单选题And the cars are tested for {{U}}defects{{/U}} before leaving the factory.

单选题In 1975 the United States Army began to assign women to positions previously classified as having combat status.

单选题 阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。 {{B}} How the Body Keeps the Same Temperature{{/B}} The temperature of your body should be always just the same, no matter whether the weather is hot or cold. That is why the doctor uses his thermometer when you are sick. When you are well, your temperature is ninety-eight and six tenths degrees. If he finds it {{U}}(51) {{/U}} than that, it is a sure sign that something is wrong. The body keeps the same temperature all the time, because it balances (平衡) the heat it produces and {{U}}(52) {{/U}} off. It is always burning up food and producing heat. It can produce heat faster when it needs to or give off heat faster when it becomes too warm. Let's see {{U}}(53) {{/U}} this happens. The heat of your body is given off chiefly through the skin. When you are {{U}}(54) {{/U}}, your skin is tight and shows "goose flesh". When you get chilly (寒冷的),you must dance around to keep warm or {{U}}(55) {{/U}} you will shiver (颤抖). {{U}}(56) {{/U}} your muscles begin to work, burn up fuel, and produce more heat. It is not {{U}}(57) {{/U}} to shiver, so you usually prefer warming up by exercise, or put {{U}}(58) {{/U}} more clothes to keep heat in. When you are warm, the skin is loose and soft. It is so supplied {{U}}(59) {{/U}} blood that heat is given off rapidly. If you get too hot, you begin to sweat, and {{U}}(60) {{/U}} body heat is used in evaporating (蒸发) the moisture (潮湿) from your skin. You wear less clothing, too, in warm {{U}}(61) {{/U}} or in a warm room, so that warmth can be given off freely. You feel you don't {{U}}(62) {{/U}} exercising because your body is warm {{U}}(63) {{/U}},and the extra heat produced by exercise makes you uncomfortable. You can see from this why you {{U}}(64) {{/U}} differently in different kinds of weather. In summer, when it is warm, you feel tired and lazy. You do not care to work or play, but enjoy lying and doing nothing. When you get out of doors in winter, the cold air makes you feel {{U}}(65) {{/U}} You want to run and play.

单选题Techniques to harness the energy of the sun are being developed. A. convert B. store C. utilise D. receive

单选题It is virtually impossible to persuade him to apply for the job.

单选题John is {{U}}collaborating{{/U}} with Mary in writing an article. A. cooperating B. competing C. combining D. arguing

单选题{{B}}第二篇{{/B}} {{B}} Male and Female Pilots Cause Accidents Differently{{/B}} Male pilots flying general aviation (private) aircraft in the United States are more likely to crash due to inattention or flawed decision-making, while female pilots are more likely to crash from mishandling the aircraft. These are the results of a study by researchers at the Johns Hopkins University Bloomberg School of Public Health. The study identifies the differences between male and female pilots in terms of circumstances of the crash and the type of pilots error involved. "Crashes of general aviation aircraft account for 85 percent of all aviation deaths in the United States. The crash rate for male pilots as for motor vehicle drivers, exceeds that of crashes of female pilots," explains Susan P. Baker, MPH, professor of health policy and management at the Bloomberg School of Public Health. "Because pilot youth and inexperience are established contributors to aviation crashes, we focused on only mature pilots, to determine the gender differences in the masons for the crash." The researchers extracted data for this study from a large research project on pilot aging and flight safety. The data were gathered from general aviation crashes of airplanes and helicopters between 1983 and 1997, involving 144 female pilots and 267 male pilots aged 40--63. Female pilots were matched with male pilots in a 1:2 ratio, by age, classes of medical and pilot certificates, state or area of crash, and year of crash. Then the circumstances of the crashes and the pilot error involved were categorized and coded without knowledge of pilot gender. The researchers found that loss of control on landing or takeoff was the most common circumstance for both sexes, leading to 59 percent of female pilots' crashes and 36 percent of males'. Experiencing mechanical failure, running out of fuel, and landing the plane with the landing gear up were among the factors more likely with males, while stalling was more likely with females. The majority of the crashes--95 percent for females and 88 percent for males--involved at least one type of pilot error. Mishandling aircraft kinetics was the most common error for both sexes, but was more common among females(accounting for 81 percent of the crashes) than males (accounting for 48 percent). Males, however, appeared more likely to be guilty of poor decision-making, risk-taking, and inattentiveness, examples of which include misjudging weather and Visibility or flying an aircraft with a known defect. Females, though more likely to mishandle or lose control of the aircraft, were generally more careful than their male counterparts. inattention n.疏忽 flawed adj. 有缺陷的 mishandle v. 瞎弄,乱处理 MPH(Master of Public Health) 公共卫生硕士 stall v. (飞机) 失速, (发动机) 熄火 kinetics n. 动力学

