单选题下面有3篇短文后有5道题。请根据短文内容，为每题定1个最佳选项。{{B}}第一篇{{/B}} Heat and Health Extremely hot weather is common in many parts of the world. Although hot weather just makes most people hot, it can cause medical problems and death. Health experts say that since the year 1900, extremely hot weather has killed more people in the United States than any other natural event. One year—the unusually hot summer of 1980—heat caused about 1,700 deaths in the United States. In 1995, more than 600 people died in a similar heat wave in one city—Chicago. To measure extreme heat, government weather experts have developed the Mean Heat Index. It measures the average of how hot it is felt all day on an extremely hot day. Experts say it is the total heat of a hot day or several hot days that can affect health. Several hot days are considered a heat wave. Experts say heat waves often become deadly when the nighttime temperature does not drop much from the highest daytime temperature. The most common medical problem caused by hot weather is heat stress. Usually, it also is the least severe. For most people, the only result of heat stress is muscle pain. The pain is a warning that the body is becoming too hot. Doctors say drinking water will help the pain disappear after the body again has the right amounts of water and salt. For some people, however, the result is much more serious. For example, doctors say some people face a greatly increased danger from heat stress. These people have a weak or damaged heart, high blood pressure, or other problems of the blood system. Severe heat can help cause a heart attack or stroke. Health experts say this is the most common cause of death linked to hot weather.

单选题He shifted his position a little in order to (alleviate) the pain in his leg.

单选题It's tough looking for a job these days.A. differentB. digitalC. difficultD. direct

单选题The prince rounded up some loyal followers.

单选题Warm People Likely to Keep Cold at Bay Staying positive through the cold season could be your best defense against getting ill, new study findings suggest. In an experiment that exposed healthy volunteers to a cold or flu virus, researchers found that people with a generally sunny disposition were less likely to fall ill. The findings, published in the journal Psychosomatic Medicine, build on evidence that a "positive emotional style" can help ward off the common cold and other illnesses. Researchers believe the reasons may be both objective as in happiness boosting immune function and subjective as in happy people being less troubled by a scratchy throat or runny nose. "People with a positive emotional style may have different immune responses to the virus," explained lead study author Dr Sheldon Cohen of Carnegie Mellon University in Pittsburgh. "And when they do get a cold, they may interpret their illness as being less severe. " Cohen and his colleagues had found in a previous study that happier people seemed less susceptible to catching a cold, but some questions remained as to whether the emotional trait itself had the effect. For the new study, the researchers had 193 healthy adults complete standard measures of personality traits, self-perceived health and emotional "style". Those who tended to be happy, energetic and easy-going were judged as having a positive emotional style, while those who were often unhappy, tense and hostile had a negative style. The researchers gave them nasal drops containing either a cold virus or a particular flu virus. Over the next six days, the volunteers reported on any aches, pains, sneezing or congestion they had, while the researchers collected objective data, like daily mucus production. Cohen and his colleagues found that based on objective measures of nasal woes, happy people were less likely to develop a cold.

单选题He wore a shabby thin overcoat in the cold winter so that he fell ill.

单选题The expedition reached the {{U}}summit{{/U}} at 10:30 that morning. A. bottom of the mountain B. foot of the mountain C. top of the mountain D. starting point

单选题California, the first city on the American continent, reached its peak of development and power about AD 1100.A. summitB. tipC. heightD. apex

单选题Bathing in the sea in England a hundred years ago was not quite the light-hearted amusement that it is today. There are no running down from the hotel to the beach in a bath robe(长袍), no sunbathing, or lying about on the sands in bathing-dresses after the dip. Everything had to be done in an orderly and extremely polite manner. Mixed bathing was not allowed anywhere. Men and women each had their separate part of the beach, and they were not supposed to meet in the water. Bathing clothes were also closely controlled. Men usually wore simple bathing drawers and no more, but women were obliged to wear thick, cumbersome woolen garments that covered them completely from head to foot. These satisfied the demands of modesty, but they must have been extremely uncomfortable for swimming. Even thus decently covered, women were not supposed to show themselves on the beach while in bathing attire(浴衣). They had to wait their turn for a bathing machine, a sort of wooden cabin on wheels which was drawn right down to the water's edge by horses. On its seaward side a sort of hood or canopy(罩盖)stretched outwards and downwards over the water, completely hiding the bather until she was actually in the sea. There was a bathing woman in attendance, part of whose duty was to dip, in other words, to seize the bather as soon as she emerged and dip her forcibly under water two or three times. This was supposed to be for the benefit of her health, and no doubt it was all right in the hands of the gentle. But most bathing women were the reverse of gentle, and to be dipped by them must have been a strenuous form of exercise.

