2019年6月1日托福阅读考试真题及答案
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2019年托福阅读考试真题答案2019年托福阅读考试真题答案(网友版)1、鸟类是恐龙的后代;2、陨石为什么对地球形成有影响;3、落叶树与长青树;4、讲fish在temperate water和permanent water,然后fun gi在这俩不同环境里对植物的作用,然后为了提高生产农业上的应用;5、一种动物数量减少的三个因素。
人为的物种引进,但是clim ate最显著,让migrate提前;6、讲化学风化和生物风化。
chemistry weathering 跟biolog y weathering,讲rock腐蚀。
有三种过程:水化氧化和碳酸化,化学的有三种:湿度、氧气、钙化物;7、temporary pools,主要说生物在这些pool里的好处,比如说main predator fish没法在那个dry的环境里生存之类的8、碳断代法在北美F考古点的应用。
最初的研究发现人类最早在north American,是F群落,然后研究sample来证明中间出了问题,但是后来reexam的时候证实了,但是后来又discovery了一些spearpoints,发现其实Celvius更早。
是Radio Carbon一个方法分析一个人种的时间,大长段落。
一直以为是很古老的,但是俩人做了research以后发现比它年轻很多,然后有人又做了research证明确实如此;9、在16世纪,欧洲人口增长了大约三分之一。
人口的增长极大地影响了普通欧洲人的生活。
第一阶段的增长有益的,农场的盈余带动了城镇的经济增长。
然而随着人口增多问题也逐渐显现,对政府财政和普通人的生活都造成了严重影响;10、土星pluto’s status;11、蝙蝠定位bats echolocation12、New England农业13、天文,chronites14、动物数量和捕食数量,成功率的关联;15、19世纪美国的文化与艺术。
主要讲美国文学从英国中分离,逐渐演化出国家特色和民族特色,举了很多名人、作家和艺术家的例子;16、一篇讲bat,超声波回声定位,很精准可以捕捉猎物。
2019年托福阅读模拟试题及答案解析(3)In eighteenth-century colonial America, flowers andfruit were typically the province of the botanical artist interested in scientific illustration rather than being the subjects of fine art. Early in the nineteenth century, however, the Peale family of Philadelphia established thestill life, a picture consisting mainly of inanimate objects, as a valuable part of the artist's repertoire. The fruit paintings by James and Sarah Miriam Peale are simple arrangements of a few objects, handsomely colored, small in size, and representing little more than what they are. In contrast were the highly symbolic, complex compositions by Charles Bird King, with their biting satire and criticalsocial commentary. Each of these strains comminuted into and well past mid-century.John F. Francis (1808-86) was a part of the Pennsylvania still-life tradition that arose, at least in part, from the work of the Peales. Most of his still lifes date from around 1850 to 1875. Luncheon Still Life looks like one of thePeales' pieces on a larger scale, with greater complexity resulting from the number of objects. It is also indebted to the luncheon type of still life found in seventeenth-century Dutch painting. The opened bottles of wine and the glasses of wine partially consumed suggest a number of unseen guests.The appeal of the fruit and nuts to our sense of taste is heightened by the juicy orange, which has already been sliced. The arrangement is additive, that is, made up of manydifferent parts, not always compositionally integrated, withall objects of essentially equal importance.About 1848, Severin Roesen came to the United Statesfrom Germany and settled in New York City, where he began to paint large, lush still lifes of flowers, fruit, or both,often measuring over four feet across. Still Life with fruit and champagne is typical in its brilliance of color, meticulous rendering of detail, compact composition, and unabashed abundance. Rich in symbolic overtones, thebeautifully painted objects carry additional meanings —butterflies or fallen buds suggest the impermanence of life,a bird's nest with eggs means fertility, and so on. Above all, Roesen's art expresses the abundance that America symbolizedto many of its citizens.1. What does the passage mainly discuss?(A) The artwork of James and Sarah Miriam Peale(B) How Philadelphia became a center for art in the nineteenth century(C) Nineteenth-century still-life paintings in theUnited States(D) How botanical art inspired the first still-life paintings2. Which of the following is mentioned as acharacteristic of the still lifes of James and Sarah Miriam Peale?(A) simplicity(B) symbolism(C) smooth texture(D) social commentary3. The word "biting尖利的" in line 8 is closest in meaning to(A) simple(B) sorrowful(C) frequent(D) sharp4. The word "It" in line 13 refers to(A) Luncheon Still Life(B) one of the Peales' pieces(C) a larger scale(D) the number of objects5. The word "heightened" in line 16 is closest in meaning to(A) complicated(B) directed(C) observed(D) increased6. The word "meticulous" in line 23 is closest in meaning to(A) careful(B) significant(C) appropriate(D) believable7. Which of the following terms is defined in the passage ?(A) "repertoire" (line 5)(B) "satire" (line 8)(C) "additive" (line 17)(D) "rendering" (line 23)8. All of the following are mentioned as characteristics of Roesen's still lifes EXCEPT that they(A) are symbolic(B) use simplified representations of flowers and fruit(C) include brilliant colors(D) are large in size9. Which of the following is mentioned as the dominant theme in Roesen's painting?(A) Fertility(B) Freedom(C) Impermanence(D) AbundanceCADAD ACBD。
