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The tropical boxfish, roughly the shape of a box, looks like it would have trouble moving through the water1 boxfish is, in fact, an excellent swimmer that cuts through the water extremely smoothly. It is such a good swimmer that engineers at Mercedes Technology Center in Sindelfingen, Germany, had a remarkable 2to use the boxfish to design the shape of a car that can cut through air as efficiently as the boxfish moves through water.A model of the boxfish was created for them by Ronald Fricke at the Rosenstein Museum in Stuttgart, Germany. The model was placed inside a wind tunnel a(n) 3 that is used to study how air moves around solid objects. The boxfish shape reportedly performed over 65 percent better than today's compact cars It should be possible to 4 that efficient shape for use in the body of a car to reduce its air resistance. Less air resistance means less fuel is required to run it.Engineers set to work to try to solve the 5 of how his unlikely shape could be so efficient. Their efforts were successful, and the car they created is the Mercedes Bionic concept car. However,the car is currently just for testing and not for sale.

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In Malaysian Borneo, hotels are involved in a battle with guests over a very smell fruit called the durian. The smell of the durian is hard to describe, and has been compared to rotten fish or a garbage dump. This is why it is 1 for durians to be kept outside the hotel. Hotel staff must 2 keep watch for this food because guests often try to smuggle it in.When the fruit is in season, hotel managers in Kuching must work harder to keep it out. A hotel that smells of durian will find that the number of guests visiting it quickly 3. But since it's not 4 to check every single guest entering the hotel, a certain number of durians inevitably get through. There are several ways to clean a room that has been 5 by a durian's smell. One is charcoal, which absorbs the odor slowly. Another way is to use a machine called an ionizer, which can remove the smell in three hours or less.Its offensive smell 6, the durian is loved by people all over Southeast Asia and is commonly regarded as the"King of Fruits".

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Fifteen years ago, most experts would have agreed that the firstpeople in the Americas arrived by walking across a land bridge thatcrossed the Bering Strait between Siberia and Alaska. They thentraveled south through an open area of ground between great sheetsof ice that 1 across North America at thattime. Today, however, this theory is being challengedAn alternative theory suggests that instead of a single first migration,various groups of people came to the Americas at 2spaced well apart in time. Another theory proposes thatancient people might have 3 their way alongthe shoreline using kayaks, just as adventurous tourists do todayLooking at ancient tools found in America, archeologist DennisStanford noticed that their shape was similar to tools used bythe Solutrean culture of southwestern Europe. He thinks it is4 that people of that culture may havekayaked across the Atlantic from Europe to AmericaThe science of archeology often produces theories that are based onvery small bits of evidence. Today's archeologists know that being5 and holding on to one theory while shuttingout the others isn't good science. As new evidence is discovered that6 existing theories, they adjust those theoriesto explain the new facts.

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Hunting and habitat destruction have forced the roughly 900 remaining mountain gorillas in the Democratic Republic of the Congo to 1 to just a few protected areas. Virunga National Park is one such area. Unfortunately, even there they aren't safe. On July 22, 2007, several people armed with automatic 2 killed a mountain gorilla family in Virunga. The largest male of the family, a 230-kilogram (500-pound) gorilla named Senkwekwe, probably smelled the killers coming near.As he was used to seeing many park visitors, he is unlikely to have een very 3. However, this was the last time he would see a human.The gorillas weren't killed for their meat; their bodies were simply left on the ground. Finding the killers was difficult, as men with guns are a common sight in the country. Fortunately, the person who may have ordered the killings was not able to 4 the police. The chief warden of Virunga National Park at the time of the killings was arrested. The warden was reportedly connected to illegal charcoal production in the park. In Virunga, trees are illegally cut down to produce charcoal, an important and valuable fuel. Park rangers are frequently killed in their efforts to 5 this illegal trade. It is thought that the warden had the gorillas killed to damage the reputation of a ranger who was challenging the charcoal producers.

