单选题Twins do not always display a noticeable {{U}}likeness{{/U}}.

单选题Her {{U}}specialty{{/U}} is heart surgery.

单选题About one quarter of the workers in the country are employed in factories.

单选题The best olive oil is obtained from olives that are {{U}}harvested{{/U}} just after they ripen and before they turn black.

单选题We have never seen such {{U}}gorgeous {{/U}} hills.

单选题I don't know what makes Christina so {{U}}attractive{{/U}} to young men.

单选题{{B}}第三篇{{/B}} {{B}} Changes in the American Family{{/B}} How much change has really occurred in the American family and what are the implications of these changes? First, the household size has changed greatly since 1790. From 1790 to 1978 the mean family size was cut in half from 5.79 persons to 2.81 persons. In 1790 almost 63 percent of all persons lived in the households of five or more people. By 1978 the size accounted for a little over 14 percent of all households. By the end of the 19th century a majority of Americans were living in urban areas, and the family was very much influenced By the rapid development of industrialization. With the arrival of immigrants, the urban population was increasingly heterogeneous(由不同成分组成的). This challenges the exclusiveness of any single family pattern. In the 20th century, the ideal American family consisted of a husband and wife living with dependent children. They lived in a household of their own provided for by the husband's earnings. The wife was responsible for emotional maintenance of the marriage and for raising the children and running the household. The major change in the family in this century has been due to married women entering the work force. This, at least for periods of time, has taken the woman out of her full-time involvement in the home. Of all husband and wife families about 40% have both in the work force at any given time. In the past the identity of the individual was submerged in the family. In general, reputation in the community came from the family. Today, however, whatever individuals achieve is usually assessed on its own merit, and family has little relevance. Individuals make it or don't make it essentially on their own. A sociologist describes another way in which the American family has changed. Today, in the Western world, the major burdens that are a part of the family system are emotional ones. But in the 19th century the family was much more involved with economic needs and tasks; family and relatives were valued for providing assistance during crisis.

单选题第二篇 Can Buildings Be Designed to Resist Terrorist Attack In the aftermath of the terrorist attack on the World Trade Center, structural engineers are trying hard to solve a question that a month ago would have been completely unthinkable: Can building be designed to withstand catastrophic blasts inflicted by terrorists? Ten days after the terrorist attacks on the twin towers, structural engineers from the University at Buffalo and the Multidisciplinary Center for Earthquake Engineering Research (MCEER) headquartered at UB traveled to ground zero as part of a project funded by the National Science Foundation. Visiting the site as part of an MCEER reconnaissance visit, they spent two days beginning the task of formulating ideas about how to design such structures and searching for clues on how to do so in buildings that were damaged, but still are standing. "Our objective in visiting ground zero was to go and look at the buildings surrounding the World Trade Center, those buildings that are still standing, but that sustained damage," said M. Bruneau, Ph.D. "Our immediate hope is that we can develop a better understanding as to why those buildings remain standing, while our long-term goal is to see whether earthquake engineering technologies can be married to existing technologies to achieve enhanced performance of buildings in the event of terrorist attacks." he added. Photographs taken by the investigators demonstrate in startling detail the monumental damage inflicted on the World Trade Center towers and buildings in the vicinity. One building a block away from the towers remains standing, but was badly damaged. "This building is many meters away from the World Trade Center and yet we see a column there that used to be part of that building", explained A. Whittaker, Ph. D. "The column became a missile that shot across the road, through the window and through the floor." The visit to the area also revealed some surprises, according to the engineers. For example, the floor framing systems in one of the adjacent buildings was quite rugged, allowing floors that were pierced by tons of falling debris to remain intact. "Highly redundant ductile framing systems may provide a simple, but robust strategy for blast resistance." he added. Other strategies may include providing alternate paths for gravity loads in the event that a load-bearing column fails. "We also need a better understanding of the mechanism of collapse", said A. Whittaker. "We need to find out what causes a building to collapse and bow you can predict it." A. Reinhorn, Ph.D. noted that "earthquake shaking has led to the collapse of many buildings in the past. It induces dynamic response and extremely high stresses and deformations in structural components. Solutions developed for earthquake-resistant design may be directly applicable to blast engineering and terrorist-resistant design. Part of our mission now at UB is to transfer these solutions and to develop new ones where none exist at present."

