单选题It was an exceptionally hot day for the time of year. A. a totally B. an unusually C. a fully D. an absolutely

单选题We consume a lot more than we are able to produce.

单选题 下面有3篇短文，每篇短文后有5道题，每题后面有4个选项。请仔细阅读短文并根据短文回答其后面的问题，从4个选项中选择1个最佳答案。{{B}}第一篇{{/B}} {{B}}An Unusual Experience at Sea{{/B}} It was early one morning in February 1972 when Mayoral and his partner Santos Luis Perez set out to fish in Laguna San lgnacio. Hundreds of gray whales were swimming in the three-mile-long, one-mile-wide inlet. This was usual between December and April, for the whales breed in the protected inlets of Baja, the final destination of their annual 6,000-mile migration from the Arctic. Mayoral and Perez stayed as for as possible from the spouting (喷涌) creatures, because the whales were said to smash boats with their powerful flukes (鲸尾的叶). Mayoral, who had 16 years' experience at sea, knew no one who had been close to a healthy gray whale and lived. As Mayoral rowed to catch the outgoing (退出去的) tide, he saw, straight ahead, a whale approaching. Heart pounding, the 31-year-old turned the little wooden boat and pulled hard for shore. Try as he might, however, he could not row over the huge beast. In moments, it overtook them. Expecting the worst, the fishermen dropped to their knees and made the sign of the cross. The whale raised its nine-foot head out of the water and looked at them. Then, remarkably, it began to rub gently against the boat. Sinking and resurfacing(重新露出水面) on opposite sides of the boat, the whale continued its gentle rubbing for almost an hour. At first the men prayed, frozen in fear. But gradually Mayoral 's terror gave way to curiosity. He was tempted to reach out and touch this oddly unthreatening monster, but a lifetime of caution kept him still. At last, having finished with whatever its purpose had been, the whale disappeared below the surface. Some time passed before either man spoke. Then they headed home. To his wife, Mayoral said only, "No fish today." But word spread through the cluster of small wooden houses near the salt-water lake. A strange thing had happened: one of the whales had tried to touch the men, and the men had returned unharmed. Why? In nights to come, by faint kerosene lamps, Mayoral and Perez told the story. They and other fishermen struggled to understand. What did the whale want?

单选题Because administering the whole company, he sometimes has to work around the clock.

单选题Among all the essays, his was {{U}}picked{{/U}} out as the best one by the professors.

单选题A man's skin is thicker than a woman's and not nearly as soft. The thickness prevents the sun's radiation from getting through, which is why men wrinkle less than women do. Women have a thin layer of fat just under the skin and there is a plus to this greater fat reserve. It acts as an invisible fur coat to keep a women warmer in the winter. Women also stay cooler in summer. The fat layer helps isolate them from heat. Men wrinkle less than women becauseA. men's skin is thicker and contains less fat.B. men's skin is thicker but contains more fat.C. men's skin is softer than women's.D. men's skin is too thick to wrinkl

单选题The chemical is deadly to rats but safe to cattle. A. fatal B. hateful C. good D. useful

单选题The phrase "wary of" in paragraph 8 could be best replaced by

单选题Take some Uspare/U clothes in case you get wet.

单选题 The Old Gate In the Middle Ages the vast majority of European cities bad walls around them. This was partly for defensive {{U}} {{U}} 1 {{/U}} {{/U}}but another factor was the need to keep out anyone regarded as undesirable, like people with contagious {{U}} {{U}} 2 {{/U}} {{/U}}. The Old City of London gates were all {{U}} {{U}} 3 {{/U}} {{/U}}by the end of the 18th century. The last of London's gates was removed a century ago, but by a {{U}} {{U}} 4 {{/U}} {{/U}}of luck, it was never destroyed. This gate is, in {{U}} {{U}} 5 {{/U}} {{/U}}fact, not called a gate at all; its name is Temple Bar, and it marked the {{U}} {{U}} 6 {{/U}} {{/U}}between the Old City of London and Westminster. In 1878 the Council of London took the Bar down, numbered the stones and put the gate in {{U}} {{U}} 7 {{/U}} {{/U}}because its design was {{U}} {{U}} 8 {{/U}} {{/U}}it was expensive to {{U}} {{U}} 9 {{/U}} {{/U}}and it was blocking the traffic. The Temple Bar Trust was {{U}} {{U}} 10 {{/U}} {{/U}}in the 1970's with the intention of returning the gate home. The aim of the trust is the {{U}} {{U}} 11 {{/U}} {{/U}}of the nation's architectural heritage. Transporting the gate will mean physically pulling it {{U}} {{U}} 12 {{/U}} {{/U}}, stone by stone, removing and rebuilding it near St Paul's Cathedral. Most of the facade of the gate will probably be {{U}} {{U}} 13 {{/U}} {{/U}}, though there is a good {{U}} {{U}} 14 {{/U}} {{/U}}that the basic structure will be sound. The hardest {{U}} {{U}} 15 {{/U}} {{/U}}of all, however, will be to recreate the statues of the monarchs that once stood on top of the gate.