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Before modern humans, or Homo sapiens, migrated out of Africa perhaps 60,000 years ago, scientists tell us that another group, Neanderthals, had occupied Europe and Asia for 1200,000 years. Although there were probably no more than 15,000 of them at their population's peak, groups of Neanderthals were 2 over a(n) 3 area throughout Europe, into the Middle East, and even as far east as Mongolia.In 1856, the first Neanderthal bones were found in Germany's Neander Valley by workers digging for stones. These thick bones indicated that Neanderthals were shorter than modern humans, but physically stronger. Their tools were rough and simple, and not as refined as those of later Homo sapiens. Additionally, their food was not as varied: the 4 of their diet was the meat of large and medium sized animals. At some point after modern humans entered Europe and Asia, the Neanderthals vanished from Earth. The reason for the disappearance remains a mystery. There are, however, a number or theories. As modern Homo sapiens 5 their lands, they may have killed the Neanderthals off. Other possible causes include diseases introduced by the newcomers, or climate change.Another theory was that the Neanderthals had children with Homo sapiens,and gradually became part of their group. However, 1997 DNA analysis by geneticist Svante Paabo and his colleagues at the University of Munich determined that Neanderthal DNA is not included in the DNA of modern humans. This is rather convincing 6 that the majority of Neanderthals probably died out, and people alive today are not their 7.

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Born in 1935, Christo is one of the best-known livingartists. However, the art he is famous for could never fitnside a museum. He is an"environmental artist" whochanges the look of a place on a very large scale, oftenwith colorful fabric, 1 allowingpeople to look at that place in a new wayChristo worked closely alongside his wife, Jeanne-Claudefrom their marriage in 1958 until her death in 2009Once the couple had settled on an artistic idea, it took anincredible amount of planning, work, and money in orderto turn their 2 into3. Some examples of theirlarge-scale works areSurrounded Islands(1983). Eleven islands in Miamiwere surrounded by 600,000 square meters(6.5 millionsquare feet) of floating pink fabric.The Gates(2005). In New York City's Central Park, 7, 503metal gates with orange fabric 4from them were set up along the park's pathwaysChristos 5 project is calledThe Mastaba, a structure made of over 400,000 oil barrelsbuilt at Al Gharbia, 160 kilometers (100 miles)fromAbu Dhabi.

简答题

Number these events from A to D in the order they happened

简答题

The Boat （填写单词前的字母代码）-Based on those in pre-European 1.( ) America-2.( ) in Spain by Aymara Indians from Bolivia-Made of reeds with no 3.( ) materials-Namedthe Mata Rangi IIIThe Route-Began in Barcelona, Spain-Continued to Morocco- Will go to Cape Verde and across 4.( ) to ColombiaOn the Open Sea-Heavy winds and 5.( ) seas-6.() of the main cabin-Worries of falling and 7.( )-Clouds eventually cleared and boat survivedLessons Learned-Reeds are 8.( ) enough to survive difficuly conditions for long periods of time-9.( )boat not for everyone-Had to fight 10.()and depression

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Photographing CitiesA radical change has happened in photography. The wide availability of smartphones means that ordinary people can now take 1 photographs of the world around them. 2 photographers are 3 with capturing and documenting the world around them, especially the cities in which they live in.When and where a photograph is taken can have a(n) 4 effect on what the viewer feels. To bring a city to life, look for a mid-level view. It's still close enough to feel the experience of the city without looking down on it. In any city, there will be publicly accessible places that let you look into the city. New York City, especially, has a unique geography. Since Manhattan is an island, the city has had to grow tall. That height, surrounded by water with its bridges, makes New York a 5 place to photograph

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Jennifer Holland is a writer who went to Papua New Guinea to do research for an article on birds of paradise. She later shared her experiences there.Jennifer Hollands favorite species of bird of paradise is Carola's parotia. Its dance 1 includes motions such as bowing, flapping, and 2 to move the heavy and 3 wirelike feathers on its head, in hopes of winning one of the watching females. "Its mating dance is so 4 that I could hardly keep from laughing."For a couple of nights, Holland stayed in a tiny village with a local family. It is the custom of the local people to build a fire pit in the center of the room. Because she was not accustomed to the smoke, it was very 5 on her eyes and lungs. "My eyes watered constantly, I coughed like a new smoker, and I had to step outside regularly to get fresh air-much to the delight of the local kids who sat on the steps waiting for us to emerge."

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