填空题"I'm just bad at math." "Everyone can run faster than me." It's not unusual for us to hear our preteens labeled themselves this way. According to Judy Amall, author of Discipline without Distress, this diminished self-confidence is a common problem in the preteen years. "Kids are more aware and sensitive about how other people see them at this age," she says. "Girls, in particular, often seem to lose their voices in the classroom because boys tend to interrupt more and talk over them." Parents need to be careful about this kind of labeling. Sometimes we attempt to reassure a child who has done badly on a test at school by saying, "Well, you're just not good at spelling." But this can discourage the child from trying to improve. Children also hear the ways we label ourselves. If a girl hears her mother say, "Oh, I'm just stupid when it comes to remembering things," then it seems OK to describe herself as stupid. Besides avoiding these labels, there are a number of positive things parents can do to boost their preteen's self-confidence. 1. Really listen. It means a lot to children to have an adult pay attention to them and respect their thoughts and opinions. When they talk to you, ask questions to draw them out and help them think things through. 2. Build skills. Confidence comes from knowing what you can do. So parents need to keep challenging their preteens a bit beyond their comfort level. Amall recommends assigning some non-traditional chores so girls get good at mowing the lawn and boys master cleaning toilets. Leaning other skills helps too. Help them speak up. Public-speaking skills help kids organize and express their thoughts, and will be valuable throughout their lives. If they don't get opportunities for public speaking in school, consider enrolling them in after-school clubs. 3. Focus on abilities, not appearance. Preteens can't help but be aware of the emphasis our society puts on looks, and the changes that come with the onset of puberty make them more self-conscious. "Don't reinforce that, Amall says, "It's better to point out the things they have accomplished, even if it's getting high points in video games." Treat mistakes as opportunities for learning. When a child does something wrong, don't scold or blame. Instead, you can ask, "What did you learn from this?" This is a great age to make a lot of mistakes, try things out, to learn what works and what doesn't. 4. Coach from the sidelines. When you jump in and intervene, you may make your child feel you don't have confidence in her ability to handle the situation. But you can help her make a plan and support her as she makes her own decisions about what to do. 5. Show unconditional love. "Tell them and show them you love them every day," Amall says. "When you are feeling over-whelmed by life, it means a lot to have the love and support of your parents." A. Have family meetings where your preteen can participate in making decisions about things like family vacations and activities. It gives kids confidence to know you value what they say. B. Parents are important role models in this area. Girls hear their mothers complain about their weight or their lips being too thin, and they would look for flaws in themselves. C. Touch still matters, even if it's just a pat on the head or a quick shoulder rub. Another way of showing affection is taking the time to work with your child when he/she feels discouraged. This will help a lot. D. For example, let's say your daughter isn't invited to a birthday party that many of her friends are going to. It might be very tempting to call the parents hosting the party and ask why your daughter wasn't invited—but a better approach might be to discuss options with your daughter. What can she do? She could confront the friend directly and ask why she was excluded, or perhaps she could approach the friend with humor ("I think the dog might have eaten my invitation before I got it."). It's up to her to decide what to do and how she'll handle things if she doesn't get the outcome she wants. E. When you read with enthusiasm—using voices, expressing the excitement and suspense of the story, kids are more likely to listen attentively. The most important thing, is that the experience is warm and connected—encourage her to share in the reading task but don't insist. F. Elisa Brook's 10-year-old son, Owen, was discouraged by his lack of progress in piano lessons. "He really didn't like to practice," Brook says. "I would sit with him and encourage him, and we worked through one bar at a time. It was slow at first, but we persisted and at the end of the year, he got 92 percent on the exam and was so proud of what he'd accomplished. /

填空题 While Americans have become ever more dependent upon electricity in their daily lives, a crucial part of the system that supports their way of life has not kept up. Yes, the country has built more power plants-enough to create a glut of power in most parts of the country. (41) __________. California's disastrous partial energy deregulation and the role played by Enron and other energy marketing companies in its power crisis have impeded changes in the national ability to deliver power. (42) __________. Moreover, the deficiency also includes inadequate coordination among the regions in managing the flow of electricity. These interregional weaknesses are so far the most plausible explanation for the blackout on Thursday. (43) __________. The problem is with the system of rules, organization, and oversight that governs the transmission networks. It was set up for a very different era and is now caught in a difficult transition. The transmission networks were built to serve a utility system based on regulated monopolies. In the old days, there was no competition for customers. Today, the mission is to connect buyers and sellers seeking the best deal, irrespective of political boundaries and local jurisdictions. (44) __________. Yet the power industry is probably not even halfway there in its shift from regulation to the marketplace. The California power crisis and the power-trading scandals sent regulators back to the drawing board, slowing the development of new institutions, rules and investment to make competitive markets work. (45) __________. [A] Over all, for more than a decade, the power industry has been struggling with how to move from the old regulation to the new marketplace. This shift was driven by the view that half a century of state regulation had produced