2019年托福阅读模拟试题及答案托福阅读模拟试题The war for independence from Britain was a long and economically costly conflict. The New England fishingindustry was temporarily destroyed, and the tobacco colonies in the South were also hard hit. The trade in imports was severely affected, since the war was fought against the country that had previously monopolized the colonies’ supply of manufactured goods. The most serious consequences werefelt in the cities, whose existence depended on commercial activity. Boston, New York, Philadelphia, and Charleston were all occupied for a time by British troops. Even when the troops had left, British ships lurked in the harbors and continued to disrupt trade.American income from shipbuilding and commerce declined abruptly, undermining the entire economy of the urban areas. The decline in trade brought a fall in the American standard of living. Unemployed shipwrights, dock laborers, and coopers drifted off to find work on farms and in small villages. Some of them joined the Continental army, or if they were loyal to Britain, they departed with the British forces. The population of the New York City declined from 21,000 in 1774 to less than half that number only nine years later in 1783.The disruptions produced by the fighting of the war, by the loss of established markets for manufactured goods, by the loss of sources of credit, and by the lack of new investment all created a period of economic stagnation that lasted for the next twenty years.1.Why does the author mention the fishing industry and the tobacoo colonies?A. to show how the war for independence affected the economyB. to compare the economic power of two different regionsC. to identify the two largest commercial enterprises in AmericaD. to give examples of industries controlled by British forces2. Why does the author mention the population of New York City in paragraph 2?A. to show that half of New York remained loyal toBritainB. to compare New York with other cities occupied during the warC. to emphasize the great short-term cost of the war for New YorkD. to illustrate the percentage of homeless people in New York3. Chinese people had fought for independence fromforeign countries for more than 100 years; we had lost lands, powers, resources and lives during that period. Today, China faces a new challenge that how the development can maintain, in other words, how China doesn’t lag behind. Please write an essay to express your ideas.答案:1.A 2.C。
2019年托福考试模拟训练试题及答案3The end of the nineteenth century and the early years of the twentieth century were marked by the development of an international Art Nouveau style, characterized by sinuous lines, floral and vegetable motifs, and soft evanescent coloration. The Art Nouveau style was an eclectic one, bringing together elements of Japanese art, motifs of ancient cultures, and natural forms. The glass objects of this style were elegant in outline, although often deliberately distorted, with pale or iridescent surfaces. A favored device of the style was to imitate the iridescent surface seen on ancient glass that had been buried. Much of the Art Nouveau glass produced during the years of its greatest popularity had been generically termed "art glass." Art glass was intended for decorative purposes and relied for its effect upon carefully chosen color combinations and innovative techniques.France produced a number of outstanding exponents of the Art Nouveau style; among the most celebrated was Emile Galle (1846-1904). In the United States, Louis Comfort Tiffany (1843-1933) was the most noted exponent of this style, producing a great variety of glass forms and surfaces, which were widely copied in their time and are highly prized today. Tiffany was a brilliant designer, successfully combining ancient Egyptian, Japanese, and Persian motifs.The Art Nouveau style was a major force in the decorative arts from 1895 until 1915, although its influence continued throughout the mid-1920's. It was eventually to be overtaken by a new school of thought known as Functionalism that hadbeen present since the turn of the century. At first restricted to a small avant-garde group of architects and