单选题The city has decided to do away with all the old buildings in its center. A. get rid of B. set up C. repair D. paint

单选题The union representative put across her argument very effectively.

单选题The report advocated setting up day training colleges. A. supposed B. excited C. Suggested D. discussed

单选题His sole motive was to make her happy. A. aim B. argument C. capability D. pursuit

单选题Some People Do Not Taste Salt Like Others Low-salt foods may be harder for some people to like than others, according to a study by a Penn State College of Agricultural Sciences food scientist. The research indicates that genetic factors influence some of the difference in the levels of salt we like to eat. Those conclusions are important because recent, well-publicized efforts to reduce the salt content in food have left many people struggling to accept fare that simply does not taste as good to them as it does to others, pointed out John Hayes, assistant professor of food science, who was lead investigator on the study. Diets high in salt Can increase the risk of high blood pressure and stroke. That is why public health experts and food companies are working together on ways to help consumers lower salt intake through foods that are enjoyable to eat. This study increases understanding of salt preference and consumption. The research involved 87 carefully screened participants who sampled salty foods such as soup and chips, on multiple occasions, spread out over weeks. Test subjects were 45 men and 42 women, reportedly healthy, ranging in age from 20 to 40 years. The sample was composed of individuals who were not actively modifying their dietary intake and did not smoke cigarettes. They rated the intensity of taste on a commonly used scientific scale, ranging from barely detectable to strongest sensation of any kind. "Most of us like the taste of salt. However, some individuals eat more salt, both because they like the taste of saltiness more, and also because it is needed to block other unpleasant tastes in food," said Hayes. "Supertasters, people who experience tastes more intensely, consume more salt than non-tasters do. Snack foods have saltiness as their primary flavor, and at least for these foods, more is better, so the supertasters seem to like them more." However, supertasters also need higher levels of salt to block unpleasant bitter tastes in foods such as cheese, Hayes noted. "For example, cheese is a wonderful blend of dairy flavors from fermented milk, but also bitter tastes from ripening that are blocked by salt," he said. "A supertaster finds low-salt cheese unpleasant because the bitterness is too pronounced." Hayes cited research done more than 75 years ago by a chemist named Fox and a geneticist named Blakeslee, showing that individuals differ in their ability to taste certain chemicals. As a result, Hayes explained, we know that a wide range in taste acuity exists, and this variation is as normal as variations in eye and hair color. "Some people, called supertasters, describe bitter compounds as being extremely bitter, while others, called non-tasters, find these same bitter compounds to be tasteless or only weakly bitter." he said. "Response to bitter compounds is one of many ways to identify biological differences in food preference because supertasting is not limited to bitterness.

单选题If you are in the street when an earthquake occurs, stay in a large open space

单选题 Earthquake How does an earthquake start2 What makes an earthquake happen? The rock of the earth's crust (地壳) may have a fault, a kind of break in the surface. The blocks which make up the earth move, and sometimes this may cause the sides of the fault to move up and down or lengthways (纵向地) against each other. When one piece of rock starts to rub on another with great force, a lot of energy is used. This energy is changed into vibrations (震动) and it is these vibrations that we reef as an earthquake. The vibrations can travel thousands of kilometers and so an earthquake in Turkey may be felt in Greece. What to do during an earthquake? At school As soon as the earthquake starts, students should get under the desks immediately and wait until the teacher tells them it is safe to come out. The teacher should, at the same time, go immediately to the teacher's desk, get underneath (在……下面) it and stay there till the danger is over. Students must not argue with the teacher or question instructions. As soon as the tremors (震动) stop, all students should walk towards the exit and go straight to the school playground or any open space such as a square or a park. They must wait there until the teacher tells them it is safe to go. At home If you are at home when the earthquake occurs, get immediately under the table in the living room or kitchen. Choose the biggest and strongest table you can find. You must not go anywhere near the window and don't go out onto the balcony (阳台). Once the tremors have stopped, you can come out from under the table but you must leave the building straight away. You should walk down the stairs and should not use the lift-there may be a power cut as a result of the earthquake and you could find yourself trapped inside the lift for hours. In the street If you are in the street when the earthquake takes place, do not stand near buildings, fences or walls—move away as quickly as possible arid try to find a large open space to wait in. Standing under trees could also be dangerous.