power prices that were too high and too varied among states. Factories and jobs were migrating from states with high electric power prices to those with lower prices. [B] But the transmission system is caught in the middle of the stalled deregulation of the American electric power industry. [C] As a result, the development of the regional transmission organizations is erratic. More than one-third of the power transmitted is not under the control of regional transmission organizations. Some states fear that their cheap power would be sucked away to other markets; others do not want to subordinate state authority to the Federal Energy Regulatory Commission. [D] It was unclear when the waters would recede, never mind when life would return to normal. Power may not be restored for weeks. Looting, too. Began to spiral out of control. Mr Nagin, who said the city might be uninhabitable for three months, was forced to order police to concentrate on stopping crime, not saving people. [E] What's preventing greater connection and coordination between regions? The technology exists, and is available; the economic benefits of relieving the bottlenecks between regions far exceeds the costs by many billions of dollars. [F] Yet, despite claims in the wake of last week's blackout that the nation has a "third world" power grid, the regional networks are first world. But in one critical aspect, the system has become increasingly vulnerable: in the interconnections among the different regions. Both the number and size of the wires on the borders between regions are inadequate for the rising flow of electricity. This missing part creates the worst bottlenecks in the system. [G] Since entering the overseas power market in 1993, KEPCO has established several achievements through its distinguished international business strategies to promote electric power development of the world. Based on its long experience and advanced technology gained over 100 years in Korea, KEPCO continues to build up its outstanding reputation as a leading utility company. Moreover, KEPCO embraces challenges and makes bold steps into wider markets in the world by its flair for dynamic activities, which is favorably received in the Philippines, China, Vietnam and Libya.

填空题{{B}}Directions:{{/B}}In the following text, some sentences have been removed. For Questions 41-45, choose the most suitable one from the list A-G to fit into each of the numbered blanks. There are two extra choices, which do not fit in any of the blanks. Mark your answers on ANSWER SHEET 1. "Every three months from the beginning of 2008," says Cliff Richard, who was once Britain's answer to Elvis Presley, "I will lose a song." The reason is that in most European countries copyright protection on sound recordings lasts for 50 years, and (now) Sir Cliff recorded his first hit single, "Move It", in 1958. (41)______ One of the big four music firms estimates that about 100m "deep catalogue" (ie, old) albums now sold in Europe each year will have entered the public domain by the end of 2010. Assuming a current wholesale price of $10, that could jeopardise $1 billion of revenues, or about 3% of annual recorded music sales. (42)______ Even once much of the back catalogue has entered the public domain, the big music firms can carry on selling it on CD. They will even benefit from not having to pay anything to the artist or to his estate. They will in many cases still own copyright on the original cover art. But they will face new competition from a host of providers of CDs who may undercut them. And on the internet, public domain music is likely to be free, as much of the copy righted stuff already is on peer-to-peer networks. (43) ______ Artists have rallied to the cause: U2, Status Quo and Charles Aznavour all want the 50-year limit increased. Many more acts will sign a petition this spring. Sir Cliff has spent hours complaining to the commission that composers of songs get copyright for 70 years after their death: more than performers. (44)______ Many people believe that America has gone too far in protecting copyright at the expense of the public good, including, it seems, the commission, which said last year that it saw no need to lift its own 50-year limit. Its deadline for proposals on copyright law has supped from this year to 2006. But governments are likely to weigh in on the issue. France, Italy and Portugal have indicated that they support an extension of the term, and Britain is likely to stick up for its own music major, EMI. Although artists and their estates want longer copyright, the big music firms would benefit from it the most, especially 'in the next couple of decades, says Stephen King, chairman of the Association of United Recording Artists and manager of the Libertines: (45)______. Now they have wised up about making deals. The best guarantee of financial security—safer than clinging on to copyright—is hiring a good lawyer early on. [A] He is unlikely to produce such a big hit in the near future, so more of his attention is directed to revising the old song and selling it to more people. [B] Back in the 1950s, he says, performers got only one-tenth of the share of royalties that they do now. For years, artists have, with good reason, accused big record labels of ripping them off. [C] This month, early recordings by Elvis himself started to enter Europe' s public domain. Over the next few decades a torrent of the most popular tracks from the Beatles, the Rolling Stones and many other artists. will become public property in Europe—to the pleasure of fans and the consternation of the music industry. [D] The music industry also points out that America gives artists almost twice as much copyright protection as Europe. America has repeatedly lengthened copyright terms, with the latest reprieve, the Sonny Bono Copyright Term Extension Act of 1998, giving performers protection for 95 years after publication. [E] But when the attention is shifted from Europe to America, artists should feel much better because the length of copyright protection there is even shorter. It seems that the American government is more interested in serving the public than the already very rich artists. [F] Music executives want the European Commission to protect them from such unwelcome competition by extending the copyright term. [G] And that estimate accounts only for songs up to the end of the 1950s. Far more will be at risk as music from the 1960s and 1970s moves out of copyright.

