填空题Infrared radiation can produce heat ______.

填空题Conservation or Wasted Effort? The black robin (旅鸫) is one of the world’s rarest birds. It is a small, wild bird, and it lives only on the island of Little Mangere, off the coast of New Zealand. In 1967 there were about fifty black robins there; in 1977 there were fewer than ten. (46) Energetic steps are being taken to preserve the black robin. (47) The idea is to buy another island nearby as a special home, a “reserve”, for threatened wild life, including black robins. The organizers say that Little Mangere should then be restocked (重新准备) with the robin’s food. Thousands of the required plants are at present being cultivated in New Zealand. Is all this concern a waste of human effort? (48) Are we losing our sense of what is reasonable and what is unreasonable? In the earth’s long, long past hundreds of kinds of creatures have evolved, risen to a degree of success and died out. In the long, long future there will be many new and different forms of life. Those creatures that adapt themselves successfully to what the earth offers will survive for a long time. (49) This is nature’s proven method of operation. The rule of selection—“the survival of the fittest”—is the one by which human beings have themselves arrived on the scene. We, being one of the most adaptable creatures the earth has yet produced, may last longer than most, (50) You may take it as another rule that when, at last, human beings show signs of dying out, no other creature will extend a paw (爪) to postpone our departure. On the contrary, we will be hurried out. Life seems to have grown too tough for black robins. I leave you to judge whether we should try to do anything about it. A. Some creatures, certain small animals, insects and birds, will almost certainly outlast (比……长久)man, for they seem even more adaptable. B. Those that fail to meet the challenges will disappear early. C. Detailed studies are going on, and a public appeal for money has been made. D. Both represent orders in the classification of life. E. Is it any business of ours whether the black robin survives or dies out? F. These are the only black robins left in the world.

填空题 Success Stories One of the most successful fashion companies in the world is Benetton. The Benetton family opened their first shop in Italy in 1968. (46) Benetton followed four marketing principles in order to achieve their success. The first principle is Consumer Concept. To build a successful business, you have to develop products around things people value, especially quality. (47) He created clothes to match people's wants: the style is casual; the colors and patterns are bold; and the quality is excellent. The System Link is another feature of good marketing. For Benetton, this means waiting to get information about what customers like and what they dislike before making the clothes. (48) . The Information Link means making sure the company responds quickly to people's demands. (49) This information is then sent to the main office in Italy. Benetton can use this information to identify popular products and to continue making them; it can also identify less popular products and stop making them. A final important marketing principle is the Retail Link. There are Benentton stores in countries around the world. All the stores have the same clothing, the same window displays, and the same approach to sales. (50) . The things people like about Benetton stores are that the quality is always high and the prices are generally low. And that spells success.A. The founder of Benetton began by asking people what they wanted.B. There used to be a good reason for this.C. When something is sold at a Benetton store, the store records information about the type, size, and color of the item.D. Today, there are Benetton shops in major cities all over the world.E. This means that customers can go into any Benetton store in the world and be sure of what they are buying.F. In other words, Benetton's clothes are made to order.

填空题Musical Training Can Improve Communication Skills American scientists say musical training seems to improve communication skills and language retardation. They found that developing musical skills involves the same process in the brain as learning how to speak. The scientists believe that could help children with learning disabilities. (46) She says musical training involves putting together different kinds of information, such as hearing music, looking at musical notes, touching an instrument and watching other musicians. This process is not much different from learning how to speak. (47) She further explains musical training and learning to speak each make us think about what we are doing. She says speech and music pass through a structure of the nervous system called the brain stem. (48) Until recently, experts have thought the brain stem could not be developed or changed. But Professor Krauss and her team found that musical training can improve a person's brain stem activity. The study involved individuals with different levels of musical ability. They were asked to wear an electrical device that measures brain activity. The individuals wore the electrode while they watched a video of someone speaking and a person playing a musical instrument—the cello. (49) The study found that the more years of training people had, the more sensitive they were to the sound and rhythm of the music. Those who were involved in musical activities were the same people in whom the improvement of sensory events was the strongest. (50) She says using music to improve listening skills could mean they hear sentences and understand facial expressions better. A. Both involve different senses. B. Nina Kraus is a neurobiologist (神经生物学家) at Northwestern University in Illinois. C. Some disabled children attended the musical training Class. D. It shows the importance of musical training to children with learning disabilities. E. Professor Krauss says cellos have sound qualities similar to some of the sounds that are important with speech. F. The brain stem controls our ability to hear.