单选题It"s prudent to start any exercise program gradually at first.

单选题Sports Star Yao Ming If Yao Ming is not the biggest sports star in the world, he is almost certainly the tallest. At 2.26m, he is the tallest player in the National Basketball Association (NBA) and holds the record as the most towering Olympian ever to compete in the Games. But what really stands out about the giant center is his celebrity (名气). Few, if any, Chinese athletes are as well-known as Yao around the world. People across the globe are fascinated with Yao, not only for his basketball prowess (杰出的才能) but also for being a symbol of international commerce. When Yao joined the Houston Rockets as the No. 1 pick in the 2002 NBA draft (选拔), he was the first international player ever to be selected first. His assets on the court are clear enough—no NBA player of his size has ever possessed his mobility, so he is a handful (难对付的人) for opponents on either end of the court. But what makes Yao invaluable to the Rockets organization is his role as a global citizen and as a bridge to millions of potential basketball fans in China. When it was announced in February that Yao would miss the rest of the NBA season and possibly the Olympics with a stress fracture (骨折) in his left foot, a collective shudder (震动) spread across China. After considerable debate and discussion, Yao opted to get his foot surgically treated in an operation that placed several tiny screws across the bone, to offer his overburdened foot more support. The surgery was a success, and though the estimated four-month recovery period will leave him little time to prepare with Team China, Yao has vowed to be ready for the Beijing Olympics. Yao wrapped up a 10-day trip to China, where he underwent a series of traditional Chinese medicine (TCM) treatments, hoping to accelerate his recovery process. Western experts are generally skeptical of TCM"s benefits, although new research from the University of Rochester suggests that a certain compound derived from shellfish may indeed stimulate bone repair. "There is no reason to dismiss TCM," Yao told a press conference in Beijing. "It"s been used in our country for thousands of years. I don"t think that it"s short on science."

单选题Her life is becoming more diverse .

单选题{{B}}第二篇{{/B}} {{B}}Why They Travel?{{/B}} Scholars and students have always been great travellers. The official case for “academic mobility” is now often stated in impressive terms as a fundamental necessity for economic and social progress in the world, and debated in the corridors of Europe, but it is certainly nothing new. Serious students were always ready to go abroad in search of the most stimulating teachers and the most famous academies; in search of the purest philosophy, the most effective medicine, the likeliest road to gold. Mobility of this kind meant also mobility of ideas, their transference across frontiers, their simultaneous impact upon many groups of people. The point of learning is to share it, whether with students or with colleagues; one presumes that only eccentrics have no interest in being credited with a startling discovery, or a new technique. It must also have been reassuring to know that other people in other parts of the world were about to make the same discovery or were thinking along the same lines, and that one was not quite alone, confronted by inquisition, ridicule or neglect. In the twentieth century, and particularly in the last 20 years, the old footpaths of the wandering scholars have become vast highways. The vehicle which has made this possible has of course been the aeroplane, making contact between scholars even in the most distant places immediately feasible, and providing for the very rapid transmission of knowledge. Apart from the vehicle itself, it is fairly easy to identify the main factors which have brought about the recent explosion in academic movement. Some of these are purely quantitative and require no further mention: there are far more centres of learning, and a far greater number of scholars and students. In addition one must recognise the very considerable multiplication of disciplines, particularly in the sciences, which by widening the total area of advanced studies has produced an enormous number of specialists whose particular interests are precisely defined. These people would work in some isolation if they were not able to keep in touch with similar isolated groups in other countries. Frequently these specialisations lie in areas where very rapid developments are taking place, and also where the research needed for developments is extremely costly and takes a long time. It is precisely in these areas that the advantages of collaboration and sharing of expertise appear most evident. Associated with this is the growth of specialist periodicals, which enable scholars to become aware of what is happening in different centres of research and to meet each other in conferences and symposia. From these meetings come the personal relationships which are at the bottom of almost all formalized schemes of cooperation, and provide them with their most satisfactory stimulus. But as the specialisations have increased in number and narrowed in range, there had been an opposite movement towards interdisciplinary studies. These owe much to the belief that one cannot properly investigate the incredibly complex problems thrown up by the modern world, and by recent advances in our knowledge along the narrow front of a single discipline. This trend has led to a great deal of academic contact between disciplines, and a far greater emphasis on the pooling of specialist knowledge, reflected in the broad subjects chosen in many international conferences.

