单选题While attempting to find a new route to India, Columbus discovered America by accident. A. sailing B. failing C. trying D. hoping

单选题下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。 {{B}}Debate over the Use of Renewable Energy{{/B}} Ausubel of Rockefeller University in New York, US says the key renewable (可再生的) energy sources, including sun, wind and biofuels, would all require vast amounts of land if developed up to large scale production - unlike nuclear power. That land would be far better{{U}} (51) {{/U}}alone, he says. Renewables look{{U}} (52) {{/U}}when they are quite small. But if we start producing renewable energy on a large{{U}} (53) {{/U}}, the fallout (结果) is going to be horrible. Ausubel draws his conclusions by analysing the amount of energy that renewables, natural gas and nuclei (原子核) can{{U}} (54) {{/U}}in terms of power per square metre of land used. Moreover, he claims that{{U}} (55) {{/U}}renewable energy use increases, this measure of efficiency will decrease as the best land for wind, biofuels, and solar power gets used up. Solar power is much more{{U}} (56) {{/U}}than biofuel in terms of the area of land used, but it would still{{U}} (57) {{/U}}150 square kilometres of photovoltaic (光电的) cells to match the energy production of the 1000 MW nuclear plant. In another example, he says{{U}} (58) {{/U}}the 2005 US electricity demand via wind power alone would need 780,000 square kilometres, an area the{{U}} (59) {{/U}}of Texas. However, several experts are highly critical of Ausubel's{{U}} (60) {{/U}}. John Turner of the US government's National Renewable Energy Laboratory says that even if the US got all of its{{U}} (61) {{/U}}from solar energy, it would still need less than half the amount of land that has been paved over{{U}} (62) {{/U}}highways. Further, it need not{{U}} (63) {{/U}}up additional land. The US could get a quarter of its energy just from covering rooftops of existing buildings, he says. According to Turner, the same "dual use" also{{U}} (64) {{/U}}to wind power. "The footprint for wind is only 5% of the land that it{{U}} (65) {{/U}}. Farmers can still farm the land that the turbines are on." Turner says looking solely at land use is an oversimplification of the issue.

单选题Plagiarize Last fall Susan Youngwood, a journalism instructor at St. Michael' College, phoned the offices of Columbia Journalism Review ( CJR) to pose a question. For an exercise in covering speeches, she had asked her students to listen to John F. Kennedy's inaugural address and write a story about it. The sixteen students, mostly sophomores, complied with the assignment. However, two students, acting independently, took a short cut, plagiarized New York Times' account of Kennedy's speech, and submitted the Times's words as their own. The students received an F for the course, the maximum penalty the journalism department demands. But Youngwood wanted more. She wanted examples that told her students why plagiarism was bad, and looked to C JR for guidance. "I was curious about what happens on a professional level," she said. "If I am caught plagiarizing, what happens?" Her question was interesting. But the answers, like so many, are not a crisp black or white. Their tones of gray mirror the inconsistency with which society treats dozens of other offenses. To be sure, most writers and editors still regard plagiarism as a journalistic evil—the profession's cardinal sin. "This is something you never, never do", says James Fallows, Washington editor of The Atlantic Monthly. Every line of work needs clear rules. If you are a soldier, you don't desert. If you are a writer, you don't steal anyone's prose. It should be the one automatic firing. But it is not. Punishment is uneven, ranging from severe to virtually nothing even for major offenses. Some editors will keep a plagiarist on staff or will knowingly hire one if talent outweighs the wrong doing. If convinced Watergate burglar G. Gordon Liddy can become a talk show host with a hand of admiring followers and Richard Nixon can go to his grave a respected elder statesman, it's hardly surprising the journalists who commit plagiarism can continue their careers at the same publication or move on to some loftier endeavor.

单选题How do you account for your absence from the class last Thursday?

