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}} Many Women Who Beat Cancer Don't Change Habits{{/B}} Many women who battle breast cancer will tell you it's a life-changing experience. However, a new study shows that for many {{U}}(51) {{/U}}, the changes aren't always positive or permanent. Beth Snoke has watched her mother and both grandmothers battle and survive breast {{U}}(52) {{/U}} So when she was diagnosed, there was no doubt in her mind {{U}}(53) {{/U}} she had to do. "I do exactly what the doctors say as far as the medicine that I'm on, as {{U}}(54) {{/U}} as the vitamins, the diet, and the fitness. And I can't stress enough {{U}}(55) {{/U}} important that is," says Beth Snoke. But a surprising new study shows that {{U}}(56) {{/U}} every woman who beats breast cancer is getting that message. In fact, nearly 40% of them say even {{U}}(57) {{/U}} surviving breast cancer, they haven't made significant changes in the {{U}}(58) {{/U}} they eat or how much they exercise. "Not all survivors are taking advantage of this teachable moment and making positive health changes in {{U}}(59) {{/U}} life," says Electra Paskett, PhD, at Ohio State University's Comprehensive Cancer Center. Paskett says diet and exercise have been proven to not only help women feel better during and after treatment, they may {{U}}(60) {{/U}} play a role in preventing some cancers from coming back. {{U}}(61) {{/U}} growing evidence, some women just aren't listening. "Colon cancer survivors {{U}}(62) {{/U}} exercise have actually been shown to have improved survival rates. So, yes, it is true that perhaps by making some of these healthy choices we can actually increase their health," says Paskett. As a breast cancer survivor {{U}}(63) {{/U}}, Paskett knows first hand how much difference diet and exercise can {{U}}(64) {{/U}} The challenge, she says, is to get more survivors to be more like Beth, during and after treatment. Experts say exercising more and eating a healthier diet can also cut {{U}}(65) {{/U}} on stress and help women overcome depression. There are more than 2 million breast cancer survivors living in the U.S. Of those, nearly a million have yet to change their diet or exercise routines.

单选题Accompanied by cheerful music, we began to dance.

单选题The hotel tries to meet the {{U}}diverse{{/U}} needs of its customers.

单选题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Since 1 992，cancer death rates among black Americans

单选题He was said to have been (removed) from the position of manager for a recent conflict with an important customer.

单选题{{B}}第三篇{{/B}} Priscilla Ouchida's "energy-efficient" house turned out to be a horrible dream. When she and her engineer husband married a few years ago, they built a ＄ 100,000, three--bedroom home in California. Tightly sealed to prevent air leaks, the house was equipped with small double-parted (双层玻璃) windows and several other energy-saving features. Problems began as soon as the couple moved in, however. Priscilla's eyes burned. Her throat was constantly dry. She suffered from headaches and could hardly sleep. It was as though she had suddenly developed a strange illness. Experts finally traced the cause of her illness. The level of formaldehyde(甲醛)gas in her kitchen was twice the maximum allowed by federal standards for chemical workers. The source of the gas? Her new kitchen cabinets and wall-to-wall carpeting. The Ouchidas are victims of indoor air pollution, which is not given sufficient attention partly because of the nation's drive to save energy. The problem itself isn't new. "The indoor environment was dirty long before energy conservation came along." Says Moschandreas, a pollution scientist at Geomet Technologies in Maryland. "Energy con- servation has tended to accentuate the situation in some cases." The problem appears to be more troublesome in newly constructed homes rather than old ones. Back in the days when energy was cheap, home builders didn't worry much about unsealed cracks. Because of such leaks, the air in an average home was replaced by fresh outdoor air about once an hour. As a result, pollutants generated in most households seldom built up to dangerous levels.

单选题I think the new strategy our manager came up with won"t work in the market.

单选题One special feature of Crystal Ear is that

单选题The reason for their unusual behavior remains a puzzle .

