单选题{{B}}第二篇{{/B}} Have you ever suddenly felt that someone you know was in trouble-and he was? Have you ever dreamed something that came true later? Maybe you have ESP(超感官知觉). ESP stands for Extra Sensory Perception. It may be called a sixth sense. It seems to let people know about events before they happen, or events that are happening some distance away. Here is an example: A woman was doing washing. Suddenly she screamed. "My father is dead! I saw him sitting in the chair!' Just then, a telegram came. The woman's father had died of a heart attack. He died sitting in a chair. There are thousands of stories like this on record. Scientists are studying them to find out what is behind these strange mental messages. Here's another example--one of hundreds of dreams that have come true. A man dreamed he was walking along a road when a horse and carriage came by. The driver said, "There's room for one more." The man felt the driver was Death, so he ran away. The next day the man was getting on a crowded bus. The bus driver said, "There's room for one more." Then the man saw the driver's face was the same face he had seen in the dream. He wouldn't get on the bus. As the bus drove off, it crashed and burst into flames. Everyone was killed! Some people say stories like these are lies or coincidences. Others, including some scientists say that ESP is true. From studies of ESP, we may some day learn more about the human mind.

单选题As both a religion and a social force, Puritanism has made a widespread influence in the United States.______

单选题Hypertension is the medical term for persistent and sustained high blood pressure. It is one of the most (51) forms of heart disease. An understanding of blood pressure in (52) , healthy individuals is necessary in order to understand hypertension. Blood pressure is simply the force (53) against the walls of the body's arteries (血管) as blood flows through. The force, produced primarily by the pumping (54) of the heart, is essential for the (55) of the blood and its life-supporting nutrients(营养) to all parts of the body. Every time the heart (56) , called a systole, blood pressure increases. When the heart relaxes (57) beats(diastole), the pressure decreases. The normal systolic pressure of a person at vest is between 100 to 140, and the normal diastole is 60 to 90. Blood-pressure readings are expressed by both (58) , with the systolic over the diastolic: for example, 140/90. As these ranges suggest, there is a wide (59) of blood pressure for healthy people. Also, blood pressure (60) for healthy people during different times of the day and under different. (61) . It is lower when an individual is asleep than when he is excited or exerting himself physically. Therefore, a single blood-pressure reading above 140/90 does not (62) abnormality. When the pressure is continuously (63) , a person is considered to be suffering from hypertension. Hypertension is a stealthy(隐秘的) problem: a physician can discover it easily enough, but not a patient. (64) elevations, for example, may produce headaches, dizziness, fatigue, and weakness. But the patient is not likely to (65) these symptoms as having any other source than the increased elevation.

单选题Are You Getting Enough Sleep? What happens if you don't get enough sleep? Randy Gardner,a high school student in the United States,wanted to find out. He designed an experiment on the effects of sleeplessness for a school science project. With doctors watching him carefully, Gardner stayed awake for 264 hours and 12 minutes. That's eleven days and nights without sleep! What effect did sleeplessness have on Gardner? After 24 hours without sleep, Gardner started having trouble reading and watching television. The words and pictures were too blurry(模糊). By the third day,he was having trouble doing things with his hands. By the fourth day,Gardner was hallucinating(产生幻觉). For example,when he saw a street sign,he thought it was a person. He also imagined he was a famous football player. Over the next few days,Gardner's speech became so slurred(不 清楚)that people couldn't understand him. He also had trouble remembering things. By the eleventh day,Gardner couldn't pass a counting test. In the middle of the test he simply stopped counting. He couldn't remember what he was doing. When Gardner finally went to bed,he slept for 14 hours and 45 minutes. The second night he slept for twelve hours, the third night he slept for ten and one-half hours,and by the fourth night, he had returned to his normal sleep schedule. Even though Gardner recovered quickly,scientists believe that going without sleep can be dangerous. They say that people should not repeat Randy's experiment. Tests on white rats have shown how serious sleeplessness can be. After a few weeks without sleep,the rats started losing their fur(皮毛). And even though the rats ate more food than usual, they lost weight. Eventually the rats died. During your lifetime, you will probably spend 25 years or more sleeping. But why? What is the purpose of sleep? Surprisingly, scientists don't know for sure. Some scientists think we sleep in order to replenish(补充)brain cells. Other scientists think that sleep helps the body to grow and to relieve stress. Whatever the reason, we know that it is important to get enough sleep.

