单选题This table is strong and durable. A. long-lasting B. extensive C. far-reaching D. eternal

单选题Ambition is a characteristic of all successful businessmen.A. factorB. featureC. signD. symbol

单选题Find Yourself Packing It On? Blame Friends Obesity can spread from person to person, much like a virus, researchers are reporting today. When one person gains weight, close friends tend to gain weight, too. Their study, published in The New England Journal of Medicine , involved a detailed analysis of a large social network of 12,067 people who had been closely followed for 32 years, from 1971 to 2003. The investigators knew who was friends with whom as well as who was a spouse or sibling or neighbor, and they knew how much each person weighed at various times over three decades. That let them reconstruct what happened over the years as individuals became obese. Did their friends also become obese? Did family members? Or neighbors? The answer, the researchers report, was that people were most likely to become obese when a friend became obese. That increased a person"s chances of becoming obese by 57 percent. There was no effect when a neighbor gained or lost weight, however, and family members had less influence than friends. It did not even matter if the friend was hundreds of miles away, the influence remained. And the greatest influence of all was between close mutual friends. There, if one became obese, the other had a 17 percent increased chance of becoming obese, too. The same effect seemed to occur for weight loss, the investigators say. But since most people were gaining, not losing, over the 32 years, the result was, on average, that people grew fatter. Dr. Nicholas A. Christakis, a physician and professor of medical sociology at Harvard Medical School and a principal investigator in the new study, said one explanation was that friends affected each others" perception of fatness. When a close friend becomes obese, obesity may not look so bad. "You change your idea of what is an acceptable body type by looking at the people around you." Dr. Christakis said. The investigators say their findings can help explain why Americans have become fatter in recent years—each person who became obese was likely to drag along some friends. Their analysis was unique, Dr. Christakis said, because it moved beyond a simple analysis of one person and his or her social contacts and instead examined an entire social network at once, looking at how a person"s friend"s friends, or a spouse"s sibling"s friends, could have an influence on a person"s weight. The effects, he said, "highlight the importance of a spreading process, a kind of social contagion that spreads through the network." Of course, the investigators say, social networks are not the only factors that affect body weight. There is a strong genetic component at work, too. Science has shown that individuals have genetically determined ranges of weights, spanning perhaps 30 or so pounds for each person. But that leaves a large role for the environment in determining whether a person"s weight is near the top of his or her range or near the bottom. As people have gotten fatter, it appears that many are edging toward the top of their ranges. The question has been why. If the new research is correct, it may say that something in the environment seeded what some call an obesity epidemic, making a few people gain weight. Then social networks let the obesity spread rapidly.

单选题Ethnic Tensions in Belgium Belgium has given the world Audrey Hepburn, René Magritte (surrealist artist), the saxophone (萨克斯管) and deep-fried potato chips that are somehow called French. But the story behind this flat, twice-Beijing-size country is of a bad marriage between two nationalities living together that cannot stand each other. With no new government, more than a hundred days after a general election, rumors run wild that the country is about to disappear. "We are two different nations, an artificial state. With nothing in common except a king, chocolate and beer," said Filip Dewinter, the leader of the Flemish Bloc, the extreme-right Flemish party. Radical Flemish separatists like Mr Dewinter want to divide the country horizontally along ethnic and economic lines: to the north, Flanders—where Dutch (known locally as Flemish) is spoken and money is increasingly made; to the south, French-speaking Wallonia, where today old factories dominate the landscape. The area of present-day Belgium passed to the French in the 18th century. Following the defeat of Napoleon in 1815, Belgium was given to the kingdom of the Netherlands, from which it gained independence as a separate kingdom in 1830. Since then, it has struggled for cohesion (结合). Anyone who has spoken French in a Flemish city quickly gets a sense of the mutual hostility that is part of daily life there. But there are reasons Belgium is likely to stay together, at least in the short term. The economies of the two regions are tightly linked, and separation would be a financial nightmare. But there is also deep resentment in F1anders that its much healthier economy must subsidize (补贴) the south, where unemployment is double that of the north. French speakers in the south, meanwhile, favor the status quo (现状). Belgium has made it through previous threats of division. Although some political analysts believe this one is different, there is no panic just now. "We must not worry too much," said Baudouin Bruggeman, a 55-year-old school-teacher. "Belgium has survived on compromise since 1930. You have to remember that this is Magritte"s country, the country of surrealism. Anything can happen."

