单选题The government has {{U}}put forward{{/U}} new proposals to tackle the problem of increasing crime.

单选题 Sonic Device The other day, Dr. Robert Smith, who is blind, took a remarkable stroll through the campus of the University of California at Santa Barbara. As Dr. Smith walked along the campus, places and impediments (障碍物) in his path seemed to call out their names to him, "library here, library here", "bench here, bench here". Dr. Smith was testing a prototype (样机) navigation system for the blind that announced the surrounding objects through stereo headphones that were mounted to a computer in his back-pack (背包), creating virtual reality landscape (仿真景象). The information came not from some miniature radar but from the signals broadcast by the military's network of global positioning satellites (全球定位卫星). One day, its developers hope, miniaturized (小型化的) versions of this navigation device, which now weighs 28 pounds, will help the blind navigate unfamiliar neighborhoods. "With this system you do not need to know a thing in advance about where you are going," said Dr. Roberta Klatzky, a psychologist at Carnegie Mellon University who is working with Dr. Smith to develop the navigating device. Dr. Michael Oberdor of the National Eye Institute said, "A blind person could walk down the street and know not just that he was at 80th and Broadway, but what stores are around, and that Zabar's delicatessen (熟食店) was up ahead. This navigation system tells you not just where there are obstacles, but your overall location geographically." It lets blind users construct a mental map of new surroundings and learn their way around. The navigation system uses signals from a computerized map to create a "virtual acoustic display (仿真声音显示)". This is a talking map in which large objects seem to announce themselves in the headphones with the precise timing and loudness that would be the case if the objects were actually making a sound. This allows the blind person to sense immediately his or her distance or direction, and use that information for guidance. While no one knows whether it is because blind people tend to develop a sharper sense of hearing. Those who have tried the system say that they quickly adapt to locating an object through the sounds. "One of the crucial features of this system is that it takes advantage of sensory psychophysics (感官心理物理学)—how the brain interprets signals from outside to make a map of your surroundings so you can navigate," Dr. Oberdor said.

单选题{{B}}第二篇{{/B}} {{B}} The Development of PR{{/B}} The rise of multinational corporations, global marketing, new communications technologies, and shrinking cultural differences have led to an unparalleled increase in global public relations or PR. Surprisingly, since modern PR was largely an American invention, the U. S. leadership in public relations is being threatened by PR efforts in other countries. Ten years age, for example, the world’s top five public relations agencies were American-owned. In 1991, only one was. The British in particular are becoming more sophisticated and creative. A recent survey found that more than half of all British companies include PR as part of their corporate planning activities, compared to about one-third of U. S. companies. It may not belong before London replaces New York as the capital of PR. Why is America lagging behind in the global PR race? Firstly, Americans as a whole tend to be fairly provincial and take more of an interest in local affairs. Knowledge of world geography, for example, has never been strong in this country. Secondly, American lag behind their European and Asian counterparts in knowing a second language. Less than 5 percent of Bur son-Marshall’s U.S. employees know two languages. Ogilvy and Mather has about the same percentage. Conversely, some European firms have half or more of their employees fluent in a second language. Finally, people involved in PR abroad tend to keep a closer eye on international affairs. In the financial PR area, for instance, most Americans read the Wall Street Journal. Overseas, their counterparts read the Journal as well as the Financial Times of London and The Economist, publications not often read in this country. Perhaps the PR industry might take a lesson from Ted Turner of CNN (Cable News Network). Turner recently announced that the word “foreign” would no longer be used on CNN news broadcasts. According to Turner, global communications have made the nations of the world so interdependent that there is no longer any such thing as foreign.

单选题The dentist has decided to extract her bad tooth. A．take out B．repair C．push in D．dig

单选题What does the writer want to tell in the passage?

单选题The attitude of the author towards the research project is

单选题第二篇 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 percent 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New Product Will Save lives Drinking water that looks clean may still contain bugs (虫子), which can cause illness. A small company called Genera Technologies has produced a testing method in three stages, which shows whether water is safe. The new test shows if water needs chemicals added to it, to destroy anything harmful. It was invented by scientist Dr. Adrian Parton, who started Genera five years ago. He and his employees have developed the test together with a British water company. Andy Headland, Genera's marketing director, recently presented the test at a conference in the USA and forecast good American sales for it. Genera has already sold 11 of its tests at $42,500 a time in the UK and has a further four on order. It expects to sell another 25 tests before the end of March. The company says it is the only test in the UK to be approved by the government. Genera was formed five years ago and until October last year had only five employees; it now employs 14. Mr Headland believes that the company should make around $19 million by the end of the year in the UK alone.