填空题A．Goals B．History of Women's Rights Movement C．Start of Women's Rights Movement D．Traditional Status of Women E．Rights of Women F．Development

填空题 Mt. Desert Island The coast of the State of Maine is one of the most irregular in the world. A straight line running from the southernmost coastal city to the northernmost coastal city would measure about 225 miles. If you followed the coastline between these points, you would travel more than ten times as far. This irregularity is the result of what is called a drowned coastline. {{U}} {{U}} 1 {{/U}} {{/U}}At that time, the whole area that is now Maine was part of a mountain range that towered above the sea. As the glacier (冰川) descended, however, it expended enormous force on those mountains, and they sank into the sea. As the mountain sank, ocean water charged over the lowest parts of the remaining land, forming a series of twisting inlets and lagoons (咸水湖) . The highest parts of the former mountain range, nearest the shore, remained as islands. {{U}} {{U}} 2 {{/U}} {{/U}}Marine fossils found here were 225 feet above sea level, indicating the level of the shoreline prior to the glacier. The 2, 500-mile-long rocky coastline of Maine keeps watch over nearly two thousand islands. Many of these islands are tiny and uninhabited, but many are home to thriving communities. Mt. Desert Island is one of the largest, most beautiful of the Maine coast islands. Measuring 16 miles by 12 miles, Mt. Desert was essentially formed as two distinct islands. {{U}} {{U}} 3 {{/U}} {{/U}} For years, Mt. Desert Island, particularly its major settlement, Bar Harbor, afforded summer homes for the wealthy. Recently though, Bar Harbor has become a rapidly growing arts community as well. But, the best part of the island is the unspoiled forest land known as Acadia National Park. Because the island sits on the boundary line between the temperate (温带) and sub-Arctic zones, the island supports the plants and animals of both zones as well as beach, inland, and alpine (高山的) plants. {{U}} {{U}} 4 {{/U}} {{/U}}The establishment of Acadia National Park in 1916 means that this natural reserve will be perpetually available to all people, not just the wealthy. Visitors to Acadia may receive nature instruction from the park naturalists as well as enjoy camping, cycling, and boating. Or they may choose to spend time at the archeological museum, learning about the Stone Age inhabitants of the island. The best view on Mt. Desert Island is from the top of Cadillac Mountain. {{U}} {{U}} 5 {{/U}} {{/U}}From the summit, you can gaze back toward the mainland or out over the Atlantic Ocean and contemplate the beauty created by a retreating glacier. A. It also lies in a major bird migration lane and is a resting spot for many birds. B. Mt. Desert Island is one of the most famous of all of the islands left behind by the glacier. C. The wealthy residents of Mt. Desert Island selfishly keep it to themselves. D. The term comes from the activity of the ice age. E. This mountain rises 1, 532 feet, making it the highest mountain on the Atlantic seashore. F. It is split almost in half by Sones Sond, a deep and narrow stretch of water seven miles long.

填空题 下面的对文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第1～4段每段选择1个最佳标题；(2)第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项。 Science Fiction 1. Among the most popular books being written today are those that are usually classified(分类) as science fiction. Hundreds of titles are published every year and are read by all kinds of people. Furthermore, some of the most successful films of recent years have been based on science fiction stories. 2. It is often thought that science fiction is a fairly new development in literature, but its ancestors (先驱)can be found in books written hundreds of years ago. These books were often concerned with the presentation of some forms of ideal society, a theme that is still often found in modern stories. 3. Most of the classics of science fiction, however, have been written within the last hundred years. Books by writers such as Jules Verne and H. G. Wells, to mention just two well-known authors, have been translated into many languages. 4. Modern science fiction writers don't write about men from Mars(火星) or space adventure stories. They are more interested in predicting the results of technical developments on society and the human mind ; or in imagining future worlds that are a reflection of the world that we live in now. Because of this their writing has obvious political undertones (涵义). 5. In an age where science fact frequently overtakes (超过)science fiction, the writers may find it difficult to keep ahead of scientific advances. Those who are sufficiently clear-sighted to see the way we are going, however, may provide a valuable lesson on how to deal with the problems which society will inevitably face as it tries to master its new technology. A. Fairly New Development B. Classics of Science Fiction C. Difficulty in Keeping ahead of Scientific Advances D. Origins of Science Fiction E. Themes of Modern Science Fiction

