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.

单选题The police arrested the suspect yesterday and released him this morning.A. freedB. relievedC. kickedD. liberated

单选题Photos Big Business Now Photos that you might have found down the back of your sofa are now big business! In 2005, the American artist Richard Prince"s photograph of a photographer, Untitled (Cow- boy), was sold for $1,248,000. Prince is certainly not the only contemporary artist to have worked with so-called "found photographs"—a loose term given to everything from discarded(丢弃的) prints discovered in a junk shop to old advertisements or amateur photographs from a stranger"s family album. The German artist Joachim Schmid, who believes "basically everything is worth looking at", has gathered discarded photographs, postcards and newspaper images since 1982. In his on-going project, Archiv, he groups photographs of family life according to themes: people with dogs; teams; new cars; dinner with the family; and so on. Like Schmid, the editors of several self-published art magazines also champion (捍卫) found photographs. One of them, called simply Found, was born on one snowy night in Chicago, when Davy Rothbard returned to his car to find under his wiper (雨刷) an angry note intended for someone else: "Why"s your car HERE at HER place?" The note became the starting point for Rothbard"s addictive publication, which features found photographs sent in by readers, such as poster discovered in our drawer. The whole found-photograph phenomenon has raised some questions. Perhaps one of the most difficult is: can these images really be considered as art? And if so, whose art? Yet found photographs produced by artists, such Richard Prince, may riding his horse hurriedly to meet someone? Or how did Prince create this photograph? It"s anyone"s guess. In addition, as we imagine the back-story to the people in the found photographs artists, like Schmid, have collated (整理), we also turn toward to our own photographic albums. Why is memory so important to us? Why do we all seek to freeze in time the faces of our children, our parents, our lovers, and ourselves? Will they mean anything to anyone after we"ve gone? In the absence of established facts, the vast collections of found photographs give our minds an opportunity to wander freely. That, above all, is why they are so fascinating.

单选题He becomes famous for his coverage of significant events during the war.______

单选题The walls are made of Uhollow/U concrete blocks.

单选题Inspecting a Used Car The scariest part of buying a used car is not being completely sure of what condition it's in. A car that's been in a major accident is always a bigger risk, but sellers often try to hide this information. Andrew Blealdey, evaluator-inspector, runs a mobile vehicle inspection service in Montreal. For about $ 80 be will perform a full, unbiased inspection on a used vehicle. In his 10 years as a professional inspector, Bleakley has seen a lot. He warns "Watch out for dealer demonstration vehicles which are used not new. They may have been in a collision." He adds that it is not uncommon in Ontario and Quebec especially for unscrupulous sellers to roll back the odometer or to even disengage it. Bleakiey has special tools to check for this. Bleakley always recommends hiring all independent technician to inspect the condition of a used car before you buy it. The problem is finding someone qualified to do the inspection. Which he says generally doesn't mean just any mechanic. A thorough mechanical inspection includes checking the compression, all major systems, including the engine, electrical and charging systems, transmission and drive line, fluids, brakes, suspension, and steering. Essential, too, is all inspection of the car's body and finally a road test. There are, however, a few things everyone can do before buying a used Car: Do a visual check of the car. Look at the right rear door hinges. If they are very worn, or the door doesn't close well, the car may have been used as a taxi. Holes in the roof could mean the car was used for deliveries. Check for oil leaks on the pavement. Note that leaks are not necessarily a significant problem-- it depends on the cause. Don't assume that new 100 king brake and accelerator pedals mean the car hash't been driven much. Resellers know people check these details and can buy new pads for around $ 6. Copy down the vehicle identification number (VIN), a 17-character combination of numbers and letters, from the vehicle's dashboard. In Ontado, ask the dealer or seller for the Used Vehicle Information Package. This gives details of previous owners, any outstanding liens on the car, and thefair market value of the vehicle. collision n.碰撞；碰撞事故 odometer n.里程表 compression n.压缩；压缩量 brake n．刹车 pedal n．踏脚 lien n，扣押权 unscrupulous adj.办不择手段的 disengage v.松开；使脱离 transmission n．传输 suspension n，悬架 hinge n，铰链 dashboard n．仪表板

