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

单选题These are defensive behavior patterns which derive from our fears.

单选题Crystal Ear One day a friend asked my wife Jill if I wanted a hearing aid. "He certainly does," replied Jill. After hearing about a remarkable new product, Jill finally got up the nerve to ask me if I"d ever thought about getting a hearing aid. "No way," I said. "It would make me look 20 years older. No, no," she replied. "This is entirely different. It"s Crystal Ear!" Jill was right. Crystal Ear is different—not the old-styled body worn or over-the-ear aid, but an advanced personal sound system so small that it"s like contacts (隐形眼镜) for your ears. And Crystal Ear is super-sensitive and powerful, too. You will hear sounds your ears have been missing for years. Crystal Ear will make speech louder, and the sound is pure and natural. I couldn"t believe how tiny it is. It is smaller than the tip of my little finger and it"s almost invisible when worn. There are no wires, no behind-the-ear device. Put it in your ear and its ready-to-wear mold (形状) fits comfortably. Since it"s not too loud or too tight, you may even forget that you"re wearing it! Use it at work or at play. And if your hearing problem is worse in certain situations, use Crystal Ear only when you need it. Hearing loss, which occurs typically prior to teenage years, progresses throughout one"s lifetime. Although hearing loss is now the world"s number one health problem, nearly 90 percent of people suffering heating loss choose to leave the problem untreated. For many millions, treating hearing loss in a conventional way can involve numerous office visits, expensive testing and adjustments to fit your ear. Thanks to Crystal Ear, the "sound solution" is now convenient. Almost 90 percent of people with mild hearing loss, and millions more with just a little hearing drop-off (下降), can be dramatically helped with Crystal Ear. Moreover, its superior design is energy-efficient, so batteries can last months. Crystal Ear is now available to help these people treat their hearing loss with a small hearing amplifier(放大器).

单选题 Common-cold Sense You can't beat it, but you don't have to join it. Maybe it got the name "common cold" because it's more common in winter. The fact is, though, being cold doesn't have anything to do with getting one. Colds are caused by the spread of rhinoviruses, and, at least so far, medical science is better at telling you how to avoid getting one than how to get rid of one. Children are the most common way cold viruses are spread to adults, because they have more colds than adults—an average of about eight per year. Why do kids seem so much more easily to get colds than their parents? Simple. They haven't had the opportunity to become immune to many cold viruses. There are more than 150 different cold viruses, and you never have the same one twice. Being infected by one makes you immune to it—but only it. Colds are usually spread by direct contact, not sneezing or coughing. From another person's hand to your hand and then to your nose or eyes is the most common route. The highest concentration of cold viruses anywhere is found under the thumbnails of a boy, although the viruses can survive for hours on skin or other smooth surfaces. Hygiene is your best defense. Wash your hands frequently, preferably with a disinfectant soap, especially when children in your household have colds. But even careful hygiene won't ward off every cold. So, what works when a coughing, sneezing, runny nose strikes? The old prescription of two aspirins, lots of water, and bed rest is a good place to start. But you'll also find some of the folk remedies worth trying. Hot mixtures of sugar (or honey), lemon, and water have real benefits.

单选题Dried Foods Centuries ago, man discovered that removing moisture (51) food helped to preserve it, and that the easiest way to do this was to expose the food to the sun and wind. In this (52) the North American Indians produce dried meat and make it into cakes, the Scandinavians make (53) fish and the Arabs make dried dates. All foods contain (54) , cabbage and other leaf vegetables contain as much as 93% water, potatoes and other root vegetables 80%, lean meat 75%, and fish anything from 80% to 60% depending (55) how fatty it is. If this water is (56) , the activity of the bacteria which causes food to go bad is stopped. Now day most foods are dried mechanically. The most common () of such drying is to put food in chambers. This is the usual method for drying such things (58) vegetables, minced meat, and fish. Liquids such as milk, coffee, tea, soups and eggs may be dried (59) pouring them over a heated horizontal steel cylinder or by spraying them into a chamber through (60) a current of hot air passes. In the first (61) , the dried material is scraped off the roller as a thin film which is then broken up into small pieces, though still relatively coarse flakes. In the second process it fails to the bottom of the chamber as a fine powder. Where (62) pieces of meat and vegetables are required, as in soup, the ingredients are dried separately and then mixed. Dried foods take up less room and weigh less (63) the same food packed in can or frozen, and they are (64) to climbers, explorers and soldiers in battle, who have little storage space. They are also popular with housewives (65) it takes so little time to cook them. Usually it is just a matter of replacing the dried-out moisture with boiling water.