填空题Science and Technology There is a difference between science and technology. 1 . Science has to do with discovering the facts and relationships between observable phenomena in nature and with establishing theories that serve to organize these facts and relationships; technology has to do with tools, techniques, and procedures for applying the findings of science. 2 Progress in science excludes the human factor. Scientists, who seek to understand the universe and know the truth within the highest degree of accuracy and certainty, cannot pay attention to their own or other people"s likes or dislikes or to popular ideas about the fitness of things. 3 . But even an unpleasant truth is more than likely to be useful; besides we have the choice of refusing to believe it! But hardly so with technology; we do not have the choice of refusing to hear the sound produced by a supersonic (超音速的) aircraft flying overhead; we cannot refuse to breathe polluted air. 4 The purpose of technology is to serve people—people in general, not merely some people; and future generations, not merely those who presently wish to gain advantage for themselves. 5 Many people blame technology itself for widespread pollution, resource depletion (枯竭) and even social decay in general—so much so that the promise of technology is "obscured". That promise is a cleaner and healthier world. If wise applications of science and technology do not lead to a better world, what else will? A. Another distinction between science and technology has to do with the progress in each. B. Unlike science, progress in technology must be measured in terms of the human factor. C. What scientists discover may shock or anger people—as did Darwin"s theory of evolution. D. Science and technology are different. E. We are all familiar with the improper use of technology. F. Science is a method of answering theoretical questions; technology is a method of solving practical problems.

填空题 下面的对文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第1～4段每段选择1个最佳标题；(2)第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项。 {{B}}Geology (地质) and Health{{/B}} 1. The importance of particular metals in the human diet has been realized within the past few decades, and the idea that geology might be related to health has been recognized for a number of elements such as iodine(碘), zinc(锌)and selenium(硒). For example, soils with low iodine contents produce crops, and animals deficient in iodine. A lack of iodine in the human diet leads to some serious diseases. 2. The ultimate source of metals within the human body is rocks, which weather into soil, gaining or losing some of their chemical constituents. The crops we eat selectively remove from the soil the elements that they require for growth. The water we drink contains trace elements leached (过滤出) from rock and soil. Thus the geology and geochemistry of the environment have effects on the chemistry and health of plants, animals and people. 3. So far there is no data to suggest that people living on metal-rich soils experience a potential health hazard. The levels of metals within naturally contaminated soils are generally not high enough to cause serious health problems. Living on metal-rich, soils does not represent a health risk unless large quantities of soil are digested or metal-rich dust is inhaled. However, small children are particularly exposed to metal-rich topsoil in playgrounds and gardens. They are also the most likely ones to eat potentially dangerous metal-rich soil. 4. Heavy metals are persistent: they do not break down to other chemicals in the environment. Industrially polluted sites usually undergo intensive clean-up and rehabilitation because heavy metals are a health concern once they enter the food chain. Some trace metals are alleged to cause cancer and are also known to cause poisoning. 5. In contrast, naturally contaminated soils have not been subject to risk assessment studies and rehabilitation measures, despite the fact that they frequently possess metal concentrations well above those of such polluted by humans and above environmental quality criteria. 6. There is a vital need to understand the potential risks and long-term health effects of living on naturally contaminated soils. Future environmental investigations of naturally polluted soils should concentrate on the potential pathways of metals into the food chain and human body. Geologists should be part of such studies as they can provide the essential background information on rock and soil chemistry as well as the chemical forms of heavy metal pollution. A. No Evidence to Indicate Bad Effects of Naturally Contaminated Soil B. Potential Hazards of Human Contaminated Soils C. Research on Channels of Heavy Metals Getting into Human Food Chain D. Geology and Health Problems E. Rocks-the Ultimate Source of soil Pollution F. Long-term Health Effects on Children