单选题Smoking will be {{U}}banned{{/U}} in all public places here.

单选题Neoclassical growth theory {{U}}predicts{{/U}} absolute convergence for economies with equal rates of savings and population growth and with access to the sane technology.

单选题Don't {{U}}omit{{/U}} this paragraph when you write your report. A.forget B.fail C.delete D.leave out

单选题 New US Plan for Disease Prevention Urging Americans to take responsibility for their health, Health and Human Services Secretary Tommy Thompson on Tuesday launched a $15 million program to try to encourage communities to do more to prevent chronic diseases like heart disease, cancer and diabetes (糖尿病)。 The initiative highlights the costs of chronic diseases—the leading causes of death in the United States—and outlines ways that people can prevent them, including better diet and increased exercise. "In the United States today, 7 of 10 deaths and the vast majority of serious illness, disability and health care costs are caused by chronic diseases," the Health and Human Services department said in a statement. The causes are often behavioral—smoking, poor eating habits and a lack of exercise. "I am convinced that preventing disease by promoting better health is a smart policy choice for our future." Thompson told a conference held to launch the initiative. "Our current health care system is not structured to deal with the rising costs of treating diseases that are largely preventable through changes in our lifestyle choices." Thompson said heart disease and strokes will cost the country more than $351 billion in 2003. "These leading causes of death for men and women are largely preventable, yet we as a nation are not taking the steps necessary for US to lead healthier, longer lives," he said. The $15 million is designed to go to communities to promote prevention, pushing for changes as simple as building sidewalks to encourage people to walk more. Daily exercise such as walking can prevent and even reverse heart disease and diabetes, and prevent cancer and strokes. The money will also go to community organizations, clinics and nutritionists who are being encouraged to work together to educate people at risk of diabetes about what they card do to prevent it and encourage more cancer screening. The American Cancer Society estimates that half of all cancers can be caught by screening, including Pap tests (巴氏试验) for cervical (子宫颈的) cancer mammograms (乳房X线照片) for breast cancer, colonoscopies (结肠镜检查) , and prostate (前列腺的) checks. If such cancers were all caught by early screening, the group estimates that the survival rate for cancer would rise to 95 percent.

单选题{{B}}第二篇{{/B}} {{B}}Dreams{{/B}} Studies show that in dreams things are seen and heard rather than thought. In terms of the senses, visual experience is present in almost all dreams; auditory experience in 40 to 50 percent; and touch, taste, smell, and pain in a relatively small percentage. A considerable amount of emotion is commonly present, usually a pure and single emotion such as fear, anger, or joy Two clearly distinguishable states of sleep exist. The first state, called NREM-sleep (non-rapid-eye-movement sleep), occupies most of the sleep period and is associated with a relatively low pulse and blood pressure, and few or no reports of dreaming. The second type of sleep, known as REM-sleep (rapid-eye-movement sleep) occurs cyclically during the sleep period with rapid eye movements and frequent dream reports. Typically, a person has four or five periods of REM-sleep during the night, whether the dreams are remembered often, rarely, or not at all; they occur at intervals of about 90 minutes and altogether make up about 25 percent of the night's sleep (as much as 50 percent in a newborn child). Evidence indicates that a dream period usually lasts from 5 to 20 minutes. Sounds and touches working on a dreamer can go into a dream if they occur during a REM-period. Although mental activity may be reported during NREM-sleep, these are usually short pieces of thoughtlike experiences. Modern dream research has focused on two general interpretations of dream content. In one view, dreams have no meaning of their own but are simply a process by which the brain integrates new information into memories. In the other view, dreams contain real meaning symbolized in a picture language distinct from conscious logical thought. If dreams express important wishes, fears, concerns, and worries of the dreamer, the study and analysis of dreams can help reveal previously unknown aspects of a person's mental functioning.