单选题Different While the cities of China have undergone modernization evident in the rising towers and bright lights that have awakened the sleeping country, the countryside remains largely the same. Rectangular rows of rice fields litter the long lanes of water designed to provide the constant supply of water that is vital to producing the crop. The experience is not unlike driving through the American Midwest, only rice not corn dominates the landscape. Four years ago, when I last took this trip, the roads were dust and telephone wires did not run parallel to the highway. Bare roads have been replaced by sleek, newly paved highways running from Shanghai to Nanking, to my smaller, home city, Wuhu. Unlike the changes I had heard of and expected in Shanghai, Wuhu was much more of a surprise. The small city where I was born had grown up as I have. There are large high-rise buildings, each ringed with smaller buildings around it, many of these apartment complexes. Little seemed familiar and I wonder flat built of brick and mortar had become. Perhaps I shouldn't have been surprised to find out that their home had been demolished and rebuilt as a six story apartment complex as well. Walking up to the second floor I saw my grandfather's face peering out of the screen door. He began to smile as he saw me, and so did I. Their home is now no different from a western apartment. Equipped with the modem amenities of a gas stove, a toilet, a shower this was indeed different from four years ago.

单选题Relief workers were shocked by what they saw.

单选题{{B}}第二篇{{/B}} Sharing Silence Deaf teenagers Orlando Chavez and German Resendiz have been friends since kindergarten (幼儿园). Together the two boys, who go to Escondido High School in California, have had the difficult job of learning in schools where the majority of the students can speak and hear. Orlando lost his hearing at the age of one. German was born deaf, and his parents moved from Mexico to find a school where he could learn sign language. He met Orlando on their first day of kindergarten. "We were in a special class with about 25 other deaf kids," German remembers. "Before then, I didn't know I was deaf and that I was different. " "Being young and deaf in regular classes was very hard," signs Orlando. "The other kids didn't understand us and we didn't understand them. But we've all grown up together, and today, I'm popular because I'm deaf. Kids try hard to communicate with me. " Some things are very difficult for the two boys. "We can't talk on the phone, so if we need help, we can't call an emergency service," German signs. "And we can't order food in a drive-thru. " Despite their difficulties, the two boys have found work putting food in bags at a local supermarket. They got their jobs through a "workability" program, designed for teenagers from local schools with different types of learning disabilities. German has worked in the supermarket since August, and Orlando started in November. "The other people who work here have been very nice to us," Orlando signs. "They even sign sometimes. At first, we were nervous, but we've learned a lot and we're getting better. " The opportunity to earn money has been exciting, both boys said. After high school, they hope to attend the National Technical Institute for the Deaf in New York.

单选题His sole motive was to make her happy.

单选题Common-cold Sense 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 opportunity 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 smooth 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 trying. Hot mixtures of sugar(or honey), lemon, and water have real benefits.

单选题His heart gave a sudden Uleap/U when he saw her.

单选题The curious look from the strangers around her made her feel uneasy .

单选题He purchased a ticket and went up on the top deck.

单选题Broadband Broadband technology is seen as the key to the new digital economy. In this rapidly changing world, media and technology information can be sent via phone calls and downloads like music, graphics, business information or films. The simpler the information, the smaller the package and the narrower the bandwidth needed to deliver it. Broadband is used for high speed Internet connections at a fixed monthly rate. It turns an exciting telephone line into a high speed digital line capable of carrying data up to 40 times conventional modem speeds. Any download is available at the click of a mouse, there is no dial-up as there is with standard Internet Service Providers. For home owners and families there are many advantages. One of the most important is simultaneous access to both telephone lines and the Internet. No queues and no delay. For businesses, broadband can improve customer relations and provide direct access to corporate e-malls and databases. Entire operations can go online.

单选题The two banks have announced plans to merge next year.