单选题Thirst for Oil Worldwide every day, we devour the energy equivalent of about 200 million barrels of oil. Most of the energy on Earth comes from the Sun. In fact enough energy from the Sun hits the planet's surface each minute to cover our needs for an entire year, we just need to find an efficient way to use it. So far the energy in oil has been cheaper and easier to get at. But as supplies dwindle, this will change, and we will need to cure our addiction to oil. Burning wood satisfied most energy needs until the steam-driven industrial revolution, when energy-dense coal became the fuel of choice. Coal is still used, mostly in power stations, to cover one quarter of our energy needs, but its use has been declining since we started pumping up oil. Coal is the least efficient, unhealthiest and most environmentally damaging fossil fuel, but could make a comeback, as supplies are still ple.ntiful; its reserves are five times larger than oil's. Today petroleum, a mineral oil obtained from below the surface of the Earth and used to produce petrol, diesel oil and various other chemical substances, provides around 40% of the world's energy needs, mostly fuelling automobiles. The US consumes a quarter of all oil, and generates a similar proportion of greenhouse gas emissions. The majority of oil Comes from the Middle East, which has half of known reserves. But other significant sources include Russia, North America, Norway, Venezuela and the North Sea. Alaska's Arctic National Wildlife Refuge could be a major new US source, to reduce reliance on foreign imports. Most experts predict we will exhaust easily accessible reserves within 50 years, though opinions and estimates vary. We could fast reach an energy crisis in the next few decades, when demand exceeds supply. As conventional reserves become more difficult to access, others such as oil shales and tar sands may be used instead. Petrol could also be obtained from coal. Since we started using fossil fuels, we have released 400 billion tons of carbon, and burning the entire reserves could eventually raise world temperatures by 13~C. Among other horrors, this would result in the destruction of all rainforests and tile inching of all Arctic ice.

单选题There are fossil remains of dinosaurs In the rocky strata of every continent.

单选题We"ve been through some rough times together.

单选题A New Cause of Suffering A conference on obesity (肥胖症) was recently held in Vienna. Two thousand experts from more than fifty countries attended the conference. According to statistics, 1.2 billion people worldwide are overweight, and 250 million are too fat. Obesity is rapidly becoming a new cause of suffering. Professor Friedrich hopichler of Salzberg said: "we are living in the new age but with the metabolism (新陈代谢) of a stone-age man. I have just been to the United States. It is really terrible. A pizza (比萨饼) shop is appearing on every corner. We have been occupied by fast food and Coca-Cola-ization." Many of the experts stressed that obesity was a potential killer. Hopichler said: "Eighty percent of all diabetics (糖尿病人) are too fat, also fifty percent of all patients with high blood pressure and fifty percent with fatty tissue complaints. Ten percent more weight means thirteen percent more risk of heart disease. Reducing one"s weight by ten percent leads to thirteen percent lower blood pressure." Another expert Hermann Toplak said that the state health services should improve their financing of preventive programs. "The health insurance pays for surgery (such as reducing the size of the stomach) when the body-mass index (身体质量指数) is more than 40. That is equivalent to a weight of 116 kilograms for a height of 1.60 meters. One should start earlier." Toplak said that prevention should begin in school. "Child obesity has a close relation with the time which children spend in front of TV sets."

单选题 Where Have All the Bees Gone? Scientists who study insects have a real mystery on their hands. All across the country, honeybees are leaving their hives and never returning. Researchers call this phenomenon Colony Collapse Disorder. According to surveys of beekeepers across the country, 25 to 40 percent of the honeybees in the United States have vanished from their hives since last fall. So far, no one can explain why. Colony collapse is a serious concern because bees play an important role in the production of about one-third of the foods we eat. As they feed, honeybees spread pollen from flower to flower. Without this process, a plant can't produce seeds or fruits. Now, a group of scientists and beekeepers have teamed up to try to figure out what's causing the alarming collapse of so many colonies. By sharing their expertise in honeybee behavior, health, and nutrition, team members hope to find out what's contributing to the decline and to prevent bee disappearance in the future. It could be that disease is causing the disappearance of the bees. To explore that possibility, Jay Evans, a researcher at the United States Department of Agriculture (USDA) Bee Research Laboratory, examines bees taken from colonies that are collapsing. "We know what a healthy bee should look like on the inside, and we can look for physical signs of disease," he says. And bees from collapsing colonies don't look very healthy. "Their stomachs are worn down, compared to the stomachs of healthy bees," Evans says. It may be that a parasite is damaging the bees digestive organs. Their immune systems may not be working as they should. Moreover, they have high levels of bacteria inside their bodies. Another cause of Colony Collapse Disorder may be certain chemicals that farmers apply to kill unwanted insects on crops, says Jerry Hayes, chief bee inspector for the Florida Department of Agriculture. Some studies, he says, suggest that a certain type of insecticide affects the honeybee's nervous system (which includes the brain) and memory. "It seems like honeybees are going out and getting confused about where to go and what to do," he says. If it turns out that a disease is contributing to colony collapse, bees, genes could explain why some colonies have collapsed and others have not. In any group of bees there are many different kinds of genes. The more different genes a group has, the higher the group's genetic diversity. So far scientists haven't determined the role of genetic diversity in colony collapse, but it's a promising theory, says Evans.

