单选题. Educators today are more and more often heard to say that computer literacy is absolutely necessary for college students. Many even argue that each incoming freshman should have permanent access to his or her own microcomputer. What advantages do computers offer the college students? Any student who has used a word processor will know one compelling reason to use a computer: to write papers. Although not all students feel comfortable composing on a word processor, most find revising and editing much easier on it. One can alter, insert, or delete just by pressing a few keys, thus eliminating the need to rewrite or re-type. Furthermore, since the revision process is less burdensome, students are more likely to revise as often as is necessary to end up with the best paper possible. For these reasons, many freshman English courses require the use of a word processor. Computers are also useful in the context of language courses, where they are used to drill students in basic skills. Software programs reinforce ESL (English as a Second Language) instruction, as well as instruction in French, German, Spanish, and other languages. By using these programs on a regular basis, students can improve their proficiency in a language while proceeding at their own pace. Science students take advantage of computers in many ways. Using computer graphic capabilities, for example, botany students can represent and analyze different plant growth patterns. Medical students can learn to interpret computerized images of internal body structures. Physics students can complete complex calculations far more quickly than they could without the use of computer. Similarly, business and accounting students find that computer spreadsheet programs are all but indispensable to many aspects of their work, while students pursuing careers in graphic arts, marketing, and public relations find that knowledge of computer graphic is important. Education majors learn to develop grading systems using computers, while social science students use computers for analyzing and graphically displacing their research results. It is no wonder, then, that educators support the purchase and use of microcomputers by students. A versatile tool, the computer can help students learn. And that is, after all, the reason for going to college.1. The word "literacy" in paragraph 1 means ______.

单选题 In the first year or so of Web business

单选题. It often seems that some possess superhuman eating powers, allowing them to down an entire pizza while remaining rail-thin. Others only need to think of a slice and gain five pounds. Now one doctor says there's evidence that genetics could be behind some of these differences. Regardless of how much you eat, your weight may be out of your hands. Vann Bennett, a biochemist at Duke University and his team led a new investigation and discovered why this happens. They engineered mice to have several common modifications of the gene found in humans. They observed that mice who had mutations of ankyrin-B took more glucose (葡萄糖) into their fat cells, which in turn made more fat. Typically, the cell membrane (膜) acts as a barrier to prevent glucose from entering these cells; the alteration kept the gate open. The change may serve a useful purpose. "Probably this is not always a bad thing," Bennett told Newsweek. "It could help people survive famines in the past. But today we have so much food that it probably is a bad thing." Our modern diets of fast food drive-thru windows and aisles of packaged snacks make the alteration work against us. Dieters have long been told to watch their calories and exercise more, but this new finding suggests that a blanket approach doesn't work for everyone. And the study illustrates a common problem for people: increased weight gain as a function of age. Our metabolism naturally slows with age, making it harder to maintain the weight of our 30-year-old selves when we're 50. Now add an unruly ankyrin-B gene, and it may seem impossible to stay slim. The mice in the study gained more weight when on high-fat diets. Bennett believes this is because once the fat cells received the glucose and start making more fat, they become sensitive to other fat. Despite being studied in mice, the researchers believe further research on this gene, and possibly others, could potentially create a field of customized diets and health plans based on genetics. Bennett envisions such assessments being performed at birth one day. For now, frustrated dieters can take comfort with one saying: It's not you, it's your genes.1. According to a doctor, what makes people different in weight? ______

单选题《复合题被拆开情况》 Brain-training software may be a waste of time. People who played "mind-boosting" games made the same modest cognitive gains as those who spent a similar amount of time surfing the web. "It

单选题. Questions 5 to 7 are based on the news report you have just heard.5.

单选题. Questions 16 to 18 are based on the passage you have just heard.1.

单选题21. Care of the soul is a gradual process ______ even the small details of life should be considered.

单选题. Questions 22 to 25 are based on the passage you have just heard.7.

单选题. Questions 16 to 18 are based on the passage you have just heard.1.