填空题It's not just an American phenomenon: Across the globe, single-parent homes are on the rise. Numbers for one-parent families increased from England to Australia during the 1990s, mirroring demographic shifts reflected in the U.S. census. Just as in America, those shifts raised new questions about how involved government should be in helping single-parent families, which often are less well-off financially than those led by a married mom and dad. 41. __________ Annie Oliver, a 32-year-old single mother from Bristol, England, thinks so. "You wouldn't believe how becoming a single parent suddenly made me a second-class citizen," said Oliver, who struggles to keep a full-time job and give the extra care her disabled son needs. 42. __________ By comparison, 9.8 million house-holds, or 9 percent of all U. S. households were headed by an adult raising a child alone or without a spouse. The 1990 census showed 26 percent of homes were led by a married mother and father, and 8 percent of homes were led by a single parent. Similar increases occurred in other countries, though data from those countries are not directlycomparable to U.S. census figures because of methodology differences. 43. __________ Single parent households in Australia rose from 5.8 percent in 1990 to 7.6 percent in 1999. Other countries that saw large increases, according to the Organization: —Belgium, 1.8 percent of households in 1990 to 2.7 percent in 1999; —Ireland, 1.8 percent to 2.8 percent; —Luxembourg, 1.3 percent to 2.2 percent. 44. __________ Those countries tend to have greater acceptance of single parenting because there are fewer nearby family members to disapprove, Riche said. Lone-parent family households in Japan increased from 5.1 percent in 1990 to just 5.2 percent in 1999. 45. __________ "The position of one-parent families in any given country is very much a gender issue—women's opportunities, especially working-class women on low income," said Sue Cohen, coordinator of the Single Action Parents Network in England.[A] In the United States, the 2000 census showed 24.8 million, or nearly 24 percent of the nation's 105.5 million house-holds, were traditional two-parent homes.[B] Should single parents be afforded tax breaks to help pay for child care? Should employers be monitored to make sure flexible work-hours are offered?[C] Countries with increases in single-parent homes are often those where the nuclear family structure—just Mom, Dad and the kids—is more common than an extended, multigenerational family living under one roof, said demographer Martha Farnsworth Riche, a former Census Bureau director.[D] In the United Kingdom, lone-parent family homes increased from 3.3 percent of all households in 1990 to 5.5 percent in 1999, according to data compiled by the Paris-based Organization for Economic Cooperation and Development. It did not specify whether children in those homes were younger than 18.[E] Some research suggests children raised in two-parent families are better off than those who rely on one.[F] Rates were relatively unchanged during the same period in Greece, Italy and Portugal. These countries tend to think more conservatively about family makeup, and there is more pressure to avoid divorce or unmarried parenthood, Riche said.[G] "Most of the research linking single-parenthood to children's school performance has been done with single nations," .says Dr. Suet-ling Pong, associate professor of education and sociology and demography. "We do not know much about the impact of single parenthood across cultures and countries."