单选题We can not {{U}}go on{{/U}} quarrelling like this.

单选题The Beginning of American Literature American has always been a land of beginnings. After Europeans‘iscovered’ America in the fifteenth century, the mysterious New World became for many people a genuine hope of a new life, an escape from poverty and persecution, a chance to start again. We can say that, as nation, America begins with that hope. When, however, does American literature begin? American literature begins with American experiences. Long before the first colonists arrived, before Christopher Columbus, before the Northmen who 'found' America about the year 1,000, Native Americans lived here. Each tribe's literature was tightly woven into the fabric of daily life and reflected the unmistakably American experience of lining with the land. Another kind of experience, one filled with fear and excitement, found its expression in the reports that Columbus and other explorers sent home in Spain, France and England. In addition, the journals of the people who lived and died in the New England wilderness tell unforgettable tales of hard and sometimes heartbreaking experiences of those early years. Experience, then, is the key to early American literature. The New World provided a great variety of experiences, and these experiences demanded a wide variety of expressions by an even wider variety of early American writers. These writers included John Smith, who spent only two-and a half years on the American continent. They included Jonathan Edwards and William Byrd, who thought of themselves as British subjects, never suspecting a revolution that would create a United States of America with a literature of its own. American Indians, explorers, Puritan ministers, frontier wives, plantation owner-they are all the creators of the first American literature.

单选题She was close to success.

单选题{{B}}第三篇{{/B}} {{B}}Light Night, Dark Stars{{/B}} Thousands of people around the globe step outside to gaze at their night sky. On a clear night, with no clouds, moonlight, or artificial lights to block the view. people can see more than 14,000 stars in the sky, says Dennis Ward. an astronomer with the University Corporation for Atmospheric Research (UCAR) in Boulder. Colo. But when people are surrounded by city lights, he says, they're lucky to see ISO stars. If you've ever driven toward a big city at night and seen its glow from a great distance, you've witnessed fight pollution. It occurs when light from streetlights, office buildings, signs, and other sources streams into space and illuminates the night sky. This haze of light makes many stars invisible to people on Earth. Even at night, big cities like New York glow from light pollution, making stargazing difficult. Dust and particles of pollution from factories and industries worsen the effects of light pollution. "If one city has a lot more light pollution than another." Ward says, "that city will suffer the effects of light pollution on a much greater scale." Hazy skies also make it far more difficult for astronomers to do their jobs. Cities are getting larger. Suburbs are growing in once dark. rural areas. Light from all this new development is increasingly obscuring the faint light given off by distant stars. And if scientists can't locate these objects, they can't learn more about them. Light pollution doesn't only affect star visibility. It can harm wildlife too. It's clear that artificial light can attract animals, making them go off course. There's increasing evidence, for example, that migrating birds use sunsets and sunrises to help find their way, says Sydney Gauthreaux Jr., a scientist at Clemson University in South Carolina. "When light occurs at night," he says, "it has a very disruptive influence." Sometimes birds fly into lighted towers, high-rises, and cables from radio and television towers. Experts estimate that millions of birds die this way every year.

单选题When does the next train depart? A. pull up B. pull down C. pull out D. pull in