单选题The primary consideration in achieving a good balanced diet is not how much or how little we eat, but what we eat. Basically we need carbohydrates, protein, fat, vitamins and minerals, together with regular but not excessive exercise. Carbohydrates are found in foods such as bread, potatoes and sugar. They are excellent energy producers, but if eaten to excess may be largely converted to fat and a reduction in the amount of carbohydrates or "starchy" foods is one of the obvious Ways to reduce weight, since most of us eat too much of them anyway. According to the paragraphs, carbohydratesA. provide us with energy.B. are the main source of fat in the body.C. exist in all kinds of food.D. can make us feel goo

单选题He made a {{U}}considerable{{/U}} sum of money in real estate.

单选题Photojournalist Margaret White became famous for her {{U}}coverage{{/U}} of significant events during the Second World War. A. baggage B. orphanage C. reportage D. usage

单选题 阅读下面这篇短文，短文后列出7个句子，请根据短文的内容对每个句子做出判断。 Gary Finkle had his spinal cord(脊髓)severely injured in a swimming-pool accident seven years ago. A heavy-set, bearded man of 27, he is one of thousands of Americans who have lost virtually all feeling and movement from their shoulders down. He lives with his wife, Micky, and a female monkey named Jo outside the village of Andes, N.Y. Gary is a participant in a remarkable enterprise called Helping Hands: Simian Aides for the Disabled. The nonprofit organization supplies the disabled with trained monkeys that reduce the disabled person's dependency on family, friends and hired attendants. Using his mouth, Gary controls a small laser pointer mounted on his wheelchair. With it, he directs Jo to change books or magazines in his reading stand or to get him tapes for the cassette player. She brings him drinks from a refrigerator and clears away empties. When asked, Jo will fetch the remote control for the TV and place it on Gary's working table where he can operate it with his mouth-stick. The mouth-stick is a quadriplegic's(瘫痪者)primary tool. It can be used for practically everything: turning the pages of a book, dialing the telephone, changing channels on the TV, working at a typewriter or computer. If Gary's mouth-stick drops to the floor. Jo will pick it up and gently reinsert it into his mouth. "I can't imagine living without her," Gary says. He will always need human assistance for such things as getting in and out of bed, bathing or changing his clothes. But having Jo lessens his reliance on Micky, enabling her to do things in town without worrying about her husband's welfare.

单选题A Dolphin and an Astronomer One day in 1963, a dolphin named Elvar and a famous astronomer, Carl Sagan，were playing a little game. The astronomer was visiting an institute which was looking into the way dolphins communicate with each other. Sagan was standing on the edge of one of the tanks where several of these friendly, highly intelligent creatures were kept. Elvar had just swum up alongside him and had turned on his back. The dolphin wanted Sagan to scratch his stomach again, as the astronomer had done twice before. Elvar looked up at Sagan, waiting. Then, after a minute or so. the dolphin leapt up through the water and made a sound just like the word "more". The astonished astronomer went to the director of the institute and told him about the incident. "Oh, yes. That"s one of the words he knows," the director said, showing no surprise at all. Dolphins have bigger brain in proportion to their body size than humans have, and it has been known for a long time that they can make a number of sounds. What is more, these sounds seem to have different functions, such as warning each other of danger. Sound travels much faster and much further in water than it does in air. That is why the parts of the brain that deal with sound are much better developed in dolphin than in humans. But can it be said that dolphins have a "language", in the real sense of the word? Scientists don"t agree on this. A language is not just a collection of sounds, or even words. A language has a structure and what we call a grammar. The structure and grammar of a language help to give it meaning. For example, the two questions "Who loves Mary?" and "Who does Mary love?" mean very different things. If you stop to think about it, you will see that this difference doesn"t come from the words in the question but from the difference in structure. That is why the question "Can dolphins speak?" can"t be answered until we find out if dolphins not only make sounds but also arrange them in a grammatical order which affects their meaning.