单选题 第一篇 Internet-based Instruction By almost any measure, there is a boom in Internet-based instruction. In just a few years, 34 percent of American universities have begun offering some form of distance learning (DL), and among the larger schools, it's closer to 90 percent. If you doubt the popularity of the trend, you probably haven't heard of the University of Phoenix. It grants degrees entirely on the basis of online instruction. It enrolls 90000 students, a statistic used to support its claim to be the largest private university in the country. While the kinds of instruction offered in these programs will differ, DL usually signifies a course in which the instructors post syllabi (课程大纲), reading assignments, and schedules on Websites, and students send in their assignments by e-mail. Generally speaking, face-to-face communication with an instructor is minimized or eliminated altogether. The attraction for students might at first seem obvious. Primarily, there's the convenience promised by courses on the Net: you can do the work, as they say, in your pajamas (睡衣). But figures indicate that the reduced effort results in a reduced commitment to the course. While drop-out rates for all freshmen at American universities is around 20 percent, the rate for online students is 35 percent. Students themselves seem to understand the weaknesses inherent in the setup. In a survey conducted for eCornell, the DL division of Cornell University, less than a third of the respondents expected the quality of the online course to be as good as the classroom course. Clearly, from the schools' perspective, there's a lot of money to be saved. Although some of the more ambitious programs require new investments in servers and networks to support collaborative software, most DL courses can run on existing or minimally upgraded (升级) systems. The more students who enroll in a course but don't come to campus, the more the school saves on keeping the lights on in the classrooms, paying doorkeepers, and maintaining parking lots. And, while there's evidence that instructors must work harder to run a DL course for a variety of reasons, they won't be paid any more, and might well be paid less.

单选题{{B}}第二篇{{/B}} {{B}} Why Not Eat Breakfast?{{/B}} Breakfast is not only the most important meal of the day, it is also the most neglected or skipped. Common reasons for not eating breakfast include lack of time, not feeling hungry, traditional dislike for breakfast, and dieting. Breakfast simply means "break the fast." Your body spends at least six to twelve hours each night in a fasting state. In the morning your body needs energy to rev up (转动起来) into high gear for the day's work ahead. If you skip breakfast, you are likely to concentrate less effectively in the late morning, feel irritable, short-tempered (易怒的), tired, or weak. When you choose not to eat breakfast, your body stays in slow gear. Also, people who skip breakfast often binge (无节制地大吃) later in the day at other meals or eat a high-calorie (高卡里) snack in the morning. Breakfast eaters tend to eat less fat during the day, have more strength and endurance and better concentration and problem-solving ability. A good breakfast should provide up to 1/3 of your total calorie needs for the day. On the average, we eat 400 less calories for breakfast than for dinner. If breakfast doesn't appeal to you in the morning, try eating a lighter dinner earlier in the evening or save half your dinner for breakfast in the morning. If you still aren't hungry in the morning, start with something small like juice or toast or have a mid-morning snack later when you are hungry. Not eating breakfast can also cause you to overeat, since a fall in blood sugar often makes you feel very hungry later. To make matters worse, since your body is in a slowed state, it will not be able to burn those extra calories very efficiently. If you feed your body healthy snacks and meals throughout the day, you are less likely to become extremely hungry and stuff yourself as soon as you begin to eat. Since breakfast is the first and most important meal of the day, choosing the right fuel is important. The best breakfast foods are fruits, juice, lean meat, and grain products such as breads, rice, noodles, and cereals.

单选题 Where Did All the Ships Go? The Bermuda Triangle is one {{U}} {{U}} 1 {{/U}} {{/U}}the greatest mysteries of the sea. In this triangular area between Florida, Puerto Rico and Bermuda in Atlantic, ships and airplanes {{U}} {{U}} 2 {{/U}} {{/U}}to disappear more often than in {{U}} {{U}} 3 {{/U}} {{/U}}parts of the ocean. And they do so {{U}} {{U}} 4 {{/U}} {{/U}}leaving any sign of all accident or any dead bodies. It is {{U}} {{U}} 5 {{/U}} {{/U}}that Christopher Columbus was the first person to record strange happenings in the area. His compass stopped working, a flame came down from the sky, and a wave 100 to 200-feet-high carried his ship about a mile away. The most famous disappearance in the Bermuda Triangle was the US Naval Air Flight 19. {{U}} {{U}} 6 {{/U}} {{/U}}December 5, 1945, five bomber planes carrying 14 men {{U}} {{U}} 7 {{/U}} {{/U}}on a training mission from the Florida coast. Later that day, all communications with Flight 19 were lost. They just disappeared without a trace. The next morning, 242 planes and 19 ships took part in the largest air-sea search in history. But they found nothing. Some people blame the disappearances {{U}} {{U}} 8 {{/U}} {{/U}}supernatural forces. It is suggested the {{U}} {{U}} 9 {{/U}} {{/U}}ships and planes were either transported to other times and places, kidnapped by aliens {{U}} {{U}} 10 {{/U}} {{/U}}attacked by sea creatures. There are {{U}} {{U}} 11 {{/U}} {{/U}}natural explanations, though. The US Navy says that the Bermuda Triangle is one of two places on earth {{U}} {{U}} 12 {{/U}} {{/U}}a magnetic compass points towards true north {{U}} {{U}} 13 {{/U}} {{/U}}magnetic north. {{U}} {{U}} 14 {{/U}} {{/U}}planes and ships can lose their way if they don't make adjustments. The area also has changing weather and is known {{U}} {{U}} 15 {{/U}} {{/U}}its high waves. Storms can turn up suddenly and destroy a plane or ship. Fast currents could then sweep away any trace of an accident.