单选题The Television Camera The television camera is rather like the human eye. Both the eye and the camera have a lens, and both produce a picture on a screen. In each case the picture is made up of millions of spots of light. Let us see how the eye works. When we look at an object-a person, a house, or whatever it may be, we do not see all the details of the object in one piece. We imagine that we do, but this is not the case. In fact, the eye builds up the picture for us in our brain, which controls our sight, in millions of separate parts, and although we do not realize it, all these details are seen separately. This is what happens when we look at something. Beams of light of different degrees of intensity, re-fleeted from all parts of the object, strike the lens of the eye. The lens then gathers together the spots of light from these beams and focuses them on to a light-sensitive plate-the retina-at the back of the eyeball. In this way, an image of the object is produced on the retina in the form of a pattern of lights. The retina contains millions of minute light-sensitive elements, each of which is separately connected to the brain by a tiny fiber in the optic nerve. These nerve fibers, working independently, pick out minute details from the image on the retina and torn the small spots of light into nerve impulses of different strengths. They then transmit these impulses to the brain. They do this all at the same time. All the details of the image are fed to the brain, and as we have taught our brain to add them together correctly, we see a clear picture of the object as a whole. Television, which means vision at a distance, operates on a similar principle. A television picture is built up in thousands of separate parts. Beams of light reflect from the subject being televised strike the lens of the television camera, which corresponds to the lens of the eye. The camera lens gathers together the spots of light from these beams and focuses an image of the subject on to a plate, the surface of which is coated with millions of photo-electric elements sensitive to light. The spots of light forming the image on the plate cannot be transmitted as light. So they are temporarily converted by an electronic device into millions of electrical impulses ; that is, into charges of electricity. These electrical impulses are then sent through space on a wireless wave to the homes of the viewers. They are picked up by the aerials and conveyed to the receivers to the television set. There, they are finally converted back into the spots of light that make up the picture on the television screen.

单选题Cell Phones: Hang Up or Keep Talking? Millions of people are using cell phones today. In many places it is actually considered unusual not to use one. In many countries, cell phones are very popular with young people. They find that the phones are more than a means of communication--having a mobile phone shows that they are cool and connected. The explosions around the world in mobile phone use make some health professionals worried. Some doctors are concerned that in the future many people may suffer health problems from the use of mobile phones. In England, there has been a serious debate about this issue. Mobile phone companies are worried about the negative publicity of such ideas. They say that there is no proof that mobile phones are bad for your health. On the other hand, why do some medical studies show changes in the brain cells of some people who use mobile phones? Signs of change in the tissues of the brain and head can be detected with modern scanning(扫描)equipment. In one case, a traveling salesman had to retire at a young age because of serious memory loss. He couldn't remember even simple tasks. He would often forget the name of his own son. This man used to talk on his mobile phone for about six hours a day, every day of his working week, for a couple of years. His family doctor blamed his mobile phone use, but his employer's doctor didn't agree. What is it that makes mobile phones potentially harmful? The answer is radiation. High-tech machines can detect very small amounts of radiation from mobile phones. Mobile phone companies agree that there is some radiation, but they say the amount is too small to worry about. As the discussion about their safety continues, it appears that it's best to use mobile phones less often. Use your regular phone if you want to talk for a long time. Use your mobile phone only when you really need it. Mobile phones can be very useful and convenient, especially in emergencies. In the future, mobile phones may have a warning label that says they are bad for your health. So for now, it's wise not to use your mobile phone too often.

单选题2. Finding Yourself without GPS As more mobile phones tap into the Internet, people increasingly turn to them for location-centric services like getting directions and finding nearby restaurants. While Global Positioning System (GPS) technology provides excellent accuracy, only a fraction of phones have this capability. What's more, GPS coverage is spotty in dense urban environments, and in—phone receivers can be slow and drain a phone's battery. To sidestep this problem, last week Google added a new feature, called My Location, to its Web-based mapping service. My Location collects information from the nearest cell-phone tower to estimate a person's location within a distance of about 1,000 meters. This resolution is obviously not sufficient for driving directions, but it can be fine for searching for a restaurant or a store. "A common use of Google Maps is to search nearby," says Steve Lee, product manager for Google Maps, who likened the approach to searching for something within an urban zip code, but without knowing that code. "In a new city, you might not know the zip code, or even if you know it, it takes time to enter it and then to zoom in and pan around the map." Many phones support software that is able to read the unique identification of a cell-phone tower and the coverage area that surrounds it is usually split into three regions. Lee explains that My Location uses such software to learn which tower is serving the phone—and which coverage area the cell phone is operating in. Google also uses data from cell phones in the area that do have GPS to help estimate the locations of the devices without it. In this way, Google adds geographic information to the cell—phone tower's identifiers that the company stores in a database. As the database grows, says Lee, the service will become more accurate. It will never be as accurate as GPS, but he expects that it could eventually find a person within a couple hundred meters.

单选题we packed up the things we had accumulated(积累)over tlle last three years aild {{U }}left{{/U }}．

单选题Marxism doctrine was {{U}}spelled out{{/U}} in the Communist Manifesto.