单选题He was kept in appalling conditions in prison.A. necessaryB. terribleC. criticalD. normal

单选题Yet {{U}}in one way{{/U}} they are really so fortunate.

单选题It is virtually impossible to persuade him to apply for the job.

单选题下面有3篇短文，每篇短文后有5道题。请根据短文内容，为每题确定1个最佳选项。{{B}}第一篇{{/B}} How the First Stars in the Universe Came into Existence Researchers believe that our universe began with the Big Bang(宇宙大爆炸)about 13 billion years ago，and that soon after that event，matter began to form as small dust grains and gases．How the first stars formed from this dust and gas has been a burning question for years，but a state of-the-art computer simulation now offers the most detailed picture yet of how these first stars in the universe came into existence． The composition of the early universe was quite different from that of today，and the physics that governed the early universe were also somewhat simpler．Dr．Naoki Yoshida and colleagues in Japan and the U．S．incorporated these conditions of the early universe，sometimes referred to as the“cosmic dark ages，”to simulate the formation of an astronomical object that would eventually shine its light into this darkness． The result is a detailed description of the formation of a protostar(原恒星)-the early stage of a massive primordial(原始的)star of our universe-and the researchers'computer simulation sets the bar for further investigation into the star formation process．The question of how the first stars evolved is so important because their formations and eventual explosions provided the seeds for subsequent stars to come into being． According to their simulation，gravity acted on minute density variations in matter，gases，and the mysterious“dark matter”of the universe after the Big Bang in order to form this early stage of a star-a protostar with a mass of just one percent of our sun．The simulation reveals how pre-stellar(前恒星的) gases would have actually evolved under the simpler physics of the early universe to form this protostar． Dr．Yoshida's simulation also shows that the protostar would likely evolve into a massive star capable of synthesizing(合成)heavy elements，not just in later generations of stars，but soon after the Big Bang． Their simulation of the birth of a protostar in the early universe signifies a key step toward the ambitious goal of piecing together the formation of an entire primordial star and of predicting the mass and properties of these first stars of the universe．More powerful computers，more physical data，and an even larger range will be needed for further calculations and simulations，but these researchers hope to eventually extend this simulation to the point of nuclear reaction initiation-when a stellar(星球的)object be comes a true star．

单选题Hold the torch steady so I can see better. A. continuous B. quick C. finn D. exceptional'

单选题Defined most broadly , folklore includes all the customs, beliefs and traditions that people have handed down from generation to generation.

单选题You must be tired, but try to hang on till all the work"s finished.

单选题She was {{U}}clos{{/U}}e to success．

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}} Save Energy At Home{{/B}} On the average, Americans waste as much energy as two-thirds of the world's population consumes. That's largely the {{U}}(51) {{/U}} 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 {{U}}(52) {{/U}} 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 {{U}}(53) {{/U}} over their lifetimes. The most energy-efficient models {{U}}(54) {{/U}} the Energy Star label, which identifies products {{U}}(55) {{/U}} 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 {{U}}(56) {{/U}} bills with products that carry the Energy Star. Switch to compact fluorescent bulbs (荧光灯) -- Change the three bulbs you use {{U}}(57) {{/U}} in your house to compact fluorescents. Each compact fluorescent bulb will keep half a ton of CO2 out of the air {{U}}(58) {{/U}} its lifetime. {{U}}(59) {{/U}}, 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 (温度自调节器) in your home to make sure they are {{U}}(60) {{/U}} 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 {{U}}(61) {{/U}} them. Install automatic timers for lights that people in your house frequently {{U}}(62) {{/U}} 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 {{U}}(63) {{/U}} days, open blinds (百叶窗) to let the sun light your home for free. Also remember that {{U}}(64) {{/U}} entering a room equals passive solar heating. Even on cold winter days, sun streaming into a room can raise the temperature by several {{U}}(65) {{/U}}.