填空题English has become the world's number one language in the 20th century. In every country where English is not the native language, especially in the Third World, people must strive to learn it to the best of their abilities, if they want to participate fully in the development of their countries. (1) . (2) . Nonetheless, a world full of different languages will disappear if the present trend in many countries to use English to replace the national or official languages in education, trade and even politics continues. (3) . The Third World countries that are now using English as a medium of instruction are depriving 75 percent of their future leaders of a proper education. According to many studies, only around 20 to 25 percent of students in these countries can manage to learn the language of instruction (English) as well as basic subjects at the same time. Many leaders of these Third World countries are obsessed with English and for them English is everything. They seem to believe that if the students speak English, they are already knowledgeable. (4) . All the greatest countries of the world are great because they constantly use their own languages in all national development activities, including education. From a psychological point of view, those who are taught in their own language from the start will develop better self -confidence and self-reliance. From a linguistic point of view, the best brains can only be produced if students are educated in their own language from the start. (5) . There is nothing wrong, however, in learning a foreign language at advanced levels of education. But the best thing to do is to have a good education in one's native language first, then go abroad to have a university education in a foreign language. A. If this situation continues, the native or official languages of these countries will certainly die within two or three generations. This phenomenon has been called linguistic genocide. A language dies if it is not fully used in most activities, particularly as a medium of instruction in schools. B. Those who are taught in a foreign language from the start will tend to be imitators and lack self-confidence. They will tend to rely on foreign consultants. C. Suppose you work in a big firm and find English very important for your job because you often deal with foreign businessmen. Now you are looking for a place where you can improve your English, especially your spoken English. D. But many people are concerned that English's dominance will destroy native languages. E. These leaders speak and write English much better than their national languages. If these leaders deliver speeches anywhere in the world, they use English and they feel more at home with it and proud of their ability as well. The citizens of their countries do not understand their leaders' speeches because they are made in a foreign language. F. Here are some advertisements about English language training from newspapers. You may find the information you need. G. A close examination reveals a great number of Languages have fallen casualty to English. For example, it has wiped out Hawaiian, Welsh, Scotch, Gaelic, Irish, native American languages, and many others. Luckily, some of these languages are now being revived, such as Hawaiian and Welsh, and these languages will live again, hopefully, if dedicated people continue their work of reviving them.

填空题A. Perhaps our most dangerous bias is that we naturally assume that everyone else is more susceptible to thinking errors, a tendency known as the "bias blind spot." This "meta-bias" is rooted in our ability to spot systematic mistakes in the decisions of others—we excel at noticing the flaws of friends—and inability to spot those same mistakes in ourselves. In each instance, we readily forgive our own minds but look harshly upon the minds of other people. B. When people face an uncertain situation, they don"t carefully evaluate the information or look up relevant statistics. Instead, their decisions depend on a long list of mental shortcuts, which often lead them to make foolish decisions. These shortcuts aren"t a faster way of doing the math; they"re a way of skipping the math altogether. Asked about the bat and the ball, we forget our arithmetic lessons and instead default to the answer that requires the least mental effort. C. What explains this result? One provocative hypothesis is that the bias blind spot arises because of a mismatch between how we evaluate others and how we evaluate ourselves. When considering the irrational choices of a stranger, for instance, we are forced to rely on behavioral information; we see their biases from the outside, which allows us to glimpse their systematic thinking errors. However, when assessing our own bad choices, we tend to engage in elaborate introspection. We scrutinize our motivations and search for relevant reasons; we lament our mistakes to therapists and ruminate on the beliefs that led us astray. D. For more than five decades, Daniel Kahneman, a Nobel Laureate and professor of psychology at Princeton, has been asking questions like this and analyzing our answers. His disarmingly simple experiments have profoundly changed the way we think about thinking. While philosophers, economists, and social scientists had assumed for centuries that human beings are rational agents, Kahneman demonstrated that we"re not nearly as rational as we like to believe. E. Here"s a simple arithmetic question: A bat and ball cost a dollar and ten cents. The bat costs a dollar more than the ball. How much does the ball cost? The vast majority of people respond quickly and confidently, insisting the ball costs ten cents. This answer is both obvious and wrong. (The correct answer is five cents for the ball and a dollar and five cents for the bat.) F. The problem with this introspective approach is that the driving forces behind biases—the root causes of our irrationality—are largely unconscious, which means they remain invisible to self-analysis and impermeable to intelligence. In fact, introspection can actually compound the error, blinding us to those primal processes responsible for many of our everyday failings. We spin eloquent stories, but these stories miss the point. The more we attempt to know ourselves, the less we actually understand. G. In many instances, smarter people are more vulnerable to these thinking errors. Although we assume that intelligence is a buffer against bias—that"s why those with higher S. A. T. scores think they are less prone to these universal thinking mistakes—it can actually be a subtle curse. Order: 1 →D→ 2 → 3 → 4 →C→ 5