单选题He finally decided to reject this proposal.A. supportB. acceptC. opposeD. receive

单选题It is postulated that population trends have an effect on economic fluctuations. A. challenged B. assumed C. accepted D. doubted

单选题The Best Way to Reduce Your Weight You hear this: "No wonder you are fat. All you ever do is eat." You feel sad: "I skip my breakfast and supper. I run every morning and evening. What else can I do?" Basically you can do nothing. Your genes, not your life habits, determine your weight, and your body constantly tries to maintain it. Albert Stunkard of the University of Pennsylvania found from experiments that, "80 percent of the children of two obese parents become obese, as compared with no more than 14 percent of the offspring of two parents of normal weight." How can obese people become normal or even thin through dieting? Well, dieting can be effective, but the health costs are tremendous. Jules Hirsch, a research physician at Rockefeller University, did a study of eight fat people. They were given a liquid formula providing 600 calories a day. After more than 10 weeks, the subjects lost 45 kg on average. But after leaving the hospital, they all regained. The results were surprising: by metabolic measurement, fat people who lost large amounts of weight seemed like they were starving. They had psychiatric problems. They dreamed of food or breaking their diet. They were anxious and depressed; some were suicidal. They hid food in their rooms. Researchers warn that it is possible that weight reduction doesn"t result in normal weight, but in an abnormal state resembling that of starved non-obese people. Thin people, however, suffer from the opposite: They have to make a great effort to gain weight. Ethan Sims, of the University of Vermont, got prisoners to volunteer to gain weight. In four to six months, they ate as much as they could. They succeeded in increasing their weight by 20 to 25 percent. But months after the study ended, they were back to normal weight and stayed there. This did not mean that people are completely without hope in controlling their weight. It means that those who tend to be fat will have to constantly battle their genetic inheritance if they want to significantly lower their weight. The findings also provide evidence for something scientists thought was true—each person has a comfortable weight range. The range might be as much as 9 kg. Someone might weigh 60-69 kg without too much effort. But going above or below the natural weight range is difficult. The body resists by feeling hungry or full and changing the metabolism to push the weight back to the range it seeks.

单选题China to Help Europe Develop GPS (全球定位系统) Rival China is to contribute to a new global satellite navigation system being developed by European nations. The Galileo satellite system (51) a more accurate civilian alternative to the Global Positioning System (GPS), operated by the US military. China will provide 230m Euros (USD 259m) in (52) and will cooperate with technical, manufacturing and market development." China will help Galileo to (53) the major world infrastructure (基础设施)for the growing market for location services," said Loyola de Palacio, EU transport commissioner. A new center that will coordinate co-operation was also announced (54) the European Commission, the European Space Agency (ESA) and the Chinese Ministry of Science and Technology not long (55) . The China-Europe Global Navigation Satellite System Technical Training and Cooperation Center will be (56) at Beijing University. China has a substantial satellite launch industry and could potentially help launch the Galileo satellites. The US has claimed that Galileo could interfere (57) the US ability to downgrade (降级) the GPS service during military conflicts. European officials say this is unfounded and counter that US opposition (58) the commercial challenge Galileo would present to GPS. Galileo will be precise to within a meter, while the civilian GPS service is accurate to around 10 meters. The Galileo satellite constellation (卫星群集) will (59) 27 operational and three reserve satellites orbiting the Earth at an altitude of 23,600 km. The satellites will be strung along three medium-Earth orbits at 56 degrees inclination to the equator and will provide global coverage. The system should be operational by 2008 and the entire project is expected to (60) around 3.2 billion Euros (USD 3.6 billion). The European Commission has said Galileo will primarily be used for transportation technology, scientific research, land management and disaster monitoring. Galileo will provide two signals; a standard civilian one and an encrypted (编码) , wide-band signal (61) the Public Regulated Service (PRS). This second signal is designed to withstand localized jamming(干扰)and will be used by police and military services in Europe. European Commission (62) have said China will not be given access to the PRS. The first Galileo satellite is scheduled to launch late in 2004. Clocks on board the (63) will be synchronized (使同步) through 20 ground sensors stations, two command centers and 15 uplink (向上传输) stations. Receivers on the ground will use time signals from the satellites to precisely calculate their (64) . A "search and rescue" function will also (65) distress signals be relayed through the constellation of satellites.