单选题This college welcomes students from all over the world.A. receivesB. acceptsC. holdsD. chooses

单选题{{B}}第三篇{{/B}} {{B}} Attitudes to AIDS Now{{/B}} Most people say that the USA is making progress in fighting AIDS, but they don't know there's no cure and strongly disagree that "the AIDS epidemic is over," a new survey finds. The findings, released Thursday by the Kaiser Family Foundation, reassure activists who have worried that public concern about AIDS might disappear in light of recent news about advances in treatment and declines in deaths. "While people are very optimistic about the advances, they're still realistic about the fact that there is no cure," says Sophia Chang, director of HIV programs at the foundation. The Kaiser survey, like a recent USA TODAY Gallup Poll, does find that the number of people ranking AIDS as the country's top health problem has fallen. In the Kaiser Poll, 38% say it's the top concern, down from 44% in a 1996 poll; in the Gallup Poll, 29% say AIDS is No.1, down from 41% in 1992 and 67% in 1987. Other findings from Kaiser, which polled more than 1,200 adults in September and October and asked additional questions of another 1,000 adults in November: 52% say the country is making progress against AIDS, up from 32% in 1995. 51% say the government spends too little on AIDS. 86% correctly say AIDS drugs can now lengthen lives; an equal number correctly say that the drugs are not cures. 67% incorrectly say that AIDS deaths increased or stayed the same in the past year; 24% know deaths fell. Daniel Zingale, director of AIDS Action Council, says, "I'm encouraged that the American people are getting the message that the AiDS epidemic isn't over. I hope the decision-makers in Washington are getting the same message ..." We have seen signs of complacency.

单选题{{B}}第一篇{{/B}} Countless people are born with(生来就具有某种特点)the susceptibility to inherit a genetic disease. But scientific progress, especially the art of interfering with(干涉,阻碍) the genetic makeup of the human body, has helped doctors prevent more and more inherited disorders in the last decade. Dr. Thomas Caskey of the Baylor University College of medicine in Houston, Texas, is a pioneer in molecular biology(分子生物学). Through the techniques of genetic engineering(基因工程), he transfers genes from one organism to another. Caskey uses a certain type of virus, called a retrovirus(逆转录病毒), as the vehicle for the gene transfer. He first cripples the virus by removing the portion it needs to reproduce itself. The crippled virus becomes harmless while still being able to deliver a cargo to its destination. The cargo in Caskey's experiment is the human A-D-A gene, taken from bone marrow. A-D-A stands for(代表) adenosine deaminase(腺苷脱氨酶), an important component of the human immune system. A defect in the A-D-A gene leads to immune deficiency, rendering(致使) the body defenseless against infections. Caskey's purpose was to see if the human A-D-A gene could repair the defective immune system of a mouse. In the experiment the mouse was given a dose of radiation heavy enough to destroy its immune system. The animal next was injected with the crippled virus carrying the human A-D-A gene. According to Caskey, "the mouse will die within 10 to 14 days unless a successful transfer of bone marrow cells takes place. So we lethally irradiate and subsequently rescue the mouse by bone marrow transplantation(骨髓移植)with the cells that have been infected with the virus." The mouse now carries the human gene that salvaged its immune system. Bone marrow transplantation has an established place in contemporary medical practice. Employed to restore the immune system of certain cancer patients and of people who have been exposed to radiation, bone marrow transplantation works only if there is a good match between donor and recipient. The procedure would be much easier if bone marrow were like blood. People with type O blood are universal donors(万能供体). Their blood may be transfused to those who have different blood types. Unfortunately, there is no such thing as a universal bone-marrow type. Researchers may have found a way, however, to overcome this problem. The solution, if it works, would be to implant the patient with his own, perfectly matching(型配), bone marrow. The idea, as Caskey explains it, is to "correct the patient's disease with his own ceils, but those cells have added to them a normally functioning gene. "In other words, surgeons would take defective bone-marrow cells from the patient and put them into a laboratory dish where the cells would be exposed to a crippled virus carrying a healthy AD-A gene from a donor. The A-D-A gene would repair the defective cells and then the cells would be reinjected into the patient. Thus, in Caskey words, "the patient would be transplanted by his own ceils containing the added normal gene." The technique sounds deceptively(靠不住地) simple. In reality, though(可是,不过, 然而), it is complex. A number of laboratories have tested various intermediate steps of the process, but, according to Caskey, "no single laboratory has put together the entire technology successfully, and highly reproducibly, to proceed with a gene transfer at-tempt in man." For some time now, the U.S. National Institute of Health has been taking a close look at(仔细,研究) the effectiveness and safety of the procedure, as well as the ethical questions it raises. There doesn't seem to be much concern about the ethics of gene transfer into a human being to correct a genetic defect. Dr. W. French Anderson of N. I. H. wrote recently that "claims that new organs, designed personalities, master races, or Frankenstein(佛兰肯思泰因，一个创造怪物而自己被它毁灭的医学研究者，英国女作家Mary W.Shelly同名小说中的主角) monsters will be created can be given no credence in the light of(根据,从……来看) what is presently known. "And he added that a well-informed public is the best assurance against any future misuses of genetic engineering.