单选题By conducting experiments on brave volunteers, Walter Reed was able to identify the particularkind of mosquito that carried yellow fever.

单选题The company takes environmental issues into account wherever possible.______

单选题 What Makes a Soccer Player Great? Soccer is played by millions of people all over the world, but there have only been few players who were truly great. How did these players get that way—was it through training and practice, or are great players "born, not made"? First, these players came from places that have had famous stars in the past—players that a young boy can look up to and try to imitate (效仿). In the history of soccer, only six countries have ever won the World Cup—three from South America and three from Western Europe. There has never been a great national team—or a really great player from North America or from Asia. Second, these players have all had years of practice in' the game. Alfredo Di Stefano was the son of a soccer player, as was Pele. Most players begin playing the game at the age of three or four. Finally, many great players come from the same kind of neighbourhood (聚居区)—a poor, crowded area where a boy's dream is not to be a doctor, lawyer, or businessman, but to become a rich, famous athlete or entertainer. For example, Liverpool, which produced the Beatles (甲壳虫乐队.), had one of the best English soccer teams in recent years. Pele practiced in the street with a "ball" made of rags (破布). And George Best learned the tricks that made him famous by bouncing the ball off a wall in the slums (贫民窟) of Belfast. All great players have a lot in common, but that doesn't explain why they are great. Hundreds of boys played in those Brazilian streets, but only one became Pele. The greatest players are born with some unique quality that sets them apart from all the ethers.

单选题She showed a natural {{U}}aptitude{{/U}} tor the work. A. sense B. talent C. flavour D. taste

单选题Are you {{U}}positive{{/U}} that there's been no mistake?

单选题The soldier displayed remarkable courage in the battle.

单选题He became famous for her coverage of significant events during the Second World War.

单选题下面有3篇短文，每篇短文后有5道题，每道题后面有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}} Beauty Beauty has always been regarded as something praiseworthy. Almost everyone thinks attractive people are happier and healthier, have better marriages and have more respectable occupations. Personal consultants give them better advice for finding jobs. Even judges are softer on attractive defendants (被告). But in the executive circle, beauty can become a liability(不利因素). While attractiveness is a positive factor for a man on his way up the executive ladder, it is harmful to a woman. Handsome male executives were perceived as having more integrity than plainer men; effort and ability were thought to account for their success. Attractive female executives were considered to have less integrity than unattractive ones; their success was attributed not to ability to factors such as luck. All unattractive women executives were thought to have more integrity and to be more capable titan the attractive female executives. Interestingly, though, the rise of the unattractive overnight successes was attributed more to personal relationships and less to ability than was that of attractive overnight successes. Why are attractive women not thought to be able? An attractive woman is perceived to be more feminine and an attractive man more masculine than the less attractive ones. Thus, an attractive woman has an advantage in traditionally female jobs, but an attractive woman in a traditionally masculine position appears to lack the "masculine" qualities required. This is true even in politics. "When the only clue is how he or she looks, people treat men and women differently. " says Anne Bowman, who recently published a study on the effects of attractiveness on political candidates. She asked 125 undergraduate students to rank two groups of photographs, one of men and one of women, in order of attractiveness. The students were told the photographs were of candidates for political offices. They were asked to rank them again in the order they would vote for them. The results showed that attractive males utterly defeated unattractive men, but the women who had been ranked most attractive invariably received the fewest votes.