填空题Virtual Driver Driving involves sharp eyes and keen ears, analyzing with a brain, and coordination between hands, feet and brain. A man has sharp eyes and keen ears, analyzes through his brain, and maintains coordination (协调) between his hands and brains. He can control a fast-moving car with different parts of his body. 1 Apparently there isn"t anyone in the driver"s cab (驾驶室), but there is in fact a virtual driver. This virtual driver has eyes, brains, hands and feet too. The minicameras on each side of the car are its eyes and are responsible for observing the road conditions ahead of it as well as the traffic to its left and right. If you open the boot (行李箱), you can see the most important part of the automatic driving system: a built-in computer. 2 The brain of the car is responsible for calculating the speeds objects surrounding the car are moving at, analyzing their position on the road, choosing the right path, and giving orders to the wheel and the control system. In comparison with the human brain, the virtual driver"s best advantage is that it reacts quickly. 3 However, it takes the world"s best racecar driver at least one second to react, and this doesn"t include the time he needs to take action. With its rapid reaction and accurate control, the virtual driver can reduce the accident rate on expressways considerably. In this case, is it possible for us to let it drive at any time and in any place? 4 With its limited ability to recognize things, the car can now only travel on expressways. The intelligent car determines its direction by the clear lines that mark the lanes clearly and recognizes vehicles according to their regular shapes. 5 . This being the case, people still have high hopes about driverless cars, and think highly intelligent cars are what the cars of the future should be like. A. Experts say that we cannot do that just yet. B. In the near future, intelligent cars will be put into commercial operation. C. This is the brain of the car. D. But how does an intelligent car control itself? E. It completes the processing of the images sent by the cameras within 100 milliseconds. F. However, it cannot recognize moving people and bicycles on ordinary roads that have no clear markings on them.

填空题Every Dog Has His Say Kimiko Fukuda always wondered what her dog was trying to say. Whenever she put on makeup, it would pull at her sleeve. 1 When the dog barks, she glances at a small electronic gadget(装置). The following "human" translation appears on its screen; "Please take me with you." "I realized that"s how he was feeling." says Fukuda. The gadget is called Bowlingual, and it translates dog barks into feelings. People laughed when the Japanese toymaker Takara Company made the world"s first dog-human translation machine in 2002. But 300,000 Japanese dog owners bought it. 2 "Nobody else had thought about it." said Masahiko Kajita, who works for Takara. "We spend so much time training dogs to understand our orders; what would it be like if we could understand dogs?" Bowlingual has two parts. 3 The translation is done in the gadget using a database containing every kind of bark. Based on animal behavior research, these noises are divided into six categories: happiness, sadness, frustration, anger, declaration and desire. 4 In this way, the database scientifically matches a bark to an emotion, which is then translated into one of 200 phrases. When a visitor went to Fukuda"s house recently, the dog harked a loud "wow wow". 5 It was followed by" I"m stronger than you" as the dog growled and sniffed(嗅) at the visitor. The product will be available in US pet stores this summer for about US $120. It can store up to 100 barks, even recording the dog"s emotions when the owner is away. A. A wireless microphone is attached to the dog"s collar, which sends information to the gadget held by the owner. B. Nobody really knows how a dog feels. C. This translated as "Don"t come this way". D. More customers are expected when the English version is launched this summer. E. Now, the Japanese girl thinks she knows. F. Each one of these emotions is then linked to a phrase like "let"s play", "Look at me", or "Spend more time with me".