单选题The conference Uexplored/U the possibility of closer trade links.

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 CO2 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 (112) 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 (15) .

单选题阅读下面这篇短文，短文后列出7个句子，请根据短文的内容对每个句子做出判断。 Winners and Losers Why are the biggest winners in the past decade of trade globalization mostly in South and East Asia, whereas the biggest losers are mostly in the former Soviet bloc (集团) and sub-Saharan Africa? History is a partial guide: East Asia has a long trading tradition, Lately reinvigorated (给以新的活力) by the Chinese adoption of market economics. The Soviet Union, on the other hand, was sheltered from free-market forces for more than 70 years. In Africa, some countries are disadvantaged because of inadequate infrastructure (基础结构); many countries have little to trade hut commodities, the prices of which have fallen in recent years. In some regions, certain countries have suffered by adopting misguided policies, often under pressure from International Monetary Fund. First among these is Russia, which in the early 1990s tried to embrace capitalism before first building the institutions that make capitalism work, such as an independent bank system, a system of business law, and an adequate method for collecting taxes. Encouraged by the IMF, the World Bank and the U. S. Department of the Treasury, President Boris Yeltsin’s regime privatized the state-owned industrial sector, creating a class of oligarchs (寡头政治集团成员), who, knowing how unstable conditions were at home, sent their money abroad instead of investing it at home. In contrast, China, the biggest winner from globalization, did not follow the IMF formula. Of the former states of the Soviet bloc, only a few, notably Poland and Hungary, managed to grow, which they did by ignoring IMF advice and adopting expansionary plans, including spending more than they collected in taxes. Botswana and Uganda are also success stories: despite their disadvantages, their countries achieved vigorous growth by creating stable civil societies, liberalizing trade and implementing reforms that ran counter to IMF prescriptions.

单选题More Than a Ride to School The National Education Association claims, "The school bus is a mirror of the community. " They further add that, unfortunately, what appears on the exterior does not always reflect the reality of a chosen community. They are right—sometimes it reflects more! Just ask Liesl Denson. Riding the school bus has been more than a ride to school for Liesl. Bruce Hardy, school bus driver for Althouse Bus Company has been Liesl's bus driver since kindergarten. Last year when Liesl's family moved to Parkesburg, knowing her bus went by her new residence, she requested to ride the same bus. This year Liesl is a senior and will enjoy her last year riding the bus. She says, "It's been a great ride so far! My bus driver is so cool and has always been a good friend and a good listener. Sometimes when you're a child adults do not think that what you have to say is important. Mr. Hardy always listens to what you have to say and makes you feel important. " Her friends Ashley Batista and Amanda Wolfe agree. Bruce Hardy has been making Octorara students feel special since 1975. This year he will celebrate 30 years working for Althouse Bus Company. Larry Althouse, president of the company, acknowledges Bruce Hardy's outstanding record. "You do not come by employees like Bruce these days. He has never missed a day of work and has a perfect driving record. He was recognized in 2000 by the Pennsylvania School Bus Association for driving 350,000 accident free miles. Hardy's reputation is made further evident through the relationships he has made with the students that ride his bus. " Althouse further adds, "Althouse Bus Company was established 70 years ago and has been providing quality transportation ever since. My grandfather started the business with one bus. Althouse Bus Company is delighted to have the opportunity to bring distinctive and safe service to our local school and community and looks forward to continuing to provide quality service for many more years to come. " Three generations of business is not all the company has enjoyed. Thanks to drivers like Bruce Hardy, they have been building relationships through generations. Liesl's mother Carol also enjoys fond memories of riding Bruce Hardy's bus to the Octorara School District.

单选题I propose that we discuss this at the next meeting.