单选题Dangers Await Babies with Altitude Women who live in the world's highest communities tend to give birth to under-weight babies, a new study suggests. These babies may grow into adults with a high risk of heart disease and strokes. Research has hinted that newborns in mountain communities are lighter than average. Bur it wasn't clear whether this is due to reduced oxygen levels at high altitude or because their mothers are under-nourished — many people who live at high altitudes are relatively poor compared with those living lower down. To find out more, Dino Giussani and his team at Cambridge University studied the records of 400 births in Bolivia during 1997 and 1998. The babies were born in both rich and poor areas of two cities: La Paz and Santa Cruz. La Paz is the highest city in the world, at 3.65 kilometers above sea level, while Santa Cruz is much lower, at 0.44 kilometers. Sure enough, Giussani found that the average birthweight of babies in La Paz was significantly lower than in Santa Cruz. This was true in both high and low-income families. Even babies born to poor families in Santa Cruz were heavier on average than babies born to wealthy families in lofty La Paz. "We were very surprised by this result, " says Giussani. The results suggest that babies born at high altitude are deprived of oxygen before birth. "This may trigger the release or suppression of hormones that regulate growth of the unborn child. " says Giussani. His team also found that high-altitude babies tended to have relatively larger heads compared with their bodies. This is probably because a fetus starved of oxygen will send oxygenated blood to the brain in preference to the rest of the body. Giussani wants to find out if such babies have a higher risk of disease in later life. People born in La Paz might be prone to heart trouble in adulthood, for example. Low birthweight is a risk factor for coronary heart disease. And newborns with a high ratio of head size to body weight are often predisposed to high blood pressure and strokes in later life.

单选题I don't know why everything around me is going into confusion.A. considerationB. puzzleC. attractionD. contradiction

单选题The river widens considerably as it begins to turn west.

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}} {{B}} Diseases of Agricultural Plants{{/B}} Plants, like animals, are subject to diseases of various kinds. It has been estimated that some 30,000 different diseases attack our economic plants; forty are known to attack com, and about as many attack wheat. The results of unchecked plant disease are all too obvious in countries which have marginal food supplies. The problem will soon be more widespread as the population of the world increases at its frightening rate. Even in countries which are now amply fed by their agricultural products there could soon be critical food shortages. It is easy to imagine the consequences of some disastrous attack on one of the major crops; the resulting famines could kill millions of people, and the resulting hardship on other millions could cause political upheavals disastrous to the order of the world. Some plants have relative immunity to a great many diseases, while others have a susceptibility to them. The tolerance of a particular plant changes as the growing conditions change. A blight may be but a local infection easily controlled; on the other hand it can attack particular plants in a whole region or nation. An example is the blight which killed virtually every chestnut tree in North America. Another is the famous potato blight in Ireland in the last century. As a result of that, it was estimated that one million people died of starvation and related ailments. Plant pathologists have made remarkable strides in identifying the pathogens of the various diseases. Bacteria may invade a plant through an infestation of insect parasites carrying the pathogen. A plant can also be inoculated by man. Other diseases might be caused by fungus which attacks the plant in the form of a mold or smut or rust. Frequently such a primary infection8 will weaken the plant so that a secondary infection may result from9 its lack of tolerance. The symptoms shown may cause an error in diagnosis, so that treatment may be directed toward bacteria which could be the result of a susceptibility caused by a primary virus infection.

单选题Because of its vivid yellow, black and orange coloring, the emperor penguin stands out against the usually bleak landscape of its habitat.A. oddB. paleC. brightD. simple

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 pager. In trials at a pool in Ancenis, near Nantes, it saved a life within just a few months, says Alistair McQuade, a spokesman for its maker, Poseidon Technologies. Poseidon keeps watching 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 McQuade. 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 McQuade. Swimmers who then stay immobile on the pool bottom for 5 seconds 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He could not tolerate the extremes of heat in the desert.

单选题You'd better have the dog {{U}}surveyed {{/U}}before you offer to buy it.

单选题If wool is put into hot water, it tends to {{U}}shrink{{/U}}. A. disappear B. expand C. break D. contract

单选题Hillman's study, which will be published later this year, isn't definitive enough to stand alone. But it doesn't have to: it's part of a recent and rapidly growing movement in science showing that exercise can make people smarter. Last week, in a landmark paper, researchers announced that they had coaxed (耐心谨慎地摆弄) the human brain into growing new nerve cells, a process that for decades had been thought impossible, simply by putting subjects on a three -month aerobic - workout regimen (养生之道). Other scientists have found that vigorous exercise can cause older nerve cells to form dense, interconnected webs that make the brain run faster and more efficiently. And there are clues that physical activity can stave off the beginnings of Alzheimer's disease, ADHD and other cognitive disorders. No matter your age, it seems, a strong, active body is crucial for building a strong, active mind. What is the main idea of the paragraph?A. Exercising can cause a chain of chemical reactions in the brain.B. Exercising is helpful building a strong, active mind.C. Exercising is a good way to keep fit and stay healthy.D. Exercising can help the brain grow new nerve cells.