单选题The French government is to ban students from using mobile phones in the countrys primary，junior and middle schools.Children will be allowed to bring their phones to school，but not allowed to get

单选题A Among the boutiques in the canal district of Amsterdam is a shoe shop，called W-21，that has a selection of stylish footwear in the window.A select group of customers were recently invited there to ha

单选题《复合题被拆开情况》 Soot—also known as black carbon—heats up the atmosphere because it absorbs sunlight. But for years the institutions that focus on climate policy have played down the role of pollutants such

单选题 Bill Gates was 20 years old. Steve Jobs was 21

单选题[此试题无题干]

单选题. Specialization can be seen as a response to the problem of an increasing accumulation of scientific knowledge. By splitting up the subject matter into smaller units, one man could continue to handle the information and use it as the basis for further research. But specialization was only one of a series of related developments in science affecting the process of communication. Another was the growing professionalization of scientific activity. No clear-cut distinction can be drawn between professionals and amateurs in science: exceptions can be found to any rule. Nevertheless, the word "amateur" does carry a connotation that the person concerned is not fully integrated into the scientific community and, in particular, may not fully share its values. The growth of specialization in the nineteenth century, with its consequent requirement of a longer, more complex training, implied greater problems for amateur participation in science. The trend was naturally most obvious in those areas of science based especially on a mathematical or laboratory training, and can be illustrated in terms of the development of geology in the United Kingdom. A comparison of British geological publications over the last century and a half reveals not simply an increasing emphasis on the primacy of research, but also a changing definition of what constitutes an acceptable research paper. Thus, in the nineteenth century, local geological studies represented worthwhile research in their own right; but, in the twentieth century, local studies have increasingly become acceptable to professionals only if they incorporate, and reflect on, the wider geological picture. Amateurs, on the other hand, have continued to pursue local studies in the old way. The overall result has been to make entrance to professional geological journals harder for amateurs, a result that has been reinforced by the widespread introduction of refereeing, first by national journals in the nineteenth century and then by several local geological journals in the twentieth century. As a logical consequence of this development, separate journals have now appeared aimed mainly towards either professional or amateur readership. A rather similar process of differentiation has led to professional geologists coming together nationally within one or two specific societies, whereas the amateurs have tended either to remain in local societies or to come together nationally in a different way. Although the process of professionalization and specialization was already well under way in British geology during the nineteenth century, its full consequences were thus delayed until the twentieth century. In science generally, however, the nineteenth century must be reckoned as the crucial period for this change in the structure of science.16. The growth of specialization in the 19th century might be more clearly seen in sciences such as ______.

单选题. Kidnapping is the cruelest crime of the 20th century. There is not the political passion behind most hijacking; the motive is greed for money. The victims, provided their families are rich enough, are chosen at random. With the constant exposure by the media of personal fame and fortune, most people are vulnerable than ever. The most notorious kidnapping began on the evening of March 1, 1932, when someone placed a home-made ladder against the New Jersey home of Colonel Charles Lindbergh and stole his blond, blue-eyed baby son. A ransom (赎金) note was left from the kidnapper. Lindbergh, the first pilot to fly solo across the Atlantic, was the most popular man in America. When the boy was found a few miles away with his head crushed in, the whole nation was shocked and Congress passed the "Lindbergh Kidnap Law", with the death penalty for transporting a kidnap victim across a state line. The kidnapper, Bruno Richard Hauptmann, was caught two-and-a-half years later, when he exchanged some of the ransom money. He was executed in 1936. Kidnapping is an example of inflation: Hauptmann demanded $50,000; in 1973 the Getty family had to pay 1,300,000 pounds and the ransom delivery in two billion Italian lire weighed a ton. In this kidnapping, things went dreadfully wrong. When the kidnappers cut off Getty's fight ear and sent it to a newspaper, they forgot the postal strike which delayed this proof by three weeks. In the case of Muriel McKay, the kidnappers picked the wrong woman. The Hosein brothers had developed their plan when they saw Rupert Murdoch on a TV show in 1969 and heard him described as a millionaire, a word which stimulated their action. Yet, in tracing Murdoch's Rolls-Royce, they failed to realize that he had left for Australia with his wife and had loaned the car to Douglas McKay, a chairman of one of his enterprises. Attacking the wrong home, the Hoseins kidnapped Mrs. McKay by mistake, but still demanded their million pounds. The end result of kidnapping is never clean: Lindbergh never psychologically recovered. Young Paul Getty jokes: "It was a high-priced ear!" But the scars must be internal, too. The saddest comment came from Douglas McKay after the trial of the Hoseins: "They have got a life sentence. 1, too, have a life sentence wondering just what has happened to my dear wife."1. Why are most people vulnerable than ever according to the writer? ______