填空题 [A] What route does HIV take after it enters the body to destroy the immune system? [B] How and when did the long-standing belief concerning AIDS and HIV crop up? [C] What is the most effective anti-HIV therapy? [D] How does HIV subvert the immune system? [E] In the absence of a vaccine, how can HIV be stopped? [F] Why does AIDS predispose infected persons to certain types of cancer and infections? In the 20 years since the first cases of AIDS were detected, scientists say they have learned more about this viral disease than any other. Yet Peter Piot, who directs the United Nations AIDS program, and Stefano Vella of Rome, president of the International AIDS Society, and other experts say reviewing unanswered questions could prove useful as a measure of progress for AIDS and other diseases. Among the important broader scientific questions that remain: 41. __________. A long-standing belief is that cancer cells constantly develop and are held in check by a healthy immune system. But AIDS has challenged that belief. People with AIDS are much more prone to certain cancers like non-Hodgkins lymphomas and Kaposi's sarcoms, but not to breast, colon and lung, the most common cancers in the United States. This pattern suggests that an impaired immune system, at least the type that occurs in AIDS, does not allow common cancers to develop. 42. __________. When HIV is transmitted sexually, the virus must cross a tissue barrier to enter the body. How that happens is still unclear. The virus might invade directly or be carried by a series of different kinds of cells. Eventually HIV travels through lymph vessels to lymph nodes and the rest of the lymph system. But what is not known is how the virus proceeds to destroy the body's CD-4 cells that are needed to combat invading infectious agents. 43. __________. Although HIV kills the immune cells sent to kill the virus, there is widespread variation in the rate at which HIV infected people become ill with AIDS. So scientists ask. Can the elements of the immune system responsible for that variability be identified? If so, can they be used to stop progression to AIDS in infected individuals and possibly prevent infection in the first place? 44. __________. In theory, early treatment should offer the best chance of preserving immune function. But the new drugs do not completely eliminate HIV from the body so the medicines, which can have dangerous side effects, will have to be taken for a lifetime and perhaps changed to combat resistance. The new policy is expected to recommend that treatment be deferred until there are signs the immune system is weakening. Is a vaccine possible? There is little question that an effective vaccine is crucial to controlling the epidemic. Yet only one has reached the stage of full testing, and there is wide controversy over the degree of protection it will provide. HIV strains that are transmitted in various areas of the world differ genetically. It is not known whether a vaccine derived from one type of HIV will confer protection against other types. 45. __________. Without more incisive, focused behavioral research, prevention messages alone will not put an end to the global epidemic.

填空题{{B}}Directions:{{/B}}In the following text, some sentences have been removed. For Questions 41-45, choose the most suitable one from the list A-G to fit into each of the numbered blanks. There are two extra choices, which do not fit in any of the blanks. Mark your answers on ANSWER SHEET 1. Do mobile phones cause explosions at petrol stations? That question has just been exhaustively answered by Adam Burgess, a researcher at the University of Kent, in England. Oddly, however, Dr Burgess is not a physicist, but a sociologist. For the concern rests not on scientific evidence of any danger, but is instead the result of sociological factors: it is an urban myth, supported and propagated by official sources, but no less a myth for that. Dr Burgess presented his findings this week at the annual conference of the British Sociological Association. Mobile phones started to become widespread in the late 1980s, when the oil industry was in the middle of a concerted safety drive, Dr Burgess notes. This was, in large part, a response to the Piper Alpha disaster in 1988, when 167 people died in an explosion on an oil platform off the Scottish coast. 41.______So nobody questioned the precautionary ban on the use of mobile phones at petrol stations. The worry was that an electrical spark might ignite explosive fumes. 42.______But it was too late. The myth had taken hold. One problem, says Dr Burgess, is that the number of petrol-station fires increased in the late 1990s, just as mobile phones were proliferating. Richard Coates, BP's fire-safety adviser, investigated many of the 243 such fires that occurred around the world between 1993 and 2004. He concluded that most were indeed caused by sparks igniting petrol vapour, but the sparks themselves were the result of static electricity, not electrical equipment. Most drivers will have experienced a mild electric shock when climbing out of their vehicles. It is caused by friction between driver and seat, with the result that both end up electrically charged. When the driver touches the metal frame of the vehicle, the result is sometimes a spark. 43.______ 44. ______ One e-mail contained fictitious examples of such explosions said to have happened in Indonesia and Australia. Another, supposedly sent out by Shell, found its way on to an internal website at Exxon, says Dr Burgess, where it was treated as authoritative by employees. Such memos generally explain static fires quite accurately, but mistakenly attribute them to mobile phones. Official denials, says Dr Burgess, simply inflame the suspicions of conspiracy theorists. 45. ______ Warning signs. abound in Britain, America, Canada and Australia. The city of Sao Paulo, in Brazil, iatroduced a ban last year, And, earner tins month, a member of Connecticut's. senate proposed making the use of mobile phones in petrol stations in that state punishable by a $ 250 fine. [A] The safety drive did not apply merely to offshore operations: employees at some British oil-company offices are now required to use handrails while walking up and downstairs, for example. [B] As a result, the company had to pay a huge amount of compensation to the families of the victims and law suits concerning those fires seemed to be endless. [C] A further complication was the rise of the internet, where hoax memos, many claiming to originate from oil companies, warned of the danger of using mobile phones in petrol stations. [D] This is particularly noticeable in Britain. The country that led the way in banning mobile phones at petrol stations is also the country that has taken the strongest line on the safety of mobile-phone use by children. [E] Despite the lack of evidence that mobile phones can cause explosions, bans remain in place around the world, though the rules vary widely. [F] By the late 1990s, however, phone makers--having conducted their own research— realized that there was no danger of phones causing explosions since they could not generate the required sparks. [G] This seems to have become more common as plastic car interiors, synthetic garments and rubber-soled shoes have proliferated.