单选题下面的短文后列出了7个句子，请根据短文的内容对每个句子做出判断：如果该句提供的是正确信息，请选择A；如果该句提供的是错误信息，请选择B；如果该句的信息文中没有提及，请选择C。 The Race into Space American millionaire Dennis Tito will always be famous．He was the first tourist in space．“I spent sixty years on Earth and eight days in space and from my viewpoint，it was two separate lives，”Tito explained．He loved his time in space．“Being in space and looking back at earth is one of the most rewarding experiences a human being can have．” This kind of experience isn’t cheap．It cost $20 million．However，Tito achieved his dream，so he was happy．“For me it was a life dream．It was a dream that began when I didn't have any money，”he told reporters． On 30 April 2002，Mark Shuttleworth became the world's second space tourist．Shuttleworth is a South African businessman．At the age of twenty-eight，he also paid$20 million for the eight-day trip． Both Tito and Shuttleworth bought their tickets from a company called Space Adventures．The company has around 100 people already on their waiting list for flights into space．The spaceship to take them doesn't exist yet． Many of the customers are people who like adventure．They are the kind of people who also want to climb Mount Qomolangma．Other customers are people who love space．However，these people are worried．Because it's so expensive，only very rich people can go into space．They want space travel to be available to more people． That day may soon be here．Inter Orbital Systems(IOS)plans to send up to four tourists a week into space．The tours will depart from an island in Tonga．The company promises a package that includes forty-five days of astronaut training in Russia and California，seven days in space，and a vacation in Tonga，for $2 million． However，space flight is still very dangerous．Bill Readdy is NASA's deputy assistant administrator for space flight．He says that the chances of dying are about 1 in 500．Because of this，it may take time before space tourism really takes off．You might be able to go up，but will you come down?

单选题We shall take the treasure away to a safe place.

单选题 Cosmetic Surgery Surgery that can improve the way a person looks is becoming more and more popular in the United States. This kind of surgery is called cosmetic surgery, and both men and women are turning to this treatment as a way of keeping their appearance young as well as keeping competitive (有竞争力的) in their jobs. Men especially are beginning to turn to face-lifts (面部拉皮手术), liposuction (taking fat out of the body), and implants (putting artificial parts into their bodies) to help them look younger. As companies downsize (缩编) and move younger employees into higher positions, older employees in their late forties and early fifties fee[ the need to look and act younger in order to stay competitive. These operations are not without dangers, however. One young woman had an eye operation to get rid of the bags under her eyes. She described her experience as terrible. She said, "When he started cutting, I was fully awake. Even though he'd given me an injection near my eyes, I saw everything." She went on to explain, "I knew I had to keep still because of what he was doing. He was scraping (刮) away fat underneath my eyes. It took about ten minutes. After he finished, I felt I couldn't walk. I was so faint." Her troubles did not end after the operation for two weeks. Her eyes were swollen (肿胀的) and almost completely closed, and even dark glasses could not hide the side effects of the operation. Liposuction, taking fat out of the body, is probably the most popular cosmetic operation in the United States. It seems simple enough. First, a small cut is made over the place where the patient wants the fat removed. Next, a small pipe is put into the cut. A machine like a vacuum cleaner is then used to suck the fat out of the body. However, as one doctor explained, some problems can happen after the operation. He warned: "Irregular lumps and loose skin can result from this operation. If it is not evenly done, liposuction can produce a very lumpy result." Patients often must have more liposuction to correct the problem.

单选题An Interesting Phenomenon Animals seem to have the sense to eat when they are hungry and they do not eat more than their bodies need. It has been demonstrated that rats will, when given a choice over a period of time, prefer water with vitamins to water without vitamins even though there is no difference in taste or smell between the two water bottles. When a fragrant flavor was added to the vitamin-enriched fluid, the rats did seem to develop a taste for it and kept drinking it, even after the vitamins were switched to the clear water. In time, however, they broke the habit and went back to where the necessary vitamins were. In a classic experiment, babies of 6 to 12 months old were placed in a cafeteria feeding arrangement, with a wide selection of baby food before them. They were given whatever food they pointed to or appeared interested in. We are told that at first they showed some unusual eating patterns, but that over a period of time they managed to select well-balanced diet. So, in selecting food, rats and babies do seem to know and act on what's best for them. Apparently, there is a kind of "body wisdom", which humans soon lose. Most of us do not eat as wisely as we could. Many of our food preferences are culturally determined and influenced by long-established habits. Some people eat fox, dog and blackbirds, while we eat cows and pigs. So what people eat and how much they eat seems to be greatly influenced by what is going on around them.

单选题We can surely overcome all difficulties that may come up.

