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。{{B}}第一篇{{/B}} {{B}} Famous American Foods{{/B}} What, besides children, connects mothers around the world and across the seas of time? It's chicken soup, one prominent American food expert says. From Russian villages to Africa and Asia, chicken soup has been the remedy for those weak in body and spirit. Mothers passed their knowledge on to ancient writers of Greece, China and Rome, and even 12th century philosopher and physician Moses Maimonides extolled (赞美)its virtues. Among the ancients, Aristotle thought poultry should stand in higher estimation than four-legged animals because the air is less dense than the earth. Chickens got another boost (吹捧)in the Book of Genesis, where it is written that birds and fish were created on the fifth day, a day before four-legged animals. But according to Mimi Sheraton, who has spent much of the past three years exploring the world of chicken soup, much of the reason for chicken's real or imagined curative (治愈的)powers comes from its color. Her new book, "The Whole World Loves Chicken Soup", looks at the beloved and mysterious brew, with dozens of recipes from around the world. Throughout the ages, she said, "There has been a lot of feeling that white-colored foods are easier to eat for the weak woman and the ill". In addition, "soups, or anything for that matter eaten with a spoon" are considered "comfort foods" Sheraton said. "I love soup and love making soup and as I was collecting recipes I began to see this as an international dish. It has a universal mystique as something curative, a strength builder," Sheraton said from her New York home. Her book treats the oldest remedy as if it was brand new. The National Broiler Council, the trade group representing the chicken industry, reported that 51 percent of the people it surveyed said they bought chicken because it was healthier, 50 percent said it was versatile, 41 percent said it was economical and 46 percent said it was low in fat.

单选题A small number of firms have ceased trading.

单选题Last week, I called on my teacher.

单选题{{B}}第二篇{{/B}} Pushbike Peril Low speed bicycle crashes can badly injure or even kill children if they fall onto the ends of the handlebars (车把) so a team of engineers is redesigning the humble handlebar in a bid to make it safer. Kristy Arbogast, a bioengineer at the Children's Hospital of Philadelphia in Pennsylvania, began the project with her colleagues after a study of serious abdominal(腹部的) injuries in children in the past 30 years showed that more than a third were caused by bicycle accidents. "the task was to identify how the injuries occurred and come up with some countermeasures(对策). " she says. By interviewing the children and their parents, Arbogast and her team were able to reconstruct(重建; 重构) many of the accidents and identified a common mechanism responsible for serious injures. They discovered that most occur when children hit an obstacle at a slow speed, causing them to topple over. To maintain their balance they turn the handlebars through 90 degrees — but their momentum (冲力) forces them into the end of the handlebars The bike then falls over and the other end of the handlebars hits the ground, ramming it into their abdomen. The solution the group came up with is a handgrip(握柄) fitted with a spring and damping(制动的; 减速的，缓冲的) system. The spring absorbs up to 50 per cent of the forces transmitted through the handlebars in an impact, The group hopes to commercialize(使商品化) the device, which should add only a few dollars to the cost of a bike. "But our task has been one of education because up until now, bicycle manufacturer were unaware of the problem," says Arbogast. The team has also approached the US Consumer Product Safety Commission to try to persuade manufacturers to adopt the new design. A decision is expected later this year.

单选题She will be pleased to meet you.

单选题The {{U}}caliber{{/U}} of F. Scott Fitzgerald's writing was reassessed by literary critics in the 1950's.