填空题 A. The consequence of losing bones B. A better lab in space than on earth C. Two different cases D. Multiple effects form weightlessness E. How to overcome weightlessness F. Factors that are not so sure During weightlessness, the forces within the body undergo dramatic change. Because the spine is no longer compressed, people grow taller. The lungs, heart and other organs within the chest have no weight, and as a result, the rib cage and chest relax and expand. Similarly, the weights of the liver, kidneys, stomach and bowels disappear. One astronaut said after his flight: "You feel your guts floating up. I found myself tightening my belly, sort of pushing things back." 41.______ Meanwhile muscles and bones come to be used in different ways. Our muscles are designed to support us when stand or sit uptight an4 to move body parts. But in space, muscles used for support on the ground are no longer needed for that purpose; moreover, the muscles used for movement around a capsule differ from those used for walking down a hall. Consequently, some muscles rapidly weaken. This doesn't present a problem to space travelers as long as they perform only light work. But preventing the loss of muscle tissue required for heavy work during space walks and preserving muscle for safe return to Earth are the subject of many current experiments. Studies have shown that astronauts lose bone mass from the lower spine, hips and upper leg at a rate of about 1 percent per month for the entire duration of their time in space. Some sites, such as the heel, lose calcium faster than others. Studies of animals taken into space suggest that bone formation also declines. 42.______ Needless to say, these data are indeed cause for concern. During space flight, the loss of bone elevates calcium levels in the body, potentially causing kidney stones and calcium crystals to form in other tissues. Back on the ground, the loss of bone calcium stops within one month, but scientists do not yet know whether the bone recovers completely: too few people have flown in space for long periods. Some bone loss may be permanent, in which case ex-astronauts will always be more prone to broken bones. 43.______ These questions mirror those in our understanding of how the body works here on Earth. For example, elderly women are prone to a loss of bone mass. Scientists understand that many different factors can be involved in this loss, but they do not yet know how the factors act and interact; this makes it difficult to develop an appropriate treatment. So it is with bone loss in space, where the right prescription still awaits discovery. Many other body systems are affected directly and indirectly. One example is the lung. Scientists have studied the lung in space and learned much they could not have learned in laboratories on earth. On the ground the top and bottom parts of the lung have different patterns of air flow and blood flow. But are these patterns the result only of gravity, or also of the nature of the lung itself? Only recently have studies in space provided clear evidence for the latter. Even in the absence of gravity, different parts of the lung have different levels of air flow and blood flow. 45.______ Not everything that affects the body during space flight is related solely to weightlessness. Also affected, for example, are the immune system and the multiple systems responsible for the amount and quality of sleep (light levels and work schedules disrupt the body's normal rhythms). Looking out the spacecraft window just before going to sleep (an action difficult to resist, considering the view) can let enough bright light into the eye to trigger just the wrong brain response, leading to poor sleep. As time goes on, the sleep debt accumulates. For long space voyages, travelers must also face being confined in a tight volume, unable to escape, isolated from the normal life of Earth, living with a small, fixed group of companions who often come from different cultures. These challenges can lead to anxiety, depression, crew tension and other social issues, which affect astronauts just as much as weightlessness-perhaps even more. Because these factors operate at the same time the body is adapting to other environmental changes, it may not be clear which physiological changes result from which factors. Much work remains to be done.

