单选题Woman: You are too careful. I can hardly put up with a car moving at this speed. Man: Once bitten twice shy. I was involved in a head-on collision a few months ago. I don"t want to repeat it. Question: What can we learn from the conversation?

单选题{{B}}Part B{{/B}} Malnutrition during weaning age—when breast milk is being replaced by semi-solid foods—is highly prevalent in children of poor households in many developing countries. While the etiology (病因学) is complex and multifactorial, the immediate causes are recognized as feeding at less than adequate levels for child growth and development, and recurrent infections, including diarrhea, resulting mainly from ingestion of contaminated foods. As a result, many young children, particularly between six months to two years of age, experience weight loss and impaired growth and development. Studies by investigators in various countries have concentrated on traditional food preparation methods and have resulted in offering cheap and practical answers to these problems based on familiar, indigenous and culturally acceptable home processing practices. Two such answers have arisen. Firstly, cereal fermentation is used for reducing the risk of contamination under the existing inappropriate conditions for food preparation and storage in many households. Secondly, a tiny amount of sprouted grains flour is used in preparation of weaning foods as a magic way to lessen the viscosity without decreasing energy density. A method to eliminate pathogenic (致病的) bacteria and inhibit their growth during storage of weaning preparations can benefit nutrition and health in young children considerably. Use of fermented foods for feeding children of weaning age appears to be an effective solution. Fermented foods have lower levels of diarrhoeal germ contamination, they are suitable for child feeding, and can be safely stored for much longer periods of time than fresh foods. The practice has been a traditional way of food preservation in many parts of the world. The anti-microbial properties of fermented foods and their relative higher safety—documented since the early 1900's—have been indicated in a number of studies. In Ghana, it is common to ferment maize dough before cooking it as porridge. In Kenya, cereal-based porridge and milk are traditionally fermented. Preserving milk in the form of yogurt has been known to many households living in hot climate. What are the underlying mechanisms by which fermentation processes help to prevent or reduce contamination? A possible answer suggests that during the fermentation process foods become more acid. This explains why diarrhea-causing bacteria are not able to grow in fermented foods as rapidly as in unfermented ones. It is also hypothesized that some of the germs present in the foods are killed or inhibited from growing through the action of antimicrobial substances produced during fermentation. The fermented foods can, therefore, be kept for a longer time compared to fresh ones. It has been shown that while contamination levels in cooked unfermented foods increase with storage time, fermented foods remain less contaminated. Whatever the underlying mechanisms, the fact is that the exercise reduces contamination without adding to the household cost both in terms of time and money. Its preparation is easy. The cereal flour is mixed with water to form a dough which is left to be fermented; addition of yeast (酵母), or mixing with a small portion of previously fermented dough is sometimes needed. The dough can then be cooked into porridge for feeding to the child. Although beneficial, unfortunately the practice is going out of fashion, partly because of current emphasis on the use of fresh foods, particularly for children. For example, a study on the use of fermented foods for young children in Kenya, demonstrated that while foods are still frequently fermented at home for child feeding, their use is becoming less popular, particularly in urban area where commercial products are more available. Clearly they now need to be promoted.{{B}}Directions:{{/B}} The statements below relate to the passage you have just read. Identify whether they are TRUE or FALSE and mark the corresponding letter (T for True and F for False) on the Answer Sheet with a single line through the center.

单选题Mum: Let's go and see grandma some time during the break. Daughter: Great. What time? Mum: ______ A. You name it. B. Are you ready? C. During the break. D. Take your time.

