pulses of electricity except______.
A. electric eels and human hearts.
B. Electrical generators and animal muscle.
C. Stones and dry wood.
D. human brain and living cells.
58. The electric current send out by an eel can be
A. as much as 800 volts.                   B. about one hundred and twenty volts.
C. as high as the house current in China.      D. stored in the water where it lives.
59. From this shot passage we can infer _____.
A. the shorter an eel is, the stronger electricity it produces.
B. we can always feel the electricity produced by living cells.
C. human beings get their knowledge about electricity from nature.
D. people learn about electricity from eels.

Writing articles about films for The Front Page was my first proper job．Before then I had done bits of reviewing --- novels for other newspapers, films for a magazine and anything I was asked to do for the radio．That was how I met Tom Seaton, the first arts editor of The Front Page, who had also written for television．He hired me, but Tom was not primarily a journalist, or he would certainly have been more careful in choosing his staff．

    At first, his idea was that a team of critics should take care of the art forms that didn’t require specialized knowledge: books, TV, theatre, film and radio．There would be a weekly lunch at which we would make our choices from the artistic material that Tom had decided we should cover, though there would also be guests to make the atmosphere sociable．

   Tom’s original plan for a team of critics for the arts never took off．It was a good idea, but we didn’t get together as planned and so everything was done by phone．It turned out, too, that the general public out there preferred to associate a reviewer with a single subject area, and so I chose film．Without Tom’s initial push, though, we would hardly have come up with the present arrangement, by which I write an extended weekly piece, usually on one film．

    The space I am given allows me to broaden my argument --- or forces me, in an uninteresting week, to make something out of nothing．But what is my role in the public arena（舞台）? I suppose that people choose what films to go to on the basis of the stars, the publicity of the director．So if a film review isn’t really a consumer guide, what is it? I certainly don’t feel I have a responsibility to be ‘right’ about a movie．Nor do I think there should be a certain number of ‘great’ and ‘bad’ films each year．All I have to do is put forward an argument．I’m not a judge, and nor would I want to be．

What do we learn about Tom Seaton from the first paragraph?

       A．He encouraged Mark to become a writer．

       B．He had worked in various areas of the media．

       C．He met Mark when working for a film company．

       D．He prefers to employ people that he knows．

The weekly lunches were planned in order to ______．

       A．help the writers get to know each other

       B．provide an informal information party

       C．divide the work that had to be done

       D．entertain important visitors from the arts

What does the author mean when he says that Tom’s plan ‘never took off’ in Paragraph 3?

       A．It was unpopular．               B．It wasted too much time．

       C．It wasn’t planned properly．     D．It wasn’t put into practice．

Which of the following best describes what Mark says about his work?

       A．His success varies from year to year．   B．He prefers to write about films he likes．

       C．He can freely express his opinion．     D．He writes according to accepted rules．

Scientists studying the impact of climate change on the Arctic need to consider ways to reduce their own carbon footprints(碳排放量), says Ryan Brook, a researcher who regularly flies north to study the health of caribous(驯鹿).He calls on scientists to show leadership by examining and sharing ways to reduce the impact of working in polar regions.
“The importance of the research is not at question here. It is important to our understanding of and adapting to climate change. But we need to think about better approaches,” says Brook.
“This is an issue for all scientists, though polar researchers often travel particularly long distances using commercial air travel. We also rely extensively on small aircraft, icebreakers, and snowmobiles, all of which produce large amounts of carbon.”
Brook studies the health of caribou herds in Nunavut and Northwest Territories. He works with northern wildlife managers. This work typically takes him north five or six times per year and when he calculated his own carbon footprint, he was not happy with the result.
“My research footprints are about the same as the annual footprints of an average Toronto resident. Basically, I have two footprints — my own personal life, which is moderate, and my research footprint.”
Climate scientists can rightly argue that Arctic research is a specialized field and the community of scientists who travel north is relatively small. Even if all scientists working in the north reduced their carbon emissions, it would not make a big impact on the global scale. For Brook, it’s the option that matters.
There are ways researchers can reduce the amount of carbon they use. Some helicopters use less fuel than others. Solar and wind power are alternatives to gas-fired generators. And while carbon offsets(抵消) don’t reduce the amount of carbon emitted, they are an easy first step.
“There aren’t necessarily any easy answers, but we need to start talking about it,” says Brook. “This is particularly important for the next generation of scientists being trained and I hope to see them become leaders in this issue.”
【小题1】What did Brook find when he calculated his own carbon footprints?

If you know exactly what you want, the best way to get a job is to get specialized training. A recent report shows that companies like graduates in such fields as business and health care who can go to work immediately with very little on-the-job training.

    That’s especially true of booming fields that are challenging for workers. At Cornell's School of Hotel Administration, for example, bachelor's degree graduates get an average of four or five job offers with salaries ranging from the high teens to the low 20s and plenty of chances for rapid advancement. Large companies especially like a background of formal education coupled with work experience. But in the long run, too much specialization does not pay off. Business, which has been flooded with MBAs, no longer considers the degree an automatic stamp of approval. The MBA may open doors and command a higher salary initially, but the impact of a degree washes out after five years.

As further evidence of the erosion of corporate faith in specialized degrees, Michigan State’s Scheetz cites a pattern in corporate hiring practices. Although companies tend to take on specialists as new hires, they often seek out generalists for middle and upper-level management. This sounds like a formal statement that you approve of the liberal-arts(文科) graduate. Time and again labor-market analysts mention a need for talents that liberal-arts majors are assumed to have: writing and communication skills, organizational skills, open-mindedness and adaptability, and the ability to analyze and solve problems. David Birch, manager of the Boston Red Sox, says that he does not hire anybody with an MBA or an engineering degree. “I hire only liberal-arts people because they have a less-than-canned way of doing things,” says Birch.

For a liberal – arts degree, students focus on some basic courses that include literature history, mathematics, economics, science, human behavior and a computer course or two. With these useful and important courses, you can feel free to specialize, “A liberal-arts degree coupled with an MBA or some other technical training is a very good combination in the marketplace,” says Scheetz.

67．The job market is in great need of people with          .

       A．special training in special fields

       B．a bachelor’s degree in education

       C．formal schooling and work experience

       D．an MBA degree from top universities

68．The underlined sentence in Paragrph 2 means         .

       A．an MBA degree does not help in future promotion

       B．MBA programs will not be as popular as they are now

       C．people will not forget the degree the MBA graduates have got

       D．most MBA programs fail to provide students with a foundation

69．David Birch says that he only hires liberal – arts people because          .

       A．they will follow others’ ways of solving problems

       B．they can do better in bundling changing situations

       C．they are well trained in a variety of specialized fields

       D．they have attended special programs in management

70．The author supports the idea that          .

       A．on – the – job training is less costly in the long run

       B．formal schooling is less important than job training

       C．specialists are more expensive to hire than generalists

       D．generalists will do better than specialists in management