单选题Sleep We all know that the normal human daily cycle of activity is of some 7-8 hours" sleep alternating with some 16-17 hours" wakefulness and that, broadly speaking, the sleep normally coincides with the hours of darkness. Our present concern is with how easily and to what extent this cycle can be modified. The question is no more academic one. The case, for example, with which people can change from working in the day to working at night is a question of growing importance in industry where automation calls insistently for round the clock working of machines. It normally takes from five days to one week for a person to adapt to a reversed routine of sleep and wakefulness, sleeping during the day and working at night. Unfortunately it is often the case in industry that shifts are changed every week; a person may work from 12 midnight to 8 a.m. one week, 8 a.m. to 4 p.m. the next, and 4 p.m. to 12 midnight the third and so on. This means that no sooner has he got used to one routine than he has to change to another, so that much of his time is spent neither working nor sleeping very efficiently. One answer would seem to be longer periods on each shift, a month, or even three months. Recent research by Bonier of the Netherlands, however, has shows that people on such systems will revert to their normal habits of sleep and wakefulness during the weekend and that this is quite enough to destroy any adaptation to night work built up during the week. The only real solution appears to be to hand over the night shift to a corps of permanent night workers whose nocturnal wakefulness may persist through all weekend and holidays. An interesting study of the domestic life and health of night shift workers was carried out by Brown. She found a high incidence of disturbed sleep, digestive disorder and domestic disruption among those on alternating day and night shifts, but no abnormal occurrence of these symptoms among those on permanent night work.

单选题Which of the following is NOT true of the scoring system for diving?

单选题Their parents once lived under very severe conditions.

单选题During the 20 -year period of 1976 to 1996 ,about 36 million new jobs were created in the United States - far more than in Japan and Western Europe combined. About 90 percent of these jobs were in service industries. During this same time span, some 22 million women joined the labor force and 97 percent of these women went to work in the service sector. These employment trends are expected to continue at least until the year 2010. For the period 1996 -2010 ,the Bureau of Labor Statistics predicts that over 21 million new jobs will be created and 93 percent of them will be in service industries. How many women went to work in the service sector during 1976 and 1996?A. 36 millionB. 22 millionC. More than 32 millionD. More than 21 million

单选题 Ford's Assembly Line When it comes to singling out those who have made a difference in all our lives, you cannot overlook Henry Ford. A historian a century from now might well conclude that it was Ford who most influenced all manufacturing, everywhere, even to this day, by introducing a new way to make cars—one, strange to say, that originated in slaughterhouses (屠宰场). Back in the early 1900%, slaughterhouses used what could have been called a "disassembly line". Ford reversed this process to see if it would speed up production of a part of an automobile engine called a magneto. Rather than have each worker completely assemble a magneto, one of its elements was placed on a conveyer, and each worker, as it passed, added another component to it, the same one each time. Professor David Hounshell of the University of Delaware, an expert on industrial development, tells what happened: "The previous day, workers carrying out the entire process had averaged one assembly every 20 minutes. But on that day, on the line, the assembly team averaged one every 13 minutes and 10 seconds per person." Within a year, the time had been reduced to five minutes. In 1913, Ford went all the way. Hooked together by ropes, partially assembled vehicles were towed (拖，拉) past workers who completed them' one piece at a time. It wasn't long before Ford was turning out several hundred thousand cars a year, a remarkable achievement then. And so efficient and economical was this new system that he cut the price of his cars in half, to $260, putting them within reach of all those who, up until that time, could not afford them. Soon, auto makers over the world copied him. In fact, he encouraged them to do so by writing a book about all of his innovations, entitled Today and Tomorrow. The Age of the Automobile has arrived. Today, aided by robots and other forms of automation (自动化), everything from toasters to perfumes is made on assembly lines.

单选题It is strictly prohibited that access to confidential documents is denied to all but a few.