填空题Keeping Cut Flowers 1. While everybody enjoys fresh cut flowers around his house, few people know how to keep them for as long as possible. This may be done by keeping in mind a few simple facts. 2. An important thing to remember about cut flowers is that they are sensitive to temperature. For example, studies have shown that cut carnations(康乃馨) retain their freshness eight times longer when kept at 12℃ than when kept at 26℃. Keeping freshly harvested flowers at the right temperatures is probably the most important aspect of flower care. 3. Flowers are not intended by nature to live very long. Their biological purpose is simply to attract birds or insects, such as bees, for pollination (授粉). After that, they quickly dry up and die. The process by which flowers consume oxygen and produce carbon dioxide(二氧化碳), called respiration(呼吸), generates the energy the flower needs to give the flower its shape and color. The making of seeds also depends on this energy. While all living things respire, flowers have a high level of respiration. A result of all this respiration is heat, and for flowers the level of heat relative to the mass of the flower is very high. Respiration also brings about the eventual death of the flower. Thus the greater the level of respiration, the sooner the flower dies. 4. Then how to control the rate at which flowers die? By controlling respiration. How is respiration controlled? By controlling temperature. We know that respiration produces heat, but the reverse(相反的过程) is also true. Thus by maintaining low temperatures, respiration is reduced and the cut flower will age more slowly. 5. Another vital factor in keeping cut flowers is the quality of the water in which they are placed. Flowers find it difficult to "drink" water that is dirty or otherwise polluted. Even when water looks and smells clean, it almost certainly contains harmful substances that can endanger the flowers. To rid the water of these unwanted substances, household chlorine bleach (含氯漂白剂) can be used in small quantities. It is recommended that 15 drops of chlorine bleach (at 4% solution) be added to each liter of water. The water and solution should also be replaced each day.A. Control of RespirationB. Beauty of Fresh Cut FlowersC. Role of RespirationD. Most Important Aspect of Flower CareE. Need for Clean WaterF. Ways of Stopping Respiration

填空题What We Take from and Give to the Sea As long as we have been on earth, we have used the sea around us. We take from the ocean, and we give to it. We take fishes from the ocean millions of kilograms of fish, every year, to feed millions of people. (46) . We take minerals from the ocean. One way to get salt is to place seawater in a shallow basin and leave it until it evaporates. (47) . Much gold and silver drift dissolved in the waters of the sea, too. But the sea does not give them up by simple evaporation. Other gifts from the sea are pearls, sponges and seaweed. Pearls become jewelry. (48) . Seaweed becomes food of many kinds--even candy, and ice cream as well as medicine. Believe it or not, fresh water is another gift from the sea. We cannot drink ocean water. (49) . But ocean water becomes fresh water when the salts are removed. In the future, we will find ourselves depending more and more on fresh water from the sea. The sea gives us food, fertilizer, minerals, water, and other gifts. What do we give the sea? Garbage. (50) . Huge as it is, the ocean cannot hold all the water that we pour into it. Dumping garbage into the ocean is killing off sea life. Yet as, the world population grows, we may need the sea and its gifts more than ever. We are finally learning that if we destroy our seas, we might also destroy ourselves. Hopefully, it is not too late.A. Natural sponges become cleaning aids.B. We pollute the ocean when we use it as a garbage dump.C. The area of the sea is becoming smaller and smaller.D. Along with salt, other minerals were left after evaporation.E. We even use their bones for fertilizer.F. Some of its contents may cause illness.

填空题Public Relations Public relation is a broad set of planned communications about the company, including publicity releases, designed to promote goodwill and a favorable image. Publicity then is part of public relations when it is initiated by the firm, 1 Since public relations involves communications with stockholders, financial analysts, government officials, and other noncustomer groups, it is usually placed outside the marketing department, perhaps as a staff department or outside consulting firm reporting to top management. This organizational placement can be a limitation because the public relations department or consultant will likely not be in tune with marketing efforts. Poor communication and no coordination may be the consequences. 2 this influence generally may be less than that provided by the other components of the public image mix. Publicity may be in the form of news releases 3 Publicity on the other hand should not be divorced from the marketing department, as it can provide a useful adjunct to the regular advertising. Furthermore, 4 ; some can result from an unfavorable press as a reaction to certain actions or lack of actions that are controversial or even down-right ill-advised. The point we wish to emphasize is that a firm is deluding itself if it thinks its public relations function, whether within the company or an outside firm, can take care of public image problems and opportunities. Many factors impact on the public image. Many of these have to do with the way the firm does business, 5 Public relations and directed publicity may help highlight favorable newsworthy events, and may even succeed in toning down the worst of unfavorable publicity, but the other components of the public image mix create more lasting impressions. A. that have favorable overtones for the company initiated by the public relations department B. not all publicity is initiated by the firm C. usually in the form of press releases or press conferences D. such as its product quality, the servicing and handling of complaints, and the tenor of the advertising E. what it means to the company is public relation F. Although the basic purpose of public relations is to provide positive influence on the public image