单选题In the last ten years, the Internet has opened up incredible amounts of information to ordinary citizens. But using the Internet can he like walking into a library where the books are all lying on the floor in piles. While tools like Google allow some structured search, much of the data from such searches is outdated or of questionable value. Some web enthusiasts have taken up the task of organizing information through a democratic means that only the Internet allows: an encyclopedia of the people, by the people, and completely free to copy and distribute. This ‘people’s encyclopedia’ of the Web — a free site called Wikipedia — has provided a unique solution by inviting individuals to participate in the process of rationalizing and updating web content. At the heart of this movement are wikis, web sites that allow users to directly edit any web page with one click of the mouse. Wikipedia — the largest example of these collaborative efforts — is a functioning, user-contributed online encyclopedia that has become a popular and highly regarded reference in just three years of existence. The goal of Wikipedia was to create an encyclopedia that could he shared and copied freely while encouraging people to change and improve the content. Each and every article has an “Edit this page” button, allowing anyone, even anonymous passersby, to add or delete any content on the page. It seems like a recipe for disaster and chaos, but it has produced surprisingly credible content that has been evaluated and revised by the thousands of international visitors to the site. For many, it finally realizes the original concept of World Wide Web creator Tim Berners-Lee — an online environment where people not only browse content, but freely and actively exchange information. The Wikipedia project was started by Jimmy Wales, head of Internet startup Bomis.com, after his original project for a volunteer, hut strictly controlled, free encyclopedia ran out of money and resources after two years. Editors with PhD degrees were at the helm of the project then, but it produced only a few hundred articles. Not wanting the content to languish, Wales placed the pages on a wiki website in January 2001 and invited any Internet visitors to edit or add to the collection. The site became a runaway success in the first year and gained a loyal following, generating over 20,000 articles and spawning over a dozen language translations. After two years, it had 100,000 articles, and in April 2004, it exceeded 250,000 articles in English and 600,000 articles in 50 other languages. Over 2,000 new articles are added each day across all the various languages. And according to website rankings at Alexa.com, it has become more popular than traditional online encyclopedias such as Britannica.com and is one of the top 600 most heavily visited websites on the internet.

单选题This summer, for the first time, Emory College let freshmen pick their own roommates in an online roommate-selection system that works on the same principles as computer dating. Students, using screen names to hide their identities, posted profiles of themselves detailing personality attributes, work habits, music and food preferences, and answers to questions like whether they hoped to "do almost everything" with their roommate or "lead separate but compatible lives. " Roommate-matching is a summer ritual that plunges college housing offices into the most intimate realm of sleep patterns, cleaning habits, and noise tolerance. Online matching is on the cutting edge. Housing officials at Emory, in Atlanta, say they expect that letting students pick their own roommates will increase the likelihood of compatibility. And there's little risk of hurt feelings if the e-mail exchanges do not lead to a match, since the initial round of contacts is done under screen names. Several studies have shown that roommates have an impact on the attitudes and social behavior of those they live with. And one recent study found that a roommate's academic performance has a small, but statistically significant, effect on the other roommate's grade-point average. Other studies, however, did not find that effect. The business of assigning roommates varies widely across the country. At Davidson College, the housing staff sort every freshman with careful hand-selection. The Davidson philosophy is that roommates should be as similar as possible, while halls should be as diverse as possible. "We had a match that seemed perfect, until we discovered that one was a cattle rancher's son and the other was a vegan (绝对素食者) ," said Ms. Kromm. "They should definitely meet, on the same hall. But we didn't want to put them in the same room. " Occasionally, an incoming student asks to be paired with an Asian, or says she might not be able to get along with a Republican. In such cases, Ms. Kromm will remind them that Davidson does not accept roommate preferences based on race, ethnicity, and religion. Davidson's care in matching pays off. " By Christmas last year, we had only four requests for roommate changes out of 480 students. " No one knows whether computer-matching works as well. But at Emory, so far, student reaction seems to be telling something: the online system is overwhelmed with clicks.

单选题A great number of houses would have to be removed to Umake way for/U the new amusement park.

单选题The fire ______ two persons' property.

单选题He had little idea that it was getting so late, ______?A. didn't heB. wasn't itC. did heD. was it

单选题Julia Roberts was engaged to Keifer Sutherland in 1991. Three days before the wedding, she changed her mind and canceled everything.

单选题He is not under arrest,______any restriction on him.(北京大学2008年试题)

单选题The old gentleman is said ______ a very rich man when he was young. A. to have been B. having been C. to be D. to have being

单选题The principal and most obvious contrast between the last two centuries has been the rapid rise of______ linguistics, as opposed to ______ linguistics.

单选题The passage tells us that the best time for a child to learn languages is ______.

单选题The difference in labor incomes is most obvious between ______.

单选题The professor found no student in the lecture hall when he arrived. Only then did he realize that he came ______ early.