单选题We should contemplated the problem from all sides.A. deliberatedB. thoughtC. describedD. designed

单选题 下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。 {{B}} Pretty Good{{/B}} When Spanish football club Barcelona paid US$35 million for Ronaldinho last summer, they weren't buying a pretty face. "I am{{U}} (51) {{/U}}," admits the Brazilian superstar (超级明星). "But everyone has got a different kind of beauty. What I{{U}} (52) {{/U}}have is charm." Indeed he has. His buck teeth (龅牙), flowing hair, big smile, and of course his{{U}} (53) {{/U}}skills are always eye-catching on the pitch. The 23-year-old striker (中锋) scored two goals in a 3-2 win over Deportivo La Coruna on March 1. It was Barcelona's sixth win in a row and, thanks to their Brazilian's 10-goal contribution,{{U}} (54) {{/U}}looked like a poor season could now end a success. Ronaldinho - full name Ronaldo De Assis Moreira - is one of many South Americans who learned their skills playing in the backstreets before{{U}} (55) {{/U}}them off on the world stage. Great things were{{U}} (56) {{/U}}when Gremio signed him as a seven-year-old, and he soon became friends with Ronaldo, who was then the other young star of Brazilian football. It was Ronaldo who first called him Ronaldinho, which{{U}} (57) {{/U}}Little Ronaldo. He first{{U}} (58) {{/U}}for his country in 1999 but it was at the 2002 World Cup where he showed his real worth, scoring an unbelievable free-kick in Brazil's quarter-final victory{{U}} (59) {{/U}}England. "I have never failed to deliver in big matches," Ronaldinho says. "My game is based on improvisation (即兴表演). Often a forward does not have the time to decide whether to shoot or{{U}} (60) {{/U}}. It is instinct that gives out the orders." While he may not have David Beckham's good looks, Ronaldinho has a{{U}} (61) {{/U}}reputation off the pitch. At former club Paris Saint Germain, which sold him to Barcelona, he broke{{U}} (62) {{/U}}rules by going out and enjoying the city's nightlife. "Without doubt, Ronaldinho is the most{{U}} (63) {{/U}}player I have ever come across," says former PSG coach Luis Ferdandez. "The main{{U}} (64) {{/U}}for any coach is that one player without discipline can hurt the whole team." But Ronaldinho doesn't think he has done anything wrong. "I am just a young person who enjoys{{U}} (65) {{/U}}," he says.

单选题Pool Watch Swimmers can drown in busy swimming pools when lifeguards fail to notice that they are in trouble. The Royal Society for the Prevention of Accidents says that on average 15 people drown in British pools each year, but many more suffer major injury after getting into difficulties. Now a French company has developed an artificial intelligence system called Poseidon that sounds the alarm when it sees someone in danger of drowning. When a swimmer sinks towards the bottom of the pool, the new system sends an alarm signal to a poolside monitoring station and a lifeguard's paper. In trials at a pool in Ancenis, near Nantes, it saved a life within just a few months, says Alistair MeQuade, a spokesman for its maker, Poseidon Technologies. Poseidon keeps watch through a network of underwater and overheard video cameras. AI software analyses the images to work out swimmers trajectories. To do this reliably, it has to tell the difference between a swimmer and the shadow of someone being cast onto the bottom or side of the pool. "The underwater environment is a very dynamic one, with many shadows and reflections dancing around. " Says MeQuade. The software does this by "projecting" a shape in its field of view onto an image of the far wall of the pool. It does the same with an image from another camera viewing the shape from a different angle. If the two projections are in the same position, the shape is identified as a shadow and is ignored. But if they are different, the shape is a swimmer and so the system follows its trajectory. To pick out potential drowning victims, anyone in the water who starts to descend slowly is added to the software's "pre-alert" list, says MeQuade. Swimmers who then stay immobile on the pool bottom for 5 secounds or more are considered in danger of drowning. Poseidon double-checks that the image really is of a swimmer, not a shadow, by seeing whether it obscures the pool's floor texture when viewed from overhead. If so, it alerts the lifeguard, showing the swimmer's location on a poolside screen. The first full-scale Poseidon system will be officially opened next week at a pool in High Wycombe. Buckinghamshire. One man who is impressed with the idea is Travor Baylis, inventor of the clockwork radio. Baylis runs a company that installs swimming pools-and he was once an underwater escapologist with a circus. "I say full marks to them if this works and can save lives," he says. But he adds that any local authority spending ￡30,000-plus on a Poseidon system ought to be investing similar amounts in teaching children to swim.