问答题In January New England was covered with thick snow and ice while Miami was warm with flowers in blossoms.

问答题在车没有停稳之前请不要站起来。

问答题{{B}}加强中非团结合作推动建设和谐世界{{/B}} 中华民族历来爱好和平，主张强不凌弱、富不侮贫，主张协和万邦。早在600年前，中国明代著名航海家郑和率领庞大船队4次到达非洲东海岸。他们给非洲人民带来的是和平的愿望和真诚的友谊，而不是刀剑枪炮和掠夺奴役。在近代以后的100多年中，中国人民曾经饱受列强的殖民侵略和压迫，同绝大多数非洲国家有着相似的历史遭遇和悲惨命运。中国人民从19世纪中叶到20世纪中叶开展的英勇的斗争，就是要反对殖民侵略和民族压迫，实现中华民族的独立和中国人民的解放，进而建设人民当家作主的新国家。今天，中国人民早已实现了自己的百年夙愿，正在为创造自己更加美好的生活而团结奋斗。正因为有着这样刻骨铭心的历史经历和奋斗过程，所以中国人民最坚决地反对一切形式的殖民、压迫、奴役活动，最真诚地同情一切为争取民族独立和人民幸福而奋斗的民族，最深切地理解这些民族的愿望和要求。新中国成立后，中国政府和人民为非洲人民争取民族解放、反对殖民主义统治的英勇斗争提供了政治上、物质上、道义上的坚定支持。中国过去不会、现在不会、将来也决不会把自己的意志以及不平等的做法强加于其他国家，更不会做任何有损于非洲国家和人民的事。中国尊重非洲人民自主选择适合自己国情的政治制度和发展道路，支持非洲国家加强民主法制建设和实施良好管理，支持非洲国家充分发挥自身优势、积极参与国际合作和竞争。

问答题“打桥牌”(bridge)的风格是与同伴紧密合作，与另外两家组成的联盟斗智斗勇，进行激烈竞争。“打麻将”(mahjong)则是孤军作战，看着上家，防着下家，自己和不了，也不让别人和。在工作中，这种做法显然是不好的，尤其是自己出不了成绩，也不让人家出成绩，更是严重影响科技事业的发展。团队精神是任何一项集体事业所必需的。

问答题You can learn something about a place by reading a travel book, but you learn more when you actually travel there.

问答题People remember emotionally charged events more easily than they recall the quotidian. A sexual encounter trumps doing the grocery shopping. A mugging trumps a journey to work. Witnessing a massacre trumps pretty well anything you can imagine. That is hardly surprising. Rare events that might have an impact on an individual's survival or reproduction should have a special fast lane into the memory bank—and they do. It is called the α2b-adrenoceptor, and it is found in the amygdala, a part of the brain involved in processing strong emotions such as fear. The role of the α2b-adrenoceptor is to promote memory formation—but only if it is stimulated by adrenaline. Since emotionally charged events are often accompanied by adrenaline secretion, the α2b-adrenoceptor acts as a gatekeeper that decides what will be remembered and what discarded. However, the gene that encodes this receptor comes in two varieties. That led Dominique de Quervain, of the University of Zurich, to wonder if people with one variant would have better emotional memories than those with the other. The short answer, just published in Nature Neuroscience, is that they do. Moreover, since the frequencies of the two variants are different in different groups of people, whole populations may have different mixtures of emotional memory. The reason Dr. de Quervain suspected the variants might work differently is that the rarer one looks like the commoner one when the latter has a memory-enhancing drug called yohimbine attached to it. His prediction, therefore, was that better emotional memory would be associated with the rarer version. And that did, indeed, turn out to be the case in. his first experiment. This involved showing students photographs of positive scenes such as families playing together, negative scenes such as car accidents, and neutral ones, such as people on the phone. Those students with at least one gene for the rarer version of the protein (everyone has two such genes, one from his father and one from his mother) were twice as good at remembering details of emotionally charged scenes than were those with only the common version. When phone-callers were the subject, there was no difference in the quality of recall. That is an interesting result, but some of Dr. de Quervain's colleagues at the University of Konstanz, in Germany, were able to take it further in a second experiment. In fact, they took it all the way along a dusty road in Uganda, to the Nakivale refugee camp. This camp is home to hundreds of refugees of the Rwandan civil war of 1994. In this second experiment the researchers were not asking about photographs. With the help of specially trained interviewers, they recorded how often people in the camp suffered flashbacks and nightmares about their wartime experiences. They then compared those results with the α2b-adreno-ceptor genes in their volunteers. As predicted, those with the rare version had significantly more flashbacks than those with only the common one. Besides bolstering Dr. de Quervain's original hypothesis, this result is interesting because only 12% of the refugees had the rarer gene. In Switzerland, by contrast, 30% of the population has the rare variety—and the Swiss are not normally regarded as an emotional people. Whether that result has wider implications remains to be seen. Human genetics has a notorious history of jumping to extravagant conclusions from scant data, but that does not mean conclusions should be ducked if the data are good. In this case, the statistics suggest Rwanda may have been lucky: the long-term mental-health effects of the war may not be as widespread as they would have been in people with a different genetic mix. On the other hand, are those who easily forget the horrors of history condemned to repeat them?