单选题Energy Resources Humans are using up the world's energy resources in a way no other animal has ever done. We use them to provide light and heating in our homes, to plough the land, to cook our food, to travel, to run our factories, and in countless other ways. Whether we are rural workers in a developing country or urban workers in a wealthy industrial country, we all need energy, although the sources of the energy and the amounts used vary greatly from one society to another. There are different forms or types of energy. Fuels such as coal, oil (petroleum), and wood contain chemical energy. When these fuels are burnt, the chemical energy changes to heat and light energy. Electricity is the most important form of energy in the industrialized world, because it can be transported over long distances via cables and transmission lines. It is also a very convenient form of energy, since it can power a wide variety of household appliances and industrial machinery. It is produced by converting the chemical energy from coal, oil, or natural gas in power stations. Energy resources fall into two broad groups: renewable and nonrenewable. Renewable resources are those which replenish(补充) themselves naturally and will either always be available hydroelectric power(水力发电), solar energy, wind and wave power, tidal energy, and geothermal energy (地热能) or will continue to be available provided supplies are given sufficient time to replenish themselves-peat(泥煤) and firewood. Nonrenewable resources are those of which there are limited supplies and which once used are gone forever. These include coal, oil, natural gas, and uranium (轴). Coal, oil, and natural gas are called fossil fuels(化石燃料) because they are the fossilized(使成化石) remains of plants and animals that lived hundreds of millions of years age. Burning fossil fuels releases chemicals that cause acid rain, and is gradually increasing the carbon dioxide in the atmosphere, causing global warming.

单选题Sleeplessness Insomnia or sleeplessness is a common complaint of women as they enter into menopause. Insomnia means having trouble falling asleep or staying asleep or the feeling that your sleep was not adequate for you. For women who are having night sweats, their sleep is broken by frequent awakening and therefore not refreshing. Generally once the night sweats are controlled a normal sleep pattern returns. If it doesn"t it may be, or have become chronic insomnia. How do you know? If you suffer from insomnia every night or most nights for a period of one month then you have chronic insomnia. If you"re not having night sweats then it"s time to look for other causes of sleeplessness. Depression and anxiety disorders are the most common causes of chronic insomnia. If you feel depressed you need to be checked by a qualified health care provider. Movement disorders such as restless leg syndrome are second on the list of insomnia for them, there are new medicines that may help. Other common causes are shift working, and pain. In up to 30% of people with chronic insomnia no cause can be identified. Medical treatment of these people has generally been with sleeping pills. It is estimated that 25% of the adult population in America took some type of medicines for sleep last year. It is generally agreed that sleeping pills should only be in the lowest dose and for the shortest possible time. Sleep hygiene is directed at changing bad sleep habits. The recommendations are:—Go to bed only when sleepy.—Do not wait up to a specilized time.—Avoid caffeine and alcohol in the evening, etc.

单选题She was so grateful to him and decided to marry him.A. carefulB. usefulC. hopefulD. thankful

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}} The famous Dr. Edward Jenner was busy trying to solve the problem of smallpox. After studying case after case, he still found no possible cure. He had reached an impasse in his thinking. At this point, he changed his tactics. Instead of focusing on people who had smallpox, he switched his attention to people who did not have smallpox. It turned out that dairymaids(挤奶女工)apparently never got the disease. From the discovery that harmless cowpox gave protection against deadly smallpox came vaccination(牛痘) and the end of smallpox as a scourge(灾祸) in the Western world. We often reach an impasse in our thinking. We are looking at a problem and trying to solve it and it seems there is a deadened, and "aporia" (the technical term in logic meaning "no opening"). It is on these occasions that we become tense, we feel pressured, overwhelmed, in a state of stress. We struggle vainly, fighting to solve the problem. Dr. Jenner, however, did something about this situation. He stopped fighting the problem and simply changed his point of view--from patients to dairymaids, picture the process going something tike this: Suppose the brain is a computer. This computer has absorbed into its memory bank all your history, your experiences, your training, your information received, through life, and it is programmed according to all this data. To change your point of view, you must reprogram your computer, thus freeing yourself to take in new ideas and develop new ways of looking at things. Dr. Jenner, in effect, by reprogramming his computer, erased the old way of looking at his smallpox problem and was free to receive new alternatives.

单选题We have to ask them to quit talking in order that all people present could hear us clearly.

单选题This is not typical of English, but is a feature of the Chinese language.