单选题 Bill Gates: Unleashing Your Creativity I've always been an optimists and I suppose that is rooted in my belief that the power of creativity and intelligence can make the world a better place. For as long as I can remember, I've loved learning new things and solving problems. So when I sat down at a computer for the first time in seventh grade, I was hooked. It was a chunky old teletype machine and it could barely do anything compared to the computers we have today. But it changed my life. When my friend Paul Allen and I started Microsoft 30 years ago, we had a vision of "a computer on every desk and in every home," which probably sounded a little too optimistic at a time when most computers were the size of refrigerators. But we believed that personal computers would change their world. And they have. And after 30 years, I'm still as inspired by computers as I was back in seventh grade. I believe that computers are the most incredible tool we can use to feed our curiosity and inventiveness—to help us solve problems that even the smartest people couldn't solve on their own. Computers have transformed how we learn, giving kids everywhere a window into all of the world's knowledge. They're helping us build communities around the things we care about and to stay close to the people who are important to us, no matter where they are. Like my friend Warren Buffett, I feel particularly lucky to do something every day that I love to do. He calls it "tap-dancing to work". My job at Microsoft is as challenging as ever, but what makes me "tap-dancing to work" is when we show people something new, like a computer that can recognize your handwriting or your speech, or one that can store a lifetime's worth of photos, and they say, "I didn't know you could do that with a PC!" But for all the cool things that a person can do with a PC, there are lots of other ways we can put our creativity and intelligence to work to improve our world. There are still far too many people in the world whose most basic needs go unmet. Every year, for example, millions of people die from diseases that are easy to prevent or treat in the developed world. I believe that my own good fortune brings with it a responsibility to give back to the world. My wife, Melinda, and I have committed to improving health and education in a way that can help as many people as possible. As a father, I believe that the death of a child in Africa is no less poignant or tragic than the death of a child anywhere else, and that it doesn't take much to make an immense difference in these children's lives. I'm still very much an optimist, and I believe that progress on even the world's toughest problems is possible—and it's happening every day. We're seeing new drugs for deadly diseases, new diagnostic tools, and new attention paid to the health problems in the developing world. I'm excited by the possibilities I see for medicine, for education and, of course, for technology. And I believe that through our natural inventiveness, creativity and willingness to solve tough problems, we're going to make some amazing in all these areas in my life.

单选题The secretary is {{U}}expected{{/U}} to explore ideas for post-war reconstruction of the area.

单选题Practically all species of animals communicate either through sounds or through a large repertory of soundless codes. A. Simultaneously B. Almost C. Absolutely D. Basically

单选题She read a poem which depicts the splendor of the sunset.

单选题Cement was {{U}}seldom{{/U}} used in building during the Middle Ages.

单选题They are worried about their Ucapacity/U to invest in the future.

单选题The discovery was sensational. A. sexy B. surprising C. exceptional D. exciting

单选题This is especially true in today's extremely harsh economic climate.A. difficultB. easyC. normalD. intelligent