问答题自1978年中国实行儿童计划免疫以来，中国儿童的健康发展水平和营养状况不断提高。

问答题The footwear manufacturing industry is made up predominantly of small companies, increasingly under pressure from imports.

问答题Besides teaching teenagers to protect their computers, the course opens their imagination to the challenges in cyberspace, and seeks to excite them into a college education in computer engineering and a professional career in cyber security.

问答题人们坚信奥林匹克的理念，相信有健康的体魄才有健康的头脑，运动竞技的精神比引爆战争的恶性竞争更为可取。

问答题Walk along the River Warnow, in northern Germany, and you may be lucky enough to spot a SeaFalcon, a sleek, white machine with two propellers, two wings and a distinctly unbirdlike tail. It looks like an aircraft. Which is what it is. Except, it isn"t. It is a ship—at least in the eyes of the International Marine Organisation, which regulates such things. That matters, because ships are much more lightly regulated than aircraft. The SeaFalcon is really a ground-effect vehicle. It flies only over water and only two metres above that water. This means the air beneath its wings is compressed, giving it additional lift. In effect, it is floating on a cushion of air. That makes it far cheaper to run than a plane of equivalent size, while the fact that it is flying means it is far faster—at 80-100 knots—than a ship of any size. Its designer, Dieter Puls, thus hopes it will fill a niche for the rapid transport of people and light goods in parts of the world where land and sea exist in similar proportions. The theory of ground-effect vehicles goes back to the 1920s, when Carl Wieselsberger, a German physicist, described how the ground effect works. There was then a period of silence, followed by a false start. In the 1960s the Soviet armed forces thought that ground-effect vehicles would be ideal for shifting heavy kit around places like the Black Sea. Their prototypes did fly, but were never deployed in earnest and their jet engines consumed huge amounts of fuel. This did, however, prove that the idea worked. And two German engineers, Mr. Puls and Hanno Fischer (whose version is called Airfish 8), have taken it up and made it work by using modern, composite materials for the airframes, and propellers rather than jets for propulsion. One reason the Soviet design was so thirsty is that the power needed to lift a ground-effect vehicle is far greater than that needed to sustain it in level flight. The Soviet design used heavy jet engines to deliver the power needed for take-off. But the SeaFalcon uses a hydrofoil to lift itself out of the water, and Airfish 8 uses what Mr. Fischer calls a hoverwing—a system of pipes that takes air which has passed through the propeller and blasts it out under the craft during take-off. The next stage, of course, is to begin production in earnest—and that seems to be about to happen. Mr. Puls says he has signed a deal with an Indonesian firm for an initial order of ten, while both he and Mr. Fischer are in discussions with Wigetworks, a Singaporean company, with a view to starting production next year. South-East Asia, with its plethora of islands and high rate of economic growth is just the sort of place where ground-effect vehicles should do well. All of which sounds optimistic. But a note of caution is needed. For another sort of ground-effect vehicle was also expected to do well and ended up going nowhere. The hovercraft differed from the vehicles designed by Messrs Puls and Fischer in that it relied on creating its own cushion of air, rather than having one provided naturally. That meant it could go on land as well as sea—which was thought at the time (the 1950s) to be a winning combination. Sadly, it was not. Hovercraft have almost disappeared. But then, in the eyes of the regulators, they counted as aircraft.