designers, Functionalism emerged as the dominant influence upon designers after the First World War. The basic tenet of the movement — that function should determine form — was not a new concept. Soon a distinct aesthetic code evolved:form should be simple, surfaces plain, and any ornament should be based on geometric relationships. This new design concept, coupled with the sharp postwar reactions to the styles and conventions of the preceding decades, created an entirely new public taste which caused Art Nouveau types of glass to fall out of favor. The new taste demanded dramatic effects of contrast, stark outline and complex textural surfaces.1. What does paragraph 1 mainly discuss?(A) Design elements in the Art Nouveau style(B) The popularity of the Art Nouveau style(C) Production techniques for art glass(D) Color combinations typical of the Art Nouveau style2. The word "one" in line 4 refers to(A) century(B) development(C) style(D) coloration3. Paragraph 1 mentions that Art Nouveau glass was sometimes similar to which aspect of ancient buried glass?(A) The distortion of the glass(B) The appearance of the glass surface(C) The shapes of the glass objects(D) The size of the glass objects4. What is the main purpose of paragraph 2?(A) to compare different Art Nouveau styles(B) to give examples of famous Art Nouveau artists(C) to explain why Art Nouveau glass was so popular in the United States(D) to show the impact Art Nouveau had on other cultures around the world5. The word "prized" in line 16 is closest in meaning to(A) valued(B) universal(C) uncommon(D) preserved6. The word "overtaken" in line 20 is closest in meaning to(A) surpassed 超过,超出(B) inclined(C) expressed(D) applied7. What does the author mean by stating that "function should determine form" (lines 23-24)?(A) A useful object should not be attractive.(B) The purpose of an object should influence its form.(C) The design of an object is considered moresignificant than its function.(D) The form of an object should not include decorative elements.8. It can be inferred from the passage that one reason Functionalism became popular was that it(A) clearly distinguished between art and design(B) appealed to people who liked complex painted designs(C) reflected a common desire to break from the past(D) was easily interpreted by the general public9. Paragraph 3 supports which of the following statements about Functionalism?(A) Its design concept avoided geometric shapes.(B) It started on a small scale and then spread gradually.(C) It was a major force in the decorative arts beforethe First World War.(D) It was not attractive to architects and designers.10. According to the passage , an object made in the Art Nouveau style would most likely include(A) a flowered design(B) bright colors(C) modern symbols(D) a textured surfaceACBBA ABCBA词汇补充:arena 场地arithmetic 算术armour 盔甲aromatic 芳香的arsenal 军工厂arthritis 关节炎artistry 艺术才能asphalt 沥青assembly line 流水作业线asteroid 小行星astrobleme 损星坑astronaut 宇航员astute 敏锐的auction 拍卖auditorium 礼堂avalanche 雪崩avand-garde 先锋aviation 航空baboon 狒狒baleen 鲸须ballad 民谣。
2019托福阅读:模拟试题及答案解析(6)【托福】Although only 1 person in 20 in the Colonial periodlived in a city, the cities had a disproportionate influence on the development of North America. They were at the cutting edge of social change. It was in the cities that the elements that can be associated with modern capitalism first appeared — the use of money and commercial paper in place of barter, open competition in place of social deference and hierarchy, with an attendant rise in social disorder, and the appearance of factories using coat or water power in place of independent craftspeople working with hand tools. "The cities predicted the future," wrote historian Gary. B. Nash, "even though they were but overgrown villages compared to the great urban centers of Europe, the Middle East and China."Except for Boston, whose population stabilized at about 16,000 in 1760, cities grew by exponential leaps through the eighteenth century. In the fifteen years prior to the outbreak of the War for independence in 1775, more than200,000 immigrants arrived on North American shores. This meant that a population the size of Boston was arriving every year, and most of it flowed into the port cities in the Northeast. Philadelphia's population nearly doubted in those years, reaching about 30,000 in 1774, New York grew at almost the same