填空题Sleeping Giant Right now, an eruption is brewing in Yellowstone National Park. Sometime during the next two hours, the park's most famous geyser, Old Faithful, will begin gurgling boiling water and steam. (46) Old Faithful is not only a spectacular sight; it's also a constant reminder that Yellowstone sits on one of the largest volcanoes in the world. If you've never heard of Yellowstone's volcano, you're not alone. (47) Yet it has erupted three times during the last 2 million years. And one of those eruptions spewed enough volcanic ash and other debris to blanket half the United States. Yellowstone's volcano is sometimes called a "supervolcano", or extremely large and explosive caldera volcano. (48) This supervolcano formed over a hot spot, an extremely hot area in Earth's mantle. John Valley, a volcano professor, said that as the crust moves across a hot spot, the hot spot melts a section of the plate moving over it, forming "one volcano after another". The Yellowstone hot spot melts thick continental crust, which may cause catastrophic eruptions. According to experts the eruptions that created each of the three calderas in and around Yellowstone National Park were larger than any other volcanic eruption in recorded history. The most recent eruption, which happened 640, 000 years ago, produced at least 1,000 cubic kilometers of ash and debris, which blanketed most of the western half of the United States. (49) Geological evidence shows Yellowstone has blown its stack every 700,000 years or so. "If nature were truly that regular and reliable, we would be due for another eruption soon," said Valley. "However, these processes are subject to variability, so we don't really know when the next eruption will happen." (50) It is the volcanic energy that powers the geysers and hot springs, creates the mountains and canyons, and generates the unique ecosystems that support Yellowstone's diverse wildlife. A. Three calderas make up more than a third of Yellowstone National Park. B. The first Yellowstone eruption, 2 million years ago, released more than double that amount of ash and debris. C. The volcano is so inconspicuous (不显眼的) that few people know it exists. D. Then, an enormous fountain will shoot high into the air. E. While the active geological processes at Yellowstone do pose some risk to the public, they also make it a unique treasure. F. Yellowstone National Park attracts the interest of geologists the world over.

填空题Psychologists think that there are two types of emotion: positive and negative. Positive emotions include love, liking, joy, delight, and hope. They are aroused by something that appealsto a person. ______ They include anger, fear, despair, sadness, and disgust. In growing up, a person learns to cope with the negative emotions in order to be happy.A. Emotions, however, may be weak or strong.B. In order to feel happy, the person may choose unusual ways to avoid the emotion.C. An emotion does not have to be created by something in the outside world.D. A growing child not only learns his emotions but learns how to act in certain situations because of an emotion.E. For example, a student taking an examination may be so worried about failing that he cannot think properly.F. Negative emotions make a person unhappy or dissatisfie

填空题阅读下面这篇短文，短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为规定段每段选择1个正确的小标题；(2)第27～30题要求从所给的6个选项中选择4个正确选项，分别完成每个句子。 Human wants seem endless. When a starving man gets a meal, he begins to think about an overcoat; when an executive gets a new sports car, visions of country clubs and pleasure boats dance into view.2. The many wants of mankind might be regarded as making up several levels. When there is money enough to satisfy one level of wants, another level appears.3. The first and most basic level of wants involves food. Once this want is satisfied, a second level of wants appears: clothing and some tort of shelter. By the end of World War U these wants were satisfied for a great majority of American. Then a third level appeared. It in eluded such items as automobiles and new houses.4. By 1957 or 1958 this third level of wants was fairly well satisfied. Then, in the late 1950s a fourth level of wants appeared: the "life enriching" level. While the other levels involve physical satisfaction——the feeding, comfort, safety, and transportation of the human body——this level stresses mental needs for recognition, achivement and happiness.5. It includes a variety of goods and services, many of which could be called "luxury" items. Among them are vacation trips, the best medical and dental care, and entertainment. Also included fancy foods and the latest styles in clothing. On the fourth level, a greater percentage of consumers' spending goes to services, which on the first three levels more is spent on goods.6. A fifth level probably would involve wants that can be achieved best by comunity action. Consumers may be spending more on taxes to pay for government action against disease, ignorance, crime and prejudice. After filling our stomachs, our clothes closets, our garages, our teeth, and our minds, we now may seek to ensure the health, safety and leisure to enjoy more fully the good things on the first four levels.