单选题Youth Emancipation in Spain The Spanish Government is so worried about the number of young adults still living with their parents that it has decided to help them leave the nest. Around 55 percent of people aged 18434 in Spain still sleep in their parents' home,says the latest re- port from the country's state-run Institute of Youth. To coax(劝诱) young people from their homes,the Institute started a "Youth Emancipation(解放)" programme this month. The programme offers guidance in finding rooms and jobs. Economists blame young people's family dependence on the precarious(不稳定的)labour market and increasing housing prices. Housing prices have risen 17 percent a year since 2000. Cultural reasons also contribute to the problem, say sociologists(社会学家). Family ties in south Europe --Italy, Portugal and Greece -- are stronger than those in middle and north Europe, said Spanish soiologist Almudena Moreno Minguez in her report "The Late Emancipation of Spanish Youth. Key for Understanding". "In general, young people in Spain firmly believe in the family as the main body around which their private life is organized," said Minguez. In Spain -- especially in the countryside,it is not uncommon to find entire groups of aunts,uncles, cousins, nieces and nephews(外甥/侄子)all living on the same street. They regularly get together for Sunday dinner. Parents' tolerance is another factor. Spanish parents accept late-night partying and are wary of setting bedtime rules. "A child can arrive home at whatever time he wants. If parents complain he'll put up a fight and call the father a fascist," said José Antonio Gómez Yanez,a sociologist at Carlos Ⅲ University in Madrid. Mothers' willingness to do children's household chores(家务)worsens the problem. Dionisio Masso, a 60-year-old in Madrid, has three children in their 20s. The eldest 28, has a girlfriend and a job. But life with mum is good. "His mum does the wash and cooks for him;in the end,he lives well," Masso said.

单选题I can't put up with my neighbor's noise any longer；it's driving me mad． A．measure B．generate C．tolerate D．reduce

单选题I was astonished at the news of his escape.

单选题If we leave now, we should miss the traffic

单选题He tried to {{U}}assemble{{/U}} his thoughts.

单选题At first glance, a forest appears to be a {{U}}haphazard{{/U}} collection of trees, shrubs, vines, and flowers.

单选题The Vatican is famous for its magnificent church towers.

单选题The proper procedure contributed to the satisfying outcome.A. resultB. assessmentC. estimationD. sources

单选题Taking a Dim View of Solar Energy Despite the bad economy, or maybe because of it, the rooftop-solar industry is booming, as Americans become increasingly intrigued by the idea of turning their roofs into mini power plants and cutting their electric bills. In 2008,33,500 rooftop solar systems were installed in the United States, a 63 percent increase over the amount of capacity installed in 2007. In California. the solar capital of country, the increase was 95 percent. Meanwhile, the outlook for the other side of the solar industry—the large, centralized power plants—isn't so sunny. These megaprojects—acres of desert covered in thousands of solar panels sending electricity—controlled mostly by utility companies that have had a monopoly over the country's electricity grid, were supposed to be the key to the future of the solar industry. So far, they're getting vastly outpaced by the decentralized rooftop approach. According to the Interstate Renewable Energy Council's 2006—08 count, consumers added 522 megawatts to the grid: whereas utility companies added just 96 megawatts. The disparity has utilities worried about loosing their grip on the country's energy industry, and the $130 billion residential electricity market. In some cases, utilities are actually taking direct steps to thwart rooftop solar. "There is a tension between distributed solar generation and utilities," says Adaln Browning, executive director of The Vote Solar initiative, a solar advocacy group in San Francisco. They've had the energy pie to themselves for a century, and now facing a future where clean distributed energy will play a large part, they're looking for ways to profit from it and maintain control. People want solar panels on their roofs, so utilities should be working to make that happen rather than getting in the way. "says Browning. " "It's not hard to understand why a big utility might not like the idea of homes and buildings being covered in solar panels. If every building in America is generating its own solar energy, that throws a big wrench into their business model. But as most states have passed renewable-energy standards recently, mandating that a certain percentage of their energy come from renewable sources, utilities have become reluctant players in the solar game because, frankly, they have no choice. However, thanks to state and federal government subsidies, private sector can seize this opportunity to grow.

单选题The room is dim and quiet. A．tiny B．pleasant C．dark D．agreeable