单选题阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。 {{B}}Car Thieves Could Be Stopped Remotely{{/B}} Speeding off in a stolen car, the thief thinks he has got a great catch. But he is in a nasty surprise. The car is fitted with a remote immobilizer, and a radio signal from a control center miles away will ensure that once the thief switches the engine {{U}}(51) {{/U}}, he will not be able to start it again. For now, such devices {{U}}(52) {{/U}}only available for fleets of trucks and specialist vehicles used on construction sites. But remote immobilization technology could soon start to trickle down to ordinary cars, and {{U}}(53) {{/U}} be available to ordinary cars in the UK {{U}}(54) {{/U}}two months. The idea goes like this. A control box fitted to the car incorporates {{U}}(55) {{/U}} miniature cellphone, a microprocessor and memory, and a GPS satellite positioning receiver. {{U}}(56) {{/U}}the car is stolen, a coded cellphone signal will tell the unit to block the vehicle's engine management system and prevent the engine {{U}}(57) {{/U}}restarted. There are even plans for immobilizers {{U}}(58) {{/U}}shut down vehicles on the move, though there are fears over the safety implications of such a system. In the UK, an array of technical fixes is already making {{U}}(59) {{/U}}harder for car thieves. "The pattern of vehicles crime has changed," says Martyn Randall of Thatcham, a security research organization based in Berkshire that is funded in part {{U}}(60) {{/U}}the motor insurance industry. He says it would only take him a few minutes to {{U}}(61) {{/U}}a novice how to steal a car, using a bare minimum of tools. But only if the car is more than 10 years old. Modern cars are a far tougher proposition, as their engine management computer will not {{U}}(62) {{/U}} them to start unless they receive a unique ID code beamed out by the ignition key. In the UK, technologies like this {{U}}(63) {{/U}} achieve a 31 per cent drop in vehicle-related crime since 1997. But determined criminals are still managing to find other ways to steal cars. Often by getting hold of the owner's keys in a burglary. In 2000, 12 per cent of vehicles stolen in the UK were taken by using the owner's keys, which doubles the previous year's figure. Remote-controlled immobilization system would{{U}} (64) {{/U}}a major new obstacle in the criminal's way by making such thefts pointless. A group that includes Thatcham, the police, insurance companies and security technology firms have developed standards for a system that could go on the market sooner than the {{U}}(65) {{/U}}expects.

单选题There are only five minutes left, but the outcome of the match is still in doubt

单选题{{U}}In short{{/U}}, I am going to live there myself.

单选题Our aim was to Uupdate/U the health service and we succeeded.

单选题A Phone That Knows You"re Busy It"s a modern problem: you"re too busy to be disturbed by incessant (连续不断的) phone calls so you turn your cellphone off. But if you don"t remember to turn it back on when you"re less busy, you could miss some important calls. If only the phone knew when it was wise to interrupt you, you wouldn"t have to turn it off at all. Instead, it could let calls through when you are not too busy. A bunch of behavior sensors (传感器) and a clever piece of software could do just that, by analyzing your behavior to determine if it"s a good time to interrupt you. If built into a phone, the system may decide you"re too busy and ask the caller to leave a message or ring back later. James Fogarty and Scott Hudson at Camegie Mellon University in Pennsylvania based their system on tiny microphones, cameras and touch sensors that reveal body language and activity. First they had to study different behaviors to find out which ones strongly predict whether your mind is interrupted. The potential "busyness" signals they focused on included whether the office doors were left open or closed, the time of day, if other people were with the person in question, how close they were to each other, and whether or not the computer was in use. The sensors monitored these and many other factors while four subjects were at work. At random intervals, the subjects rated how interruptible they were on a scale ranging from "highly interruptible" to "highly not-interruptible". Their ratings were then correlated with the various behaviors. "It is a shotgun (随意的) approach: we used all the indicators we could think of and then let statistics find out which were important," says Hudson. The model showed that using the keyboard, and talking on a landline or to someone else in the office correlated most strongly with how interruptible the subjects judged themselves to be. Interestingly, the computer was actually better than people at predicting when someone was too busy to be interrupted. The computer got it right 82 per cent of the time, humans 77 per cent. Fogarty speculates that this might be because people doing the interrupting are inevitably biased towards delivering their message, whereas computers don"t care. The first application for Hudson and Fogarty"s system is likely to be in an instant messaging system, followed by office phones and cellphones. "There is no technological roadblock (障碍) to it being deployed in a couple of years," says Hudson.