单选题I want to provide my boys with a decent education.

单选题 The Case of the Disappearing Fingerprints One useful anti-cancer drug can effectively erase the whorls (螺纹) and other characteristic marks that give people their distinctive fingerprints. Losing {{U}} {{U}} 1 {{/U}} {{/U}}could become troublesome. A case released online in a letter by Annals of Oncology indicates how big a {{U}} {{U}} 2 {{/U}} {{/U}}of losing fingerprints is. Eng-HuatTan, a Singapore-based medical doctor describes a 62-year-old man who has used capecitabine to {{U}} {{U}} 3 {{/U}} {{/U}}his nasopharyngeal cancer. After three years on the {{U}} {{U}} 4 {{/U}} {{/U}}, the patient decided to visit U.S. relatives last December. But he was stopped by U.S. Customs officials {{U}} {{U}} 5 {{/U}} {{/U}}4 hours after entering the country when those officials couldn't get fingerprints from the man. There were no distinctive swirly {{U}} {{U}} 6 {{/U}} {{/U}}appearing from his index finger. U.S. Customs has been fingerprinting incoming foreign visitors for years, Tan says. Their index fingers are {{U}} {{U}} 7 {{/U}} {{/U}}and screened against digital files of the fingerprints of bad guys—terrorists and potential criminals that our federal guardians have been tasked with keeping out of the country. Unfortunately, for the Singaporean traveler, one potential {{U}} {{U}} 8 {{/U}} {{/U}}effect of his drug treatment is a smoothing of the tissue on the finger pads. {{U}} {{U}} 9 {{/U}} {{/U}}, no fingerprints. "It is uncertain when fingerprint loss will {{U}} {{U}} 10 {{/U}} {{/U}}to take place in patients who are taking capecitabine," Tan points out. So he cautions any physicians who {{U}} {{U}} 11 {{/U}} {{/U}}the drug to provide their patients with a doctor's note pointing out that their medicine may cause fingerprints to disappear. Eventually, the Singapore traveler made it into the United States. I guess the name on his passport didn't raise any red flags. But he's also now got the explanatory doctor's note—and won't leave home {{U}} {{U}} 12 {{/U}} {{/U}}it. By the way, maybe the Food and Drug Administration, {{U}} {{U}} 13 {{/U}} {{/U}}approved use of the drug 11 years ago, should consider {{U}} {{U}} 14 {{/U}} {{/U}}its list of side effects associated with this medicine. The current list does note that patients may experience vomiting, stomach pain and some other side effects. But no where {{U}} {{U}} 15 {{/U}} {{/U}}it mention the potential for loss of fingerprints.

单选题The city has decided to do away with all the old buildings in its center.

单选题What has happened to aspirin since new painkillers came on the market?

单选题When a person should be considered dead is currently a matter

单选题下面有3篇短文，每篇短文后有5道题。请根据短文回答其后面的问题，为每题确定一个最佳答案。 {{B}}第一篇{{/B}} Be Aware: Teenage Driver A recent study, published in last week's Journal of American Medical Association, offers a picture of how risky it is to get a lift from a teenage driver. Indeed, a 16-year-old driver with three or more passengers is three times as likely to have a fatal accident as a teenager driving alone, by contrast, the risk of death for drivers between 30 and 59 decreases with each additional passenger. The author also found that the death rates for teenager drivers increased dramatically after 10 pm, and especially after midnight. With passengers in the car, the driver was even more likely to die in a late-night accident. Robert Foss, a scientist at the University of North Carolina Highway Stately Research Center, says the higher death rates for teenage drivers have less to do with "really stupid behavior" than with just a lack of driving experience. "The basic issue," he says, "is that adults who are responsible for issuing licenses fail to recognize how complex and skilled a task driving is. " Both he and the author of the study believe that the way to mitigate(使……缓解) the problem is to have states institute so-called graduated licensing systems, in which getting a license is a multistage process. A graduated license requires that a teenager first prove himself capable of driving in the presence of an adult, followed by a period of driving with passenger restrictions, before graduating to full driving privileges. Graduate licensing systems have reduced teenage driver crashes, according to recent studies. About half of the states now have some sort of graduated licensing system in place, but only 10 of those states have restrictions on passengers. California is the strictest, with a novice(新手) driver prohibited from carrying any passenger under 20 ( without the presence of an adult over 25 ) for the first six months.

单选题This poem {{U}}depicts{{/U}} the beautiful scenery of a town in the south.

单选题He"s spent years cultivating knowledge of art.

单选题Theseprogrammes are of immense value to old people.

单选题Be {{U}}suspicious{{/U}} about water from other sources, such as ponds, streams, wells, tanks, water trucks or public standpipes.