填空题Directions: In the following article, some sentences have been removed. For Questions 41-45, choose the most suitable one from the list A-G to fit into each of the numbered blanks. There are two extra choices, which do not fit in any of the blanks. Scholars, writers and teachers in the modern academic community have strong feelings about acknowledging the use of another person's ideas. In the English-speaking world, the term plagiarism is used to label the practice of not giving credit for the source of one's ideas. 41．______ 42．______In many universities, the punishment may range from failure in a particular course to expulsion from the university. In the literary world, where writers are protected from plagiarism by international copyright laws, the penalty may range from a small fine to imprisonment and a ruined career. Protection of scholars and writers, through the copyright laws and through the social pressures of the academic and literary communities, is a relatively recent concept. Such social pressures and copyright laws require writers to give scrupulous attention to documentation of their sources. Students, as inexperienced scholars themselves, must avoid various types of plagiarism by being self-critical in their use of other scholars' ideas and by giving appropriate credit for the source of borrowed ideas and words, otherwise dire consequences may occur. 43．______ Plagiarism by accident, or oversight, sometimes is the result of the writer's inability to decide or remember where the idea came from. He may have read it long ago, heard it in a lecture since forgotten, or acquired it second-hand or third-hand from discussions with colleagues. He may also have difficulty in deciding whether the idea is such common knowledge that no reference to the original source is needed. Although this type of plagiarism must be guarded against, it is the least serious and, if lessons learned, can be exempt from being severely punished. Plagiarism through ignorance is simply a way of saying that inexperienced writers often do not know how or when to acknowledge their sources. The techniques for documentation-note- taking, quoting, footnoting, listing bibliography-are easily learned and can prevent the writer from making unknowing mistakes or omissions in his references. 44．______ The most serious kind of academic thievery is plagiarism by intention. The writer, limited by his laziness and dullness, copies the thoughts and language of others and claims them for his own. He not only steals, he tries to deceive the reader into believing the ideas are original. Such words as immoral, dishonest, offensive, and despicable are used to describe the practice of plagiarism by intention. The opposite of plagiarism is acknowledgement. 45．______Students, as developing scholars, writers, teachers, and professional leaders, should recognize and assume their responsibility to document all sources from which language and thoughts are borrowed. Other members of the profession will not only respect the scholarship, they will admire the humility and honesty. [A] The penalties for plagiarism vary from situation to situation. [B] Many scholars suggest rigid self-regulations in academic world in order to protect the purity of academics. [C] "Penalty for plagiarism should be regulated by laws and regulations," said one scholar, "it is no better than theft. " [D] Although there is no copyright in news, or in ideas, only in the expression of them, the writer cannot plead ignorance when his sources for ideas are challenged. [E] Simply stated, plagiarism is "the wrongful appropriation or purloining, and publication as one's own of the ideas, or the expression of ideas of another. " [F] All mature and trustworthy writers make use of the ideas of others but they are careful to acknowledge their indebtedness to their sources. [G] There are at least three classifications of plagiarism as it is revealed in students' inexactness in identifying sources properly. They are plagiarism by accident, by ignorance, and by intention.

填空题Smoking, inhalation and exhalation of the fumes of burning tobacco. Leaves of the tobacco plant are smoked in various ways. After a drying and curing process, they may be rolled into cigars or shredded for insertion into smoking pipes. Cigarettes, the most popular method of smoking, consist of finely shredded tobacco rolled in lightweight paper. About 50 million people in the United States currently smoke an estimated total of 570 billion cigarettes each year. But, is smoking a good habit? 1 Increased risk of cancer Some experts noticed that lung cancer, which was rare before the 20th century, had increased dramatically since about 1930. The American Cancer Society and other organizations initiated studies comparing deaths among smokers and nonsmokers over a period of several years. 2 More deaths from other diseases Smokers also run greater risk of dying from diseases apart from cancers. 3 Cigar and pipe smoke, as dangerous Cigar and pipe smoke contains the same toxic and carcinogenic compounds found in cigarette smoke. 4 The effect of environmental tobacco smoke Recent research has focused on the effects of environmental tobacco smoke (ETS), that is, the effect of tobacco smoke on nonsmokers who must share the same environment with a smoker. 