问答题他承认有不少国家和公众对中国还存在理解上的不足。

问答题我担心他会把我拽下去，这使我高度紧张。

问答题同行是冤家。

问答题由于各方在发展中国家提高农产品关税这一问题上无法达成一致，上个月在日内瓦会议举行的多哈(Doha)回合谈判最终破裂。

问答题例如，放射性的铷的一个原子退化后，把一个中子转变成一个质子并释放出一个电子，形成一个锶(另外一种元素)原子，在这个过程中产生能量。退化后的放射性子产品——在这里就是锶原子——会以一个极高的温度分散化解。所以测量一下现在矿物中铷原子和锶原子的确切比例，研究人员就会推导出该矿物在冷却到凝结温度以下之后又埋没了多少年。这种回溯方法具有弊端，因为很难发现含有铷元素的矿物、测量铷元素和锶元素的精确比例，而且推断出的时间只是矿物最后冷却到凝结温度之下的时间。因为凝结温度很高，这种方法只适用于再结晶岩石(火成岩或变质岩)，不适合沉积岩——含铷元素的矿质，它能记载岩石腐化成沉积物的冷却时间，而不是沉积物自己的蜕变年龄。

问答题Imagine fishermen walking down to the seashore, ready to carry out their early morning routine of preparing their boats and net. As usual they hope for a good catch of fish. But to their astonishment, a horrible sight meets their still sleepy eyes. Thousands of fish have been washed ashore dead. The cause of this mass destruction? A red tide! Red tides are a global phenomenon, They have been observed on both the Atlantic and the Pacific coasts of the United States and Canada. They have also occurred in many other places. Though relatively few people are aware of them, red tides are not new. In the Philippines, a red tide was first seen in the province of Bata an in 1908. Since then, red tides have been seen in many other coastal areas A Philippines red tide expert told us that "besides the fish kills, the Philippines has documented 1,926 eases of dead shellfish poisoning caused by red tides." The term "red tide" applies to the discoloration of water that sometimes occurs in certain areas of the ocean or sea. Although the color is often red, it may also be shades of brown or yellow. The World Book Encyclopedia reports that "the discolored areas may range from less than a few square yards to more than 2,600 square kilometers." What causes such discoloration? Red tides are generally caused by several species of single-celled organisms. These tiny organisms have hair-like projections which they use to propel them-selves in water. There are about 2,000 varieties of these organisms, 30 of which carry poisonous substances these minute organisms usually stay in warm waters with high content of salt. A red tide occurs when there is a sudden and rapid bloom of these organisms. The concentration of these organisms may swell to 50,000,000 per quart of water! Although scientists do not fully understand why this happens. It is known that these organisms accumulate when certain conditions simultaneously affect the water. These include abnormal weather, optimum temperatures, an over-supply of nutrients in the water, a generous amount of sunlight, and favorable water currents. When a heavy rainfall occurs, minerals and other nutrients are sometimes washed from the land into coastal water. These nutrients can contribute to the breeding of the organisms. The result? Red tides!

问答题泰勒斯认为水是万物之始；阿那克西米尼认为空气是万物之始；赫拉克利特则认为火是万物之始。(泰勒斯：Thales；阿那克西米尼：Anaximenes；赫拉克利特：Heraclitus)

问答题我进屋时，他{{U}}在读书{{/U}}。

问答题It is natural for young people to be critical of their parents at times and to blame them for most of misunderstandings between them. 16 They have always complained that their parents are out of touch with modern ways; that they are possessive and dominant; that they do not trust their children to deal with crisis. 17 It is universally acknowledged that parents often underestimate their teenage children and also fade in their memory how they themselves felt when young. Young people often irritate their parents with their choices in clothes and hairstyles, in entertainers and music. This is not their motive. 18 They feel cut off from the adult world into which they have not yet been accepted so they create a culture and society of their own. Then, if it turns out that their music or entertainers or vocabulary or clothes or hairstyles irritates their parents, this gives them additional enjoyment. They feel they are superior, at least in a small way, and that they are leaders in style and taste. Sometimes they are resistant and proud because they do not want their parents to approve of what they do. If their parents did approve, it looks as if they are betraying their own age group. But in that case, they are assuming that they are the underdog: you can"t win but at least you can keep your honor. This is a passive way of looking at things. 19 It is natural enough after long years of childhood, when they were completely under their parents" domination. But it ignores the fact that they are now beginning to be responsible for themselves. My advice to young people is as follows: if you plan to control your life, cooperation can be pan of that plan. 20 You can charm others, especially your parents, into doing things the way you want. You can impress others with your sense of responsibility and initiative, so that they will give you the authority to do what you want to do.