单选题My friend Mike was shaking his head in disbelief. " That young woman who just waited on me, " he said, pointing to an employee of the fast food restaurant where we were eating, " had to call someone over to help her count the change. The cash register(出纳机)showed her I need 99 cents, but she couldn't figure out how to count out the coins. " I understood Mike's concern. What we have done in this country, although unintentionally, is to create several generations of individuals most of whom have no idea how to reason, how to do simple math, how to do research, or finally how to be creative. The reason for this is our overuse of information technology: video games, television, digital watches, calculators, and computers. Information technology feeds us information without requiring us to think about it and let us perform operations without understanding them. It is time for us to take a hard look at an educational system that only teaches our children how to push buttons. Our kids can't tell time if the clock has hands. They can use calculators, but cannot add, subtract, divide or multiply. Video games have taken the place of active, imaginative play. Although most of them are technically literate, they choose not to read. They are so used to television and movies that they cannot use their imagination to stay interested in a book. It is not enough to recognize the problem. What we need is solution. The one I offer is simple to suggest, but may be impossible to carry out. We must unplug our children . If we don't, they will never learn how to solve problems. They will never learn basic reasoning skills and will certainly not develop creativity. Instead of filling classrooms with electronics, let's concentrate on good old - fashioned literacy—reading books. Students must be taught not only to perform computer operations, but to figure and reason for themselves. They must see how things work and how process leads to results, they must also stretch their imagination.

单选题Every time a person eats something he makes a nutritional decision. He accepts or rejects the food available to him at home for meals or snacks. Or he selects food for himself at many places in the community, such as supermarkets, drive-ins, restaurants, and food counters in drugstores. These selections make a difference in how an individual looks, how he feels, and how well he can work and play. When a good assortment of food in appropriate amounts is selected and eaten, the consequences are more likely to be a desirable level of health and enough energy to allow one to be as active as one needs and wants to be. When choices are less than desirable, the consequences are likely to be poor health or limited energy or both. Studies of diets of individuals in the United States show that food selection is a highly individual matter, even among young children. Furthermore, far too many individuals of all ages are making poor choices day after day and are either now living with the consequences or will be in the future. Nutritionists and workers in allied professions have been concerned about helping people learn to select and enjoy a wide variety of food combinations that can add up to a good diet. Most people believe that they are well fed—that the choices they make are good ones. After all, they are not really sick, neither are they hungry. However, their nutrition is usually poor in one respect or another. Milk and milk products, such as cheeses, ice cream or milk, buttermilk, and yogurt, are often slighted. Then people may skip many fruits and vegetables, particularly those that are good sources of vitamins A and C. These include dark green leafy vegetables, deep yellow vegetables, and citrus fruits and vegetables, such as cabbage, tomatoes, and green peppers. Every American has the right to choose to be uniformed about nutrition as well as to be informed. If a person believes that she is well fed, attitudes, habits, and information cannot be forced upon her. There are life situations, however, that tend to cause all individuals to want to know how to make the best choices. For example, a young couple is starting a family and must prepare food for young children.

单选题Man: You are looking a little overwhelmed. Man: Exactly, you know. I got a million things to do, and all of them have to be finished within three hours. Question: What does the woman mean? A. She's proud of being able to do many things at the same time. B. She is sure to finish all the things in a few hours. C. She dreams of becoming a millionaire someday. D. She's been kept extremely busy.

单选题Charlene, 16-year-old student at a high school, found herself faced with a maths test to which she knew none of the answers. Rather than fail, she took the test out with her and filled in the answers with the help of her friends. During a break, she got back into the classroom without being seen, crumpled (揉皱) the test with her shoe, and left it lying on the floor. The teacher thought it had been dropped when the tests were collected; she corrected it, and Charlene received a B. Cheating is, of course, nothing new. But today, educators are finding that cheating on the part of students has become more frequent than in the past. Whether it is copying a friend"s homework, using a prepared sheet on an exam, stealing advance copies of a final, writing down rules in one"s hand, or paying someone else to write a term paper, cheating appears to have gained acceptance among a growing number of students between 13 and 19. In a 1978 study of cheating at twenty-two high schools in Georgia, it was found that cheating was common among good and poor students alike—although both boys and girls said they thought boys cheated more. Why is student on the rise? No one really knows. Some blame cheating on a general loss of good values among today"s youth. They point to facts showing increased damage of public things and school stealing and think that reports, such as Watergate (水门事件), have disappointed youth about the honesty of people in higher position. Others think that today"s youth are far more practical than their forefathers (先辈). In the late sixties and early seventies, students were filled with imaginations about changing the world, but today"s students feel great stress to succeed.