单选题I want to provide my boys with a {{U}}decent{{/U}} education. A. special B. private C. general D. good

单选题 阅读下面这篇短文，短文后列出了7个句子，请根据短文的内容对每个句子做出判断。如果该句提供的是正确信息，请选A；如果该句提供的是错误信息，请选B；如果该句的信息文章中没有提及，请选C。 {{B}}Mother Nature Shows Her Strength{{/B}} Tornadoes (龙卷风) and heavy thunderstorms moved across the Great Lakes and into Trumbull County on Saturday evening. The storms were dramatic and dangerous. George Snyder was driving the fire truck down Route 88 when he first noticed that a funnel (漏斗状的) cloud was behind him. "I stopped the truck and watched the funnel cloud. It was about 100 feet off the ground and I saw it go up and down for a while. It was moving toward Bradley Road and then suddenly it disappeared," Snyder said. Snyder only saw one of the funnel clouds that passed through northeastern Ohio on Saturday. In Trumbull County, a tornado turned trees onto their sides. Some trees fell onto houses and cars. Other trees fell into telephone and electrical wires as they went down. Amanda Symcheck was having a party when the storm began. "1 knew something was wrong," she said. "I saw the sky go green and pink (粉红色). Then it sounded like a train rushing toward the house. I started crying and told everyone to go to the basement for protection." The tornado caused a lot of damage to cars and houses in the area. It will take a long time and much money to repair everything. There was also serious water damage from the thunderstorms. The heavy rains and high wind caused the power to go out in many homes. The storms caused serious flooding in areas near the river. More than four inches of rain fell in parts of Trumbull County. The river was so high that the water ran into streets and houses. Many streets had to be closed to cars and trucks because of the high water. This made it difficult for fire trucks, police cars, and other rescue vehicles to help people who were in trouble. Many people who live near the river had to leave their homes for their own safety. Some people reported five feet of water in their homes. Local and state officials opened emergency shelters for the people who were evacuated (撤走). The Red Cross served meals to them. "This was a really intense storm," said Snyder. "People were afraid. Mother Nature can be fierce. We were lucky this time. No one was killed."

单选题A great deal has been done to {{U}}remedy{{/U}} the situation. A.maintain B.improve C.assess D.protect

单选题Techniques to employ the energy of the sun are being developed.

单选题After the accident, my back Uwas very painful/U for a long time.

单选题How Animals Keep Warm Man has invented ways to keep warm, but how do animals defend themselves? They cannot reason in the sense that man can, but nature has taken care of the animal kingdom by providing animals with special instincts (本能). One of these instincts is known as hibernation (冬眠). "Sleeping like a dormouse (榛睡鼠)" is not only a common saying but is a reality. When winter comes, the dormouse and other hibernating animals have reached a well- nourished state. They eat very well in warmer days laying down fat in the tissues of their bodies and during hibernation this keeps them alive. Safe in their nests, or burrows (地洞), they sleep soundly until the warmth of spring arrives. Bats, tortoises, snakes, frogs, even insects like butterflies, hibernate more or less completely. Some, like the squirrels (松鼠), sleep during coldest weather but are roused (弄醒) by a warm spell (暖流). During hibernation, the temperature of an animal's body drops drastically. Breathing and heart-beats almost cease. Another instinctive method of avoiding intense cold is to escape by means of migration. Wild swans, seagulls, swallows and cuckoos are a few of the very many kinds of birds which fly thousands of miles, twice a year, to avoid cold. Many animals, especially those of the Arctic regions, have summer and winter quarters. The Arctic deer of North America, as well as the reindeer (驯鹿) of Europe, move southward towards the forests when winter approaches. They return to the northern area when the warmth of spring begins to be sensed. There are animals which do not attempt to leave at the first sign of winter cold. Their instinctive means of defense is to dig out a deep burrow, made it soft and warm by padding (填塞) out with straw, leaves, moss and fur. In it they have a "secret place" containing food which they hope will last the winter through! Animals which fall into this class include the Arctic fox, the rabbit and the little field-mouse.

单选题The teacher asked us to submit the reports before next Monday.A. hand inB. hand outC. hand onD. hand back

单选题Far too many owners of electric appliances have a hard time ______ qualified repairmen to fix their machines.A. findingB. to findC. to findingD. find

单选题The workers in that factory Umanufacture/U furniture.

单选题Thousands of people {{U}}perished{{/U}} in the storm. A.died B.suffered C.floated D.scattered

单选题He made a number of rude Uremarks/U about the food.

单选题The service industry is relying more and more on female work force.