单选题Jack eventually overtook the last truck.

单选题She was unwilling to go but she had no choice.

单选题The last paragraph tells us, among other things, that

单选题A fossil is a {{U}}remnant{{/U}} of a once-living organism.

单选题Making Light of Sleep All we have a clock located inside our brains. Similar to your bedside alarm clock, your internal clock runs on a 24-hour cycle. This cycle, called a circadian rhythm, helps control when you wake, when you eat and when you sleep. Somewhere around puberty, something happens in the timing of the biological clock. The clock pushes forward, so adolescents and teenagers are unable to fall asleep as early as they used to. When your mother tells you it's time for bed, your body may be pushing you to stay up for several hours more. And the light coming from your computer screen or TV could be pushing you to stay up even later. This shift is natural for teenagers. But staying up very late and sleeping late can get your body's clock out of sync with the cycle of light and dark. It can also make it hard to get out of bed in the morning and may bring other problems, too. Teenagers are put in a kind of a gray cloud when they don't get enough sleep, says Mary Carskadon, a sleep researcher at Brown University in Providence, RI. It affects their mood and their ability to think and learn. But just like your alarm clock, your internal clock can be reset. In fact, it automatically resets itself every day. How? By using the light it gets through your eyes. Scientists have known for a long time that the light of day and the dark of night play important roles in setting our internal clocks. For years, researchers thought that the signals that synchronize the body's clock were handled through the same pathways that we use to see. But recent discoveries show that the human eye has two separate light-sensing systems. One system allows us to see. The second system tells our body whether it's day or night.

单选题 Language Language is and should be a living thing, constantly enriched with new words and forms of expression. But there is a vital distinction between good developments, which add to the language, enabling us to say things we could not say before, and bad developments, which subtract from the language by rendering it less precise. A vivacious, colorful use of words is not to be confused with mere slovenliness (不修边幅). The kind of slovenliness in which some professionals deliberately indulge is perhaps akin (相似的) to the cult of the unfinished work, which has eroded most of the arts in our time. And the true answer to it is the same that art is enhanced, not hindered, by discipline. You cannot carve satisfactorily in butter. The corruption of written English has been accompanied by an even sharper decline in the standard of spoken English. We speak very much less well than was common among educated Englishmen generation or two ago. The modern theatre has played a baneful part in dimming our appreciation of language. Instead of the immensely articulate dialogue of, for example, Shaw (who was also very insistent off good pronunciation), audiences are now subjected to streams of barely literate trivia, often designed, only too well, to exhibit "lack of communication", and larded with the obscenities and grammatical errors of the intellectually impoverished. Emily Post once advised her readers: "The theatre is the best possible place to hear correctly-enunciated speech." Alas, no more. One young actress was recently reported to be taking lessons in how to speak badly, so that she should fit in better. But the BBC is the worst traitor. After years of very successfully helping to raise the general standard of spoken English, it suddenly went into reverse. As the head of the pronunciation unit coyly put it: "In the 1960s the BBC opened the field to a much wider range of speakers." To hear a BBC disc jockey talking to the latest ape-like pop idol is a truly shocking experience of verbal squalor. And the prospect seems to be of even worse to come. School teachers are actively encouraged to ignore little Johnnys incoherent grammar, atrocious spelling and haphazard punctuation, because worrying about such things might inhibit his creative genius.

