单选题If you want to stay young, sit down and have a good think. This is the research finding of a team of Japanese doctors, who say that most of our brains are not getting enough exercise—and as a result, we are ageing unnecessarily soon. Professor Taiju Matsuzawa wanted to find out why otherwise healthy farmers in northern Japan appeared to be losing their ability to think and reason at a relatively early age, and how the process of ageing could be slowed down. With a team of colleagues at Tokyo National University, he set about measuring brain volumes of a thousand people of different ages and varying occupations. Computer technology enabled the researchers to obtain precise measurements of the volume of the front and side sections of the brain, which relate to intellect (智能) and emotion, and determine the human character. (The rear section of the brain, which controls functions like eating and breathing, does not contract with age, and one can continue living without intellectual or emotional faculties. Contraction of front and side parts—as cells die of—was observed in some subjects in their thirties, but it was still not evident in some sixty-and seventy- year-olds. Matsuzawa concluded from his tests that there is a simple remedy to the contraction normally associated with age—using the head. The findings show in general terms that contraction of the brain begins sooner in people in the country than in the towns. Those least at risk, says Matsuzawa, are lawyers, followed by university professors and doctors. White collar workers doing routine work in government offices are, however, as likely to have shrinking brains as the farm worker, bus driver and shop assistant. Matsuzawa"s findings show that thinking can prevent the brain from shrinking. Blood must circulate properly in the head to supply the fresh oxygen the brain ceils need. "The best way to maintain good blood circulation is through using the brain," he says, "Think hard and engage in conversation. Don"t rely on pocket calculators. "

单选题Whatdoesthemanmean?A.Hethinkssheshouldvisithercousin.B.Hercousindoesn'tvisitveryoften.C.Hercousinisfeelingalotbettertoday.D.Hedoesn'tthinkhercousinhasbeenathometoday.

单选题 We all know that a magician does not really depend on "magic" to perform his tricks, but on his ability to act at great speed.{{U}} (26) {{/U}}, this does not prevent us from{{U}} (27) {{/U}}watching a magician produce rabbits from a hat. One of the greatest magician of all time was Harry Houdini, who mastered the art of{{U}} (28) {{/U}}He could{{U}} (29) {{/U}}himself from the tight test knots in seconds.{{U}} (30) {{/U}}no one really knows how he did this, there is no doubt{{U}} (31) {{/U}}he had made a close{{U}} (32) {{/U}}of every type of lock ever invented. He liked to carry a small steel needle like toolstrapped to his leg and he used this in{{U}} (33) {{/U}}of a key. Houdini once asked the Chicago police to{{U}} (34) {{/U}}him in prison. They{{U}} (35) {{/U}}him in chains and locked him up, but he freed himself{{U}} (36) {{/U}}an instant. The police{{U}} (37) {{/U}}him of having used a tool and locked him up again. This time he wore no clothes and there were chains{{U}} (27) {{/U}}his neck, waist, wrists, and legs; but he again escaped in a few minutes. Houdini had probably hidden his "needle" in a wax like{{U}} (39) {{/U}}and dropped it on the floor in the{{U}} (15) {{/U}}．{{U}} (16) {{/U}}he went past, he stepped on it so that it stuck{{U}} (40) {{/U}}the bottom of his foot. Once he was heavily chained up and enclosed in an empty wooden chest, the lid of{{U}} (41) {{/U}}was nailed down. The chest was dropped{{U}} (42) {{/U}}the sea in New York harbor. Just in one minute Houdini had swum{{U}} (43) {{/U}}the surface.

单选题{{I}} You will hear four dialogues or monologues. Before listening to each one, you will have 5 seconds to read each of the questions which accompany it. While listening, answer each question by choosing A, B, C or D. After listening, you will have 10 seconds to check your answer to each question. You will hear each piece ONLY ONCE.{{/I}} {{I}}Questions 11-13 are based on a dialogue between a doctor's secretary and a man who wants to see the doctor.{{/I}}

单选题Whatwastheman'smajorasanundergraduate?

单选题There was one thought that air pollution affected only the area immediately around large cities with factories and heavy automobile traffic. At present, we realize that although these are the areas with the worst air pollution, the problem is literally worldwide. On several occasions over the past decade, a heavy cloud of air pollution has covered the east of the United States and brought health warnings in rural areas away from any major concentration of manufacturing and automobile traffic. In fact, the very climate of the entire earth may be infected by air pollution. Some scientists consider that the increasing concentration of carbon dioxide in the air resulting from the burning of fossil fuels (coal and oil)is creating a "greenhouse effect"-conserving heat reflected from the earth and raising the world's average temperature, ff this view is correct and the world's temperature is raised only a few degrees, much of the polar ice cap will melt and cities such as New York, Boston, Miami, and New Orleans will be in water. Another view, less widely held, is that increasing particular matter in the atmosphere is blocking sunlight and lowering the earth's temperature-a result that would be equally disastrous. A drop of just a few degrees could create something close to a new ice age, and would make agriculture difficult or impossible in many of our top farming areas. Today we do not know for sure that either of these conditions will happen (though one recent government report drafted by experts in the field concluded that the greenhouse effect is very possible). Perhaps, if we are lucky enough, the two tendencies will offset each other and the world's temperature will stay about the same as it is now. Driven by economic profit, people neglect the damage on our environment caused by the "advanced civilization". Maybe the air pollution is the price the human beings have to pay for their development. But is it really worthwhile?

单选题[此试题无题干]

单选题Which of the following is the main point of the passage?

单选题According to the passage, the Industrial Revolution is responsible for the following results except

单选题The key problem in dealing with returned plastic beverage containers is______.

单选题In this passage, the writer implied that people in South Dakota________.

单选题{{B}}Text 1{{/B}} Play is the principal business of childhood, and more and more in recent years research has shown the great importance of play in the development of a human being. From earliest infancy, every child needs opportunity and the right material for play, and the main tools of play are toys. Their main function is to suggest, encourage and assist play. To succeed in this they must be good toys, which children will play often, and will come back to again and again. Therefore it is important to choose suitable toys for different stages of a child' s development. In recent years' research on infant development has shown the standard a child is likely to reach, within the range of his inherited abilities, is largely determined in the first three years of his life. So a baby's ability to profit from the right play materials should not be underestimated. A baby who is encouraged and stimulated, talked to and shown things and played with, has the best chance of growing up successfully. The next stage, from three to five years old, curiosity knows no bounds. Every type of suitable toys should be made available to the child, for trying out, experimenting and learning, for discovering his own particular ability. Bricks and jigsaws and construction toys; painting, scribbling and making things; sand and water play; toys for imaginative and pretending play; the first social games for leaning to play and get on with others. By the third stage of play development—from five to seven or eight years—the child is at school. But for a few more years play is still the best way of learning, at home or at school. It is easier to see which type of toys the child most enjoys. Until the age of seven or eight, play and work mean much the same thing to a child. But once reading has been mastered, then books and school become the main source of learning. Toys are still interesting and valuable, they lead on to new hobbies, but their significance has changed—to a child of nine or ten years, toys and games mean, as to adults, relaxation and fun.