单选题 Science is a dominant theme in our culture. Since it touches almost every facet of our life, educated people need at least some acquaintance with its structure and operation. They should also have an understanding of the subculture in which scientists live and the kinds of people they are. An understanding of general characteristics of science as well as specific scientific concepts is easier to attain if one knows something about the things that excite and frustrate the scientist. This book is written for the intelligent student or lay person whose acquaintance with science is superficial, for the person who has been presented with science as a musty storehouse of dried facts, for the person who sees the chief objective of science as the production of gadgets, and for the person who views the scientists as some sort of magician. The book can be used to supplement a course in any science, to accompany any course that attempts to give an understanding of the modern work, or--independently of any course --simply to provide a better understanding of science. We hope this book will lead readers to a broader perspective on scientific attitudes and a more realistic view of what science is, who scientists are, and what they do. It will give them an awareness and understanding of the relationship between science and our culture and an appreciation of the roles science may play in our culture. In addition, readers may learn to appreciate the relationship between scientific views and some of the values and philosophies that are pervasive in our culture. We have tried to present in this book an accurate and up-to-date picture of the scientific community and the people who populate it. That population has in recent years come to comprise more and more women. This increasing role of women in the scientific subculture is not a unique incident but, rather, part of the trend evident in all segments of society as more women enter traditionally male-dominated fields and make significant contributions. In discussing these changes and contribution, however, we are faced with a language that is implicitly sexist, one that uses male nouns or pronouns in referring to unspecified individuals. To offset this built-in bias, we have adopted the policy of using plural nouns and pronouns whenever possible and, when absolutely necessary, alternating he and she. This policy is far from being ideal, but it is at least an acknowledgment of the inadequacy of our language in treating half of the human race equally. We have also tried to make the book entertaining as well as informative. Our approach is usually informal. We feel, as do many other scientists, that we shouldn't take ourselves too seriously. As the reader may observe, we see science as a delightful pastime rather than as a grim and dreary way to earn a living.

单选题The sound of the roaring of a tiger is ______ heard by jungle dwellers feelings unease, for a year does not elapse ______ victims falling to the tiger's ferocity.

单选题5 Most people who develop Lyme disease, a tick-born infection that's endemic in parts of the Northeast and Midwest, are easily cured by taking an antibiotic like doxycycline for a couple of weeks. But for years a debate has raged over what to do about patients whose symptoms (fatigue, mental confusion, joint pain) never seem to clear up. One small but vocal group of doctors and patient advocates believes that Lyme's corkscrew-shaped spiro chetes have tunneled deep into their victims' bodies and can be eradicated only with inten sive antibiotic treatment over many months. Another group believes, just as adamantly, that the bacteria are long gone, making further treatment with powerful antibiotics which can lead to potentially fatal infections or blood clots--positively dangerous. Now comes word of two studies in the New England Journal of Medicine that show that long-term antibiotic treatment is no better than a placebo for folks with chronic Lyme disease. Originally scheduled for publication in July, the research is part of a group of find ings made public last week—just in time for the peak Lyme months of June and July. If con firmed by another major study that's looking at chronic Lyme and antibiotics from a slight ly different perspective, the results would seem to settle the question once and for all. Researchers from Boston, New Haven, Conn., and Valhalla, N.Y., followed 129 patients who had previously been treated for well-documented cases of Lyme disease. Sixty four were given antibiotics directly into their veins for a month, followed by two months of oral antibiotics. The others received dummy medications. A third of the chronic Lyme pa tients got better while taking the antibiotics. But so did a third of those on the placebo. Indeed, the results were so similar that a monitoring board decided to cut the trials short rather than add more subjects to the test groups. Unfortunately, the debate over chronic Lyme has become so heated that no one ex pects the controversy to go away. But both sides may take comfort in the other findings that were released by the New England Journal last week. After studying 482 subjects bit ten by deer ticks in a part of New York with a lot of Lyme disease, researchers concluded that a singly 200-mg dose of doxycycline dramatically cut the risk of contracting the dis ease. That good news is tempered somewhat by the fact that 80% of patients who develop the infection don't remember ever being bitten by a tick. (The bugs inject an anesthetic in to the skin to mask the pain and in their nymph stage are so small—about the size of a pop- py seed--that they are easily overlooked. ) There's still plenty you can do to protect yourself in a Lyme-infested neighborhood: tuck your pants in your socks, spray DEET on your clothing, check yourself and your kids for ticks. And if you develop a spreading red rash—particularly if it's accompanied by joint pain, chills or confusion make sure you see a doctor right away. The trick, as al ways, is to be vigilant without overreacting.

单选题______is the question of using existing resources to produce original and benefi cial solutions, ideas or products. A. Creativity B. Productivity C. Application D. Combination

单选题Her taste runs also to arrangements of Chopin and Joplin, as well as to Japanese and Brazilian music, part of______ approach that is winning her fans around the world.

单选题What he said in the meeting______everybody present.

单选题One of the most provocative ideas of modern physics was initiated by the British theorist P. Dirao.

单选题From historical point of view, high heels ______.

单选题A noisy aggressive cousin of the crow, the magpie has those bird's thievish habits.A.A noisy B.aggressive C.those D.habits

单选题Moving pictures present ______ scenes like battles, processions, storms, or races.

单选题According to Nobel's famous will, the interest on his fund will be ______ to five people who have made great contributions to mankind during the previous year.

单选题Although her mind was in a ______, she tried to stay calm for the sake of her children.

单选题These machines have raised______ many times.

单选题Don't Umeddle/U in my affairs, and in fact a I can handle them properly by myself.

单选题Helicopters rushed to where Shenzhou 5 ______ for the rescue of China"s first astronaut.

单选题Not surprisingly, people in the northern part of the country, where the work ethic and the climate push the pace of life ever upward, ______permanently in the fast lane.

单选题The shortage of water became more ______ this summer with the highest temperatures in 40 years.

单选题It can safely be inferred that Sept. 11 ______.

单选题It has long been a tenet of business theory that the best decisions are made after careful review and consideration. Only after weighing all the options and studying projections, say most professionals of business, can a practical decision be made. Now that model is being questioned by some business thinkers in the light of the theories of Malcolm Gladwell, who states that human beings often make better decisions in the blink of an eye. It is, at first glance, a theory so counter-intuitive as to seem almost ludicrous. Behind any decision, Gladwell posits, there is a behind-the-scenes subconscious process in which the brain analyzes; ranks in order of importance; compares and contrasts vast amounts of information; and dismisses extraneous factors, seemingly almost instantaneously, often arriving at a conclusion in less than two seconds. Citing a multitude of studies and examples from life, Gladwell shows how that split-second decision is often better informed than a drawn-out examination. Evanston and Cramer were the first to apply this theory to the business world. Evanston videotaped the job interviews of 400 applicants at different firms. He hen played only 10 seconds of each videotape to independent: human resources specialists. The specialists were able to pick out the applicants who were hired with an accuracy of over 90%. Cramer took the experiment even further, using only 5 seconds of videotape, without sound. To his astonishment, the rate of accuracy with which the HR specialists were able to predict the successful applicants fell only to 82%. Critics argue that these results illustrate a problem with stereotyping that impedes human resources specialists from hiring the best candidates even when they have the time to get below the surface: going for the candidate who "looks the part. " Gladwell argues that, on the contrary, the human mind is able to make complicated decisions quickly, and that intuition often trumps an extended decision-making process.

单选题I"m afraid the coffee I spilt will make a ______ on the carpet.