填空题 下面的段位后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第1～4段每段选择1个最佳标题；(2)第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项。 Chinese Dialects (方言) The enormous differences in Chinese dialects have been a continuing problem ever since China became an empire in 221 B. C. , and it is one big reason why the country has remained impoverished (贫穷). Of the 600 million people who call themselves Chinese, all but a very small number speak Chinese. But the dialects vary so widely that the speech of Peking, for example, is as different from the speech of Canton as English is from German. There is to be sure, only one written language for all China, but it bears no phonetic(语音的)relationship to any of the spoken dialects. Moreover, it has so many symbols that only a tiny portion of the population has ever mastered it. As a result, most Chinese have been isolated for centuries from a free flow of ideas and from the economic progress that such a flow produces. Many dynasties tried with little success to break down the wall. After recognizing the importance of having a literate people for working in a technological world and for developing an effective propaganda(宣传) machine, the present government is putting everything into tackling the language problem. But the obstacles are so formidable(难以应付的) that the results cannot yet be predicted. At the heart the problem is the dialects. The dialects' prevented the evolution of a single written language based on phonetics. Instead, the Chinese were forced to develop a system that has no relation to sound, and they have clung to it for more than 3,000 years. When this system is applied to a whole language, it results in an overwhelming number of symbols. There are about 50,000 entries in a Chinese dictionary not counting the compounds(复合词). In order to be literate, a Chinese must learn 6,000; to be moderately educated, 12,000. An English-speaking child, having to conquer only a twenty-six-letter alphabet, has usually learned to read by the time he begins the third grade. A Chinese child needs at least five more years of elementary learning; in the seventh grade, he can barely read a Chinese newspaper. A. Dealing with the Problem of Various Dialects B. Difficulties in Learning Chinese C. Features of Chinese Dialects D. Differences in Chinese Dialects E. Dialects as Heart of the Problem F. Ways of the Government to Tackle the Problem

填空题It is believed that the widespread use of the "grid" will become possible in the next _____.

填空题 Teach Your Child Science1 It is important to make your child interested in science from an early age. Most young children ask a lot of questions and you should give careful scientific answers. Don't only give facts, but try to give explanations as well.2 Science is not just knowledge; it is a way of thinking, a method of finding out about the world. We see something. We try to explain it, and we test our idea by setting up an experiment. One day you come home and find the plant on the table has fallen over. You think it might be the wind from the open window or the cat, so you close the window, but leave the cat in and see what happens (you can also try leaving the window open and shutting the cat out). Of course, you remember there may be a third explanation.3 Ask your child to get a piece of string, some salt, a glass of water and an ice cube (冰块). Tell her to put the ice in the water, and then put one end of the string on the ice, leaving the other end over the side of the glass. Put a little salt on the ice. Wait a minute, and then pull the string; it should be attached to the ice. Ask the child: "What has happened?"4 Probably she won't know. Ask her whether fresh water or salt water freezes into ice first. If you live near the sea and have a cold winter, she should know fresh water freezes first as she will have seen that happen. Show her how to test the idea by half-filling two paper cups with water, adding salt to one. Then put them in the icebox and check every three minutes. Write the results in a table. The conclusion will be that salt changes the behaviour of water. Thinking about the string, we see the salt turned some of the ice into water. Then the salt went away into the water and the ice froze again leaving the string attached.5 Then you can ask, "Will water with salt boil at the same temperature as water without salt?" She can think, tell you her idea and you can test it in the kitchen. (take care because of the heat)