单选题Keep on Fighting Turning once again to the question of invasion, I would observe that there has never been a period in all these long centuries of which we boast when an absolute guarantee against invasion, still less against serious raids, could have been given to our people. In the days of Napoleon the same wind which would have carried his transports across the Channel might have driven away the blockading (封锁) fleet. There was always the chance, and it is that chance which has excited and befooled (愚弄) the imaginations of many continental tyrants. Many are the tales that are told. We are assured that novel methods will be adopted, and when we see the originality of malice (怨恨), the ingenuity of aggression, which our enemy displays, we may certainly prepare ourselves for every kind of novel stratagem (战略) and every kind of brutal and treacherous (奸诈的) maneuver (花招). I think that no idea is so outlandish (古怪的) that it should not be considered and viewed with a searching, but at the same time, I hope, with a steady eye. We must never forget the solid assurances of sea power and those which belong to air power if it can be locally exercised. At any rate, that is what we are going to try to do. This is the resolve of His Majesty"s government—every man of them. This is the will of parliament and the nation. The British Empire and the French republic, linked together in their cause and in their need, will defend to the death their native soil, aiding each other like good comrades to the utmost of their strength. Even though large tracts of Europe and many old and famous states have fallen or may fall into the grip of the Gestapo and all the odious (可憎的) apparatus of Nazi rule, we shall not flag (变弱) or fail. We shall go on to the end, we shall fight in France, we shall fight on the seas and oceans, we shall fight with growing confidence and growing strength in the air, we shall defend our island, whatever the cost might be, we shall fight on the beaches, we shall fight on the landing grounds, we shall fight in the fields and in the streets, we shall fight in the hills, we shall never surrender, and even if, which I do not for a moment believe, this island or a large part of it were subjugated (征服) and starving, then our empire beyond the seas, armed and guarded by the British fleet, would carry on the struggle, until, in God"s good time, the new world, with its power and might, steps forth to the rescue and the liberation of the old.

单选题Electronic Spying Wild Bill Donovan would have loved the Internet. The American spymaster who built the Office of Strategic Services in the World War II and later laid the roots for the CIA was fascinated with information. Donovan believed in using whatever tools came to hand in the "great game" of espionage-spying as a "profession. " These days the Net, which has already re-made such everyday pastimes as buying books and sending mail, is reshaping Donovan's vocation as well. The latest revolution isn't simply a matter of gentlemen reading other gentlemen's e-mail. That kind of electronic spying has been going on for decades. In the past three or four years, the World Wide Web has given birth to a whole industry of point-and-click spying. The spooks call it "open-source intelligence," and as the Net grows, it is becoming increasingly influential. In 1995 the CIA held a contest to see who could compile the most data about Burundi. The winner, by a large margin, was a tiny Virginia company called Open-Source Solutions, whose clear advantage was its mastery of the electronic world. Among the firms making the biggest splash in this new world is Straitford, Inc. , a private intelligence-analysis firm based in Austin, Texas. Straitford makes money by selling the results of spying (covering nations from Chile to Russia) to corporations like energy-services firm McDermott International. Many of its predictions are available online at www. straitford, com. Straitford president George Friedman says he sees the online world as a kind of mutually reinforcing tool for both information collection and distribution, a spymaster's dream. Last week his firm was busy vacuuming up data bits from the far corners of the world and predicting a crisis in Ukraine. "As soon as that report runs, we'll suddenly get 500 new Internet sign-ups from Ukraine," says Friedman, a former political science professor. "And we'll hear back from some of them. " Open-source spying does have its risks, of course, since it can be difficult to tell good information from bad. That's where Straitford earns its keep. Friedman relies on a lean staff of 20 in Austin. Several of his staff members have military-intelligence backgrounds. He sees the firm's outsider status as the key to its success. Straitford's briefs don't sound like the usual Washington back-and-forthing, whereby agencies avoid dramatic declarations on the chance they might be wrong. Straitford, says Friedman, takes pride in its independent voice.

单选题This valve regulates the flow of water.