单选题The Ideal Husband Science now might be able to explain women's fascination with Brad Pitt's face and George Clooney's eyes. Women seem to (51) potential mate by how masculine their features are, new research shows. Men with square jaws and well-defined brow ridges are seen as good short-term partners, (52) those with more feminine traits such as a rounder face and fuller lips are perceived as better long-term mates. In the study by Daniel Kruger at the US's University of Michigan, 854 subjects viewed a series of (53) head shots that had been digitally changed to exaggerate or minimize masculine traits. They then (54) questions about how they expected the men in the photos to behave. Most participants said that those with more masculine features were (55) to be risky, competitive, and more apt to fight, challenge bosses, cheat on spouses and put less effort into parenting. Those with more feminine (56) were seen as good parents and husbands, hard workers and emotionally supportive mates. But, despite all the negative characteristics, when asked who they would choose for a short-term relationship, women selected the more masculine (57) men. Brad and George, both chiseled jaws and well-defined brows, then would be good for a (58) romance, not for something longer. The study was published in the December issue of the US journal Personal Relationships. Kruger said that from an evolutionary perspective, this (59) sense. The key is testosterone, the hormone responsible (60) the development of masculine facial features and other sexual characteristics. It has been found to affect the body's ability to fight disease: men with high levels of the hormone are typically (61) and healthy- traits women want to pass on to their children. However, increased testosterone has also been linked to (62) and violence in relationships. So, these men (63) produce high quality offspring, but they don't always make great parents or faithful mates, Kruger says. The scientific community have (64) skepticism toward physiognomy, which links facial characteristics to certain behavioral traits. But Kruger argues that the research is a valuable tool for understanding mating strategies. And, of course, for explaining why Tony Leung and Takeshi Kanesshiro have millions of female (65) . It might have to do with their genes. Or something to do with ours.

单选题Taking a Nap During the Day Medical experts say most Americans do not get (51) sleep. They say more Americans need to rest for a short period in the middle of the day. They are advising people to sleep lightly before (52) with other activities. One study earlier this year found that persons who sleep for a few minutes during the day were less (53) to die of disease. The study followed more than 2,300 Greek adults (54) about six years. Adult who rested for half an hour (55) three times a week had a 37 percent lower risk of dying from heart disease than those who did not nap. Study organizers said the strongest evidence was in working men. They said naps might improve (56) by mitigating tension caused by work. Some European and Latin American businesses have supported the (57) of napping for many years. They urge people to (58) work, go home and have a nap before returning. In the United States, some companies let workers rest briefly in their offices. They believe this reduces in their offices. They believe this reduces (59) and accidents, and (60) increases the amount of work a person can do. Sleep experts say it is likely that people make more mistakes at work than at other times. They say people should not carry out important duties when they feel (61) . And they say the best thing to do is to take a nap. About twenty minutes of rest is (62) you need. Experts say this provides extra energy and can increase your effectiveness (63) the end of the day. But experts warn that a nap (64) last no more than twenty to thirty minutes. A longer nap will put the body into deep sleep and waking up will be (65) .

单选题{{B}}第三篇{{/B}} Plants in Desert Only special plants can survive in the terrible climate of a desert, for these are regions where the annual range of the soil temperature can be over 75℃. Furthermore, during the summer there are few clouds in the sky to protect plants from the sun's ray. Another problem is the fact that there are frequently strong winds which drive small-sharp particles of sand into the plants, tearing and damaging them. The most difficult problem for all forms of plant life, however, is the fact that the entire annual rainfall occurs during a few days or weeks in spring. Crasses and flowers in desert survive from one year to the next by existing through the long, hot, dry season in the form of seeds. These seeds remain inactive unless the right amount of rain falls. If no rain falls, or if insufficient rain falls, they wait until the next year, or even still the next. Another factor that helps these plants to survive is the fact that their life cycles are short. By the time that the water from the spring rains disappears--just a few weeks after it falls--such plants no longer need any. The perennials(多年生植物)have special features which enable them to survive as plants for several years. Thus, nearly all desert perennials have extensive root systems below ground and a small Shoot system above ground. The large root network enables the plant to absorb as much water as possible in a short time. The small shoot system, on the other hand, considerably limits water loss by evaporation (蒸发)。 Another feature of many desert perennials is that after the rainy season they lose their leaves in preparation for the long, dry season, just as trees in wetter climates lose theirs in preparation for the winter. This reduces their water loss by evaporation during the dry season. Then, in the next rainy season, they come fully alive once more, and grow new branches, leaves and flowers, just as the grasses and flowers in desert do.