单选题I don't feel secure when I am alone in the house.A. safeB. prettyC. distantD. obvious

单选题I did not realize the actual seriousness of the environmental problem.A. extremeB. generalC. detailedD. practical

单选题______ more time, my paper would have been better.A. to giveB. if givingC. givenD. giving

单选题By referring to computers and other inventions, the author means to say that future achievements in technology will bring about inconceivable dramatic changes.

单选题Mary is looking for the book she lost yesterday. A. trying to find B. trying to read C. trying to buy D. trying to borrow

单选题During the Second World War, all important resources in the U.S. were allocated by the federal government.A. distributedB. nationalizedC. commandeeredD. taxed

单选题Save Energy At Home On the average, Americans waste as much energy as two-thirds of the world"s population consumes. That"s largely the 1 of driving inefficient cars, using inefficient appliances (设备), and living and working in poorly insulated (隔热) buildings. Then what can you do to 2 the situation? Buy energy-efficient products—buy new appliances or electronics of the highest energy-efficiency rating. New energy-efficient models may cost more initially but have a lower operating 3 over their lifetimes, The most energy-efficient models 4 the Energy Star label, which identifies products 5 use 20-40 percent less energy than standard new products. According to the EPA (美国环境保护署), the typical American household can save about $400 per year in 6 bills with products that carry the Energy Star. Switch to compact fluorescent bulbs (荧光灯)—change the three bulbs you use 7 in your house to compact fluorescents. Each compact fluorescent bulb will keep half a ton of CO 2 out of the air 8 its lifetime, 9 , compact fluorescent bulbs last ten times as long and can save $30 per year in electricity costs. Set heating and cooling temperatures correctly-check thermostats (温度自动调节器) in your home to make sure they are 10 at a level that doesn"t waste energy. Turn off the lights—turn off lights and other electrical appliances such as televisions and radios when you"re not 11 them. Install automatic timers for lights that people in your house frequently 12 to turn them off when leaving a room. Let the sun shine in—the cheapest and most energy-efficient light and heat source is often right outside your window. On 13 days, open blinds (百叶窗) to let the sun light your home for free. Also remember that 14 entering a room equals passive solar heating. Even on cold winter days, sun streaming into a room can raise the temperature by several

单选题The Stock Exchange is in {{U}}turmoil{{/U}} following a huge wave of selling.

单选题The Sea What do you know about the sea? We know that it looks very pretty when the sun is shining on it. We also know that it can be very rough when there is a strong wind. What other things do we know about it? The first thing—to remember is that the sea is very big. When you look at the map of the world you will find there is more water than land. The sea covers three quarters of the world. The sea is also very deep in some places. It is not deep everywhere. Some parts of the sea are very shallow. But in some places the depth of the sea is very great. There is one spot, near Japan, where the sea is nearly 11 kilometres deep! The highest mountain in the world is about 9 kilometres high. If that mountain were put into the sea at that place, there would be 2 kilometres of water above it! What a deep place! If you have swum in the sea, you know that it is salty. You can taste the salt. Rivers, which flow into the sea, carry salt from the land into the sea. Some parts of the sea are more salty than other parts. There is one sea, called the Dead Sea, which is very salty. It is so salty that swimmers cannot sink! Fish cannot live in the Dead Sea! In most parts of the sea, there are plenty of fishes and plants. Some live near the top of the sea. Others live deep down. There are also millions of tiny living things that float in the sea. These floating things are so small that it is hard to see them. Many fish live by eating these. The sea can be very cold. Divers, who go deep down in the sea, know this. On the top the water may be warm. When the diver goes downwards, the sea becomes colder and colder. Another thing happens. When the diver goes deeper, the water above presses down on him. It squeezes him. Then the diver has to wear clothes made of metal. But he cannot go very deep. Some people who wanted to go very deep used a very strong diving ship! They went down to the deepest part of the sea in it. They went down to a depth of eleven kilometres!

单选题The police refused to disclose the clues they were working on.

单选题Our lives are intimately bound up with theirs.

单选题I am in favor of his plan because it is reasonable.A. reiectB. acceptC. chooseD. support