单选题下面有3篇短文，每篇短文后有5道题，每题后面有4个选项。请仔细阅读短文并根据短文回答其后面的问题，从4个选项中选择1个最佳答案。{{B}}第一篇{{/B}} {{B}}Japanese Drilling into Core of Earth{{/B}} In what resembles a journey to the center of the Earth, Japanese scientists have launched the world's first attempt to bore a hole into the red-hot core of a volcano and unlock the secrets of deadly eruption. A 50-meter-high oil-rig-like derrick perched on the scrubby slopes of Japan's Mount Unzen will begin drilling through the volcano's crust next week in a bid to sample the magma bubbling below. The aim is to study how the liquefied rock causes menacing gas buildup, said team leader Setsuya Nakata, of the University of Tokyo's Earthquake Research Institute. "Gassing is important because it controls the explosivity of eruptions," Nakata said. "The results can be expanded to anti-disaster research." Mount Unzen, a wind-swept 1,486-meter dome on the southern island of Kyushu, is a perfect model. It erupted in 1991, showering avalanches of hot rocks over a nearby town, killing 43 people and leaving nearly 2,300 homeless. Another 11,000 people were evacuated from the area until 1995, when the volcano had stabilized. The results are particularly important to a nation like Japan, where the meteorological agency monitors 20 dangerous peaks. Perhaps Japan's most famous volcano is snowcapped Mount Fuji, which last erupted in 1707 and sprinkled Tokyo with ash. The drilling on Mount Unzen will begin very soon from an altitude of 850 meters on its northwest slope. Scientists hope to tap a magma vent around sea level by August and extract a 200- meter-long core sample by summer 2004. Boring into the glowing magma at that level would normally be impossible, because of its fiery 700 degree Celsius heat. Thus, a slurry of water will be pumped into the drill shaft to cool the magma and allow the drill head to cut through. Nakata said there is no danger of triggering another eruption.

单选题{{B}}第二篇{{/B}} {{B}}Common-cold Sense{{/B}} You can't beat it, but you don't have to join it. Maybe it got the name "common cold" because it's more common in winter. The fact is, though, being cold doesn't have anything to do with getting one. Colds are caused by the spread of rhinoviruses, and, at least so far, medical science is better at telling you how to avoid getting one than how to get rid of one. Children are the most common way cold viruses are spread to adults, because they have more colds than adults — an average of about eight per year. Why do kids seem so much more easily to get colds than their parents? Simple. They haven't had the oppommity to become immune to many cold viruses. There are more than 150 different cold viruses, and you never have the same One twice. Being infected by one makes you immune to it — but only it. Colds are usually spread by direct contact, not sneezing or coughing. From another person' s hand to your hand and then to your nose or eyes is the most common route. The highest concentration of cold viruses anywhere is found under the thumbnails of a boy, although the viruses can survive for hours on skin or other sm6oth surfaces. Hygiene is your best defense. Wash your hands frequently, preferably with a disinfectant soap, especially when children in your household have colds. But even careful hygiene won't ward off every cold. So, what works when a coughing,sneezing,runny nose strikes? The old prescription of two aspirins, lots of water, and bed rest is a good place to start. But you'll also find some of the folk remedies.., worth Wing. Hot mixtures of sugar (or honey), lemon, and water have real benefits. rhinovirus n. 鼻病毒 immune adj. 免疫的，有免疫力的 disinfectant n.消毒剂，杀菌剂 prescription n. (1)诀窍 (2)处方，药方 sneeze vi.打喷嚏 thumbnail n.拇指甲