单选题Sending E-mails to Professors One student skipped class and then sent the professor an e-mail (1) for copies of her teaching notes. Another (2) that she was late for a Monday class because she was recovering from drinking too much at a wild weekend party. At colleges and universities in the US, e-mail has made professors more approachable (平易近人). But many say it has made them too accessible, (3) boundaries that traditionally kept students at a healthy distance. These days, professors say, students seem to view them as available (4) the clock, sending a steady stream of informal e-mails. "The tone that they take in e-mails is pretty astounding (令人吃惊的) ," said Michael Kessler, an assistant dean at Georgetown University. "They'll (5) you to help: 'I need to know this. '" "There's a fine (6) between meeting their needs and at the same time maintaining a level of legitimacy (正统性) as an (7) who is in charge. " Christopher Dede, a professor at the Harvard Graduate School of Education, said (8) show that students no longer defer to (听众) their professors, perhaps because they realize that professors' (9) could rapidly become outdated. "The deference was driven by the (10) that professors were all-knowing sources of deep knowledge," Dede said, and that notion has (11) . For junior faculty members, e-mails bring new tension into their work, some say, as they struggle with how to (12) . Their job prospects, they realize, may rest in part on student evaluations of their accessibility. College students say e-mail makes (13) easier to ask questions and helps them learn. But they seem unaware that what they write in e-mails could have negative effects (14) them, said Alexandra Lahav, an associate professor of Law at the University of Connecticut. She recalled an e-mail message from a student saying that he planned to miss class so he could play with his son. Professor Lahav did not respond. "Such e-mails can have consequences," she said. "Students don't understand that (15) they say in e-mail can make them seem unprofessional, and could result in a bad recommendation. /

单选题Effects of Environmental Pollution If pollution continues to increase at the present rate, formation of aerosols (浮质) in the atmosphere will cause the onset (开始) of an ice age in about fifty year's time. This conclusion reached by Dr S. I. Rasoo1 and Dr S. H. Scheider of the United States Goddard Space Flight Center, answer the apparently conflicting questions of whether an increase in the carbon dioxide (二氧化碳) content of the atmosphere will cause the Earth warm up or increasing the aerosol question is dominant. Two specters haunting conservationists have been the prospect that environmental pollution might lead to the planet's becoming unbearably hot or cold. One of these ghosts has now been laid, because it seems that even an increase in the amount of carbon dioxide in the atmosphere to eight times its present value will produce an increase in temperature of only 2℃, which would take place over several thousand years. But the other problem now looms larger than ever. Aerosols are collection of small liquid or solid particles dispersed in air or some other medium. The particles are all so tiny that each is composed of only a few hundred atoms. Because of this they can float in the air for a very long time. Perhaps the most commonly experienced aerosol is industrial smog (烟雾) of the kind that plagued London in the 1950s and is an even greater problem in Los Angeles today. These collections of aerosols reflect the Sun's heat and thereby cause the Earth to cool. Dr Rasoo1 and Dr Schneider have calculated the exact effect of a dust aerosol layer just above the Earth's surface in the temperature of the planet. As the layer builds up, the present delicate balance between the amount of heat absorbed from the Sun and the amount radiated from the Earth is disturbed. The aerosol layer not only reflects much of the Sun's light but also transmits the infrared (红外线) radiation from below. So, while the heat input to surface drops, the loss of heat remains high until the planet cools to a new balanced state. Within fifty years, if no steps are taken to stop the spread of aerosols in the atmosphere, a cooling of the Earth by as much as 3.5~C seems inevitable. If that lasts for only a few years it would start another ice age, and because the growing ice caps at each pole would themselves reflect much of the Sun's radiation it would probably continue to develop even if the aerosol layer were destroyed. The only bright spot in this gloomy forecast lies in the hope expressed by Dr Rasoo1 and Dr Schneider that nuclear powder may replace fossil fuels in time to prevent the aerosol content of atmosphere from becoming critical.

单选题The offender will be sentenced to life imprisonment.

单选题He {{U}}replied{{/U}} that this was absolutely impossible.

单选题Some species of bacteria and fungi thrive on simple compounds such as alcohol.

单选题The curious looks from the strangers around her made her feel {{U}}uneasy{{/U}}.

单选题They have the (capability) to destroy the enemy in a fewdays.

单选题The indecisive man was readily persuaded to change his mind again.

单选题We should give our guests some art crafts authentically Chinese so that they could better understand Chinese culture.______

单选题This is not typical of English,but is a feature of the Chinese language.

单选题It takes about an hour to get there, allowing for possible traffic delays.A. attendingB. taking account ofC. in the charge ofD. taking charge of

单选题We will abide by their decision.______

单选题Our company is collaborating with a Japanese firm in designing a new computer.A. mergingB. allocatingC. communicatingD. cooperating