5 Addiction at an early age The smoking habit and addiction to nicotine usually begins at an early age. This has led to particular concern over smoking in teenagers and young adults. There is no need to kill innocent human beings. Restricting tobacco use may be the only answer to a healthy world. Tobacco is harmful not only to us, but to the people in surrounding areas. Tobacco use has been passed on from generation to generation. It is now time to put a ban on smoking. With the help of thousands of people, smoking can be controlled. Now it is the time to start a tobacco battle. Smoking needs to become extinct worldwide. A. A report by the National Cancer Institute concluded that the mortality rates from cancer of the mouth, throat, larynx, pharynx, and esophagus are approximately equal in users of cigarettes, cigars, and pipes. Rates of coronary heart disease, lung cancer, emphysema, and chronic bronchitis are elevated for cigar and pipe smokers and are correlated to the amount of smoking and the degree of inhalation. B. In the United States, more than 70 percent of adults who smoke began smoking before the age of 18. From the early to mid-1990s the proportion of teenage smokers in the United States rose from one-quarter to onethird, despite increasing warnings about the health hazards of smoking and widespread bans on smoking in public places. In 2001 surveys of students in grades 9 through 12 found that more than 38 percent of male students and nearly 30 percent of female students smoke. Although black teenagers have the lowest smoking rates of any racial group, cigarette smoking among black teens increased 80 percent in the late 1990s. C. It is estimated that cigarettes are responsible for about 431,000 deaths in the United States each year. Lung cancer accounts for about 30 percent of all cancer deaths in the United States, and smoking accounts for nearly 90 percent of lung cancer deaths. The risks of dying from lung cancer are 23 times higher for male smokers and 13 times higher for female smokers than nonsmokers. Additionally, smokers are at increased risk for cancer of the larynx, oral cavity, esophagus, bladder, kidney, and pancreas. D. Research has shown that mothers who smoke give birth more frequently to premature or underweight babies, probably because of a decrease in blood flow to the placenta. E. The United States Environmental Protection Agency (EPA) estimates that exposure to the environment that contains all the toxic agents exhaled by a smoker, causes 3,000 cancer deaths and an estimated 40,000 deaths from heart disease per year in nonsmokers. Secondhand smoke can aggravate asthma, pneumonia, bronchitis, and impaired blood circulation. F. Smoking causes a fivefold increase in the risk of dying from chronic bronchitis and emphysema, and a twofold increase in deaths from diseases of the heart and coronary arteries. Smoking also increases the risk of stroke by 50 percent—40 percent among men and 60 percent among women.

填空题A sticking plaster may appear to be a grossly inadequate treatment for a paraplegic. Attach a few electrodes, though, and a device that resembles such a dressing could help translate into actions the thoughts of people who are paralysed. In 2008 a practical version will be shown to work and the first individuals will be recruited to try them for real. Paralysis is a breakdown in communication. The brain does not t0rget how to ride a bicycle. 41. ____________________________________. John Donoghue of Brown University in Rhode Island has been working on how to restore that link. He has shown that the technology he has developed works, albeit only for a handful of people who were prepared to endure having a tangle of wires dangling from their heads. In 2008 Mr. Donoghue and his colleagues will turn their device into something that looks like a hearing aid and whose use could become almost as routine. 42. ______________________________. When the nerve cell fires, this electrical activity will be picked up by the wire and conveyed to the silicon chip. 43. ____________________________________. Power will come via an inductive coil placed under the scalp and next to another on top of the scalp, which will be attached to a battery. This, and a computing unit worn on a belt, will be the only parts visible outside the body. Ultimately the team intends to implant the computer unit in the chest, connected to the brain by a fibre-optic cable. The researchers reckon their device will be able to direct a motorised wheelchair or move a robotic hand. But they also want to restore to paraplegics the use of their own bodies. 44. ______________________________. Connecting the two systems together would mimic the way in which the body normally works. But restoring useful movement to paraplegics involves more than making muscles work once more. It also means restoring a capability that most able-bodied people do not realise they have: the use of sensory feedback to fine-tune actions. 45. __________________________________________. In order to achieve this, in 2008 Mr. Donoghue and his colleagues will develop their system to run in reverse. Because the monkeys used in the tests will not be paralysed, the implant will not only broadcast what the brain is doing but also eavesdrop on what happens to the nerve cells when they are receiving information. This could then be mimicked in people. The idea is that paralysed people could operate, say, a robotic hand with sensors that collect information about the pressure and temperature they encounter and convey these data back to the brain. That is, the human brain will be stimulated to feel what the robot senses. Not bad for a device that looks like a sticking plaster.[A] The researchers will implant a silicon chip the size of a small button into the brains of monkeys. The chip will be fitted with an array of 100 thread-like gold wires, each of which will be attached to a nerve cell in the brain.[B] Hence their involvement with Hunter Peckham of Case Western Reserve University. He is developing a system which electrically stimulates muscles to make them move once again.[C] Years after paralysis has struck, the same nerve cells fire when someone is thinking about moving ; it is just that the rest of the body does not receive the message.[D] There are many kinds of sticking plasters, which are now in wide use in many countries. But sticking plasters are not very adequate to treat paraplegics and paralytics.[E] Reach out to pick up a cup of hot tea from a vending machine and, as your hand touches the cup, it subtly adjusts its grip so that enough strength is used to lift the cup without crushing it and burning your fingers.[F] The next step will be to transmit this information from the skull to the outside world. A second device will be attached to the silicon chip to do this. It will transmit data through the skin using pulses of infra-red light, just like a remote control.[G] A robotic hand is equipped with sensors, which are mainly used to collect related information and transmit it to the outside chip. Then this chip will process the message and inform the paraplegic to move his or her muscles.