rate, reaching about 25,000 by 1775.The quality of the hinterland dictated the pace of growth of the cities. The land surrounding Boston had always been poor farm country, and by the mid-eighteenth century itwas virtually stripped of its timber. The available farmland was occupied, there was little in the region beyond the cityto attract immigrants. New York and Philadelphia, by contrast, served a rich and fertile hinterland laced with navigable watercourses. Scots, Irish, and Germans landed in thesecities and followed the rivers inland. The regions around the cities of New York and Philadelphia became the breadbasketsof North America, sending grain not only to other coloniesbut also to England and southern Europe, where crippling droughts in the late 1760's created a whole new market.1. Which of the following aspects of North America inthe eighteenth century does the passage mainly discuss?(A) The effects of war on the growth of cities(B) The growth and influence of cities(C) The decline of farming in areas surrounding cities(D) The causes of immigration to cities2. Why does the author say that "the cities had a disproportionate influence on the development of North America" (lines 1-2)?(A) The influence of the cities was mostly negative(B) The populations of the cities were small, but their influence was great.(C) The cities were growing at a great rate.(D) Most people pretended to live in cities3. The phrase "in place of " in lines 4-5 is closest in meaning to(A) connected to(B) in addition to(C) because of(D) instead of4. The word "attendant伴随的" in line 6 is closest in meaning to(A) avoidable(B) accompanying(C) unwelcome(D) unexpected5. Which of the following is mentioned as an element of modern capitalism?(A) Open competition(B) Social deference(C) Social hierarchy(D) Independent craftspeople6. It can be inferred that in comparison with North American cities, cities in Europe, the Middle East, and China had(A) large populations(B) little independence。
Part I Writing (30 minutes)Directions: For this part, you are allowed 30 minutes to write an essay on the importance of team spirit and communication in the workplace. You should write at least 150 words but no more than 200 words.________________________________________________________________________________________________________________________________________________________________________________________________________________________Part Ⅰ WritingThe Importance of Team Spirit and Communication in the WorkplaceAs the saying goes, when teamwork kicks in, nobody can beat you. It highlights the critical role that team spirit plays in completing a task. In my view, team spirit and communication are especially important in the workplace.First of all, with the increasingly fierce competition between enterprises, in order to achieve the desired results, cooperation and communication among colleagues are particularly important because they can maximize work efficiency. Secondly, promoting team spirit and communication at work can ensure that everyone understand where the company is going and get them all actively involved in the development of the company. Thirdly, cooperation and communication at work can enhance the interaction between coworkers and form good interpersonal relationships, which is essential to build a friendly, cooperative, and harmonious working atmosphere in the enterprise culture.To conclude, we cannot deny that it is almost always the joint efforts of a whole team that decide the success or failure of a project. Therefore, for everyone in the workplace, we should learn to cooperate and communicate effectively with team members, so as to achieve a win-win situation.Part II Listening Comprehension (30 minutes)Section ADirections: In this section, you will hear two long conversations. At the end of each conversation, you will hear four questions. Both the conversation and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D). Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre.Questions 1 to 4 are based on the conversation you have just heard.1. A) A six-month-long negotiation.B) Preparations for the party.C) A project with a troublesome(麻烦的、讨厌的)client(客户、顾客、委托人).D) Gift wrapping for the colleagues.2. A) Take wedding photos.B) Advertise her company.C) Start a small business.D) Throw a celebration party.3. A) Hesitant.B) Nervous.C) Flattered(受宠若惊、阿谀奉承、感到荣幸的).D) Surprised.4. A) Start her own bakery面包店.B) Improve her baking烘焙skill.C) Share her cooking experience.D) Prepare for the wedding.Questions 5 to 8 are based on the conversation you have just heard.5. A) They have to spend more time studying.B) They have to participate in club activities.C) They have to be more responsible for what they do.D) They have to choose a specific academic discipline.6. A) Get ready for a career.B) Make a lot of friends.C) Set a long-term goal.D) Behave like adults7. A) Those who share her academic interests.B) Those who respect her student commitments(承诺、保证、委托、献身).C) Those who can help her when she is in need.D) Those who go to the same clubs as she does.8. A) Those helpful for tapping their potential.B) Those conducive to improving their social skills.C) Those helpful for cultivating individual interests.D) Those conducive to(有益于、助于)their academic studies.Section BDirections: In this section, you will hear two passages. At the end of each passage, you will hear three or four questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D. Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre.Questions 9 to 11 are based on the passage you have just heard.9. A) They break away(突然离开、逃跑、脱离)from traditional ways of thinking.B) They are prepared to work harder than anyone else.C) They are good at refining old formulas.D) They bring their potential into full play.10. A) They contributed to the popularity of skiing worldwide.B) They resulted in a brand-new(崭新的、绝对新的)style of skiing滑雪technique.C) They promoted the scientific use of skiing poles.D) They made explosive news in the sports world.11. A) He was recognized as a genius in the world of sports.B) He competed in all major skiing events in the world.C) He won three gold medals金牌in one Winter Olympics.D) He broke three world skiing records in three years.Questions 12 to 15 are based on the passage you have just heard.12. A) They appear restless.B) They lose consciousness.C) They become upset.D) They die almost instantly即刻、立刻.13. A) It has an instant一瞬间effect on your body chemistry.B) It keeps returning to you every now and then.C) It leaves you with a long lasting impression.D) It contributes to the shaping of your mind.14. A) To succeed while feeling irritated.B) To feel happy without good health.C) To be free from frustration and failure.D) To enjoy good health while in dark moods情绪、心情15. A) They are closely connected.B) They function in a similar way.C) They are too complex to understand.D) They reinforce each other constantly.Section CDirections: In this section, you will hear three recordings of lectures or talks followed by three or four questions. The recordings will be played only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D. Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre.Questions 16 to 18 are based on the recording you have just heard.16. A) They differ in their appreciation of music.B) They focus their attention on different things.C) They finger the piano keys in different ways.D) They choose different pieces of music to play.17. A) They manage to cooperate well with their teammates.B) They use effective tactics to defeat their competitors.C) They try hard to meet the spectators’ expectations.D) They attach附加、系、附上great importance to high performance高性能、高效能.18. A) It marks a breakthrough in behavioral science.B) It adopts a conventional approach to research.C) It supports a piece of conventional传统的、常规的wisdom智慧、才智.D) It gives rise to controversy among experts.Questions 19 to 21 are based on the recording you have just heard.19. A) People’s envy of slim models.B) People’s craze for good health.C) The increasing range of fancy products.D) The great variety of slimming减肥products.20. A) They appear vigorous.B) They appear strange.C) They look charming.D) They look unhealthy.21. A) Culture and upbringing教养、养育、抚育.B) Wealth and social status.C) Peer pressure.D) Media influence.Questions 22 to 25 are based on the recording you have just heard.22. A) The relation between hair and skin.B) The growing interest in skin studies.C) The color of human skin.D) The need of skin protection.23. A) The necessity to save energy.B) Adaptation改编、适应to the hot environment.C) The need to breathe with ease.D) Dramatic climate changes on earth.24. A) Leaves and grass.B) Man-made shelter.C) Their skin coloring.D) Hair on their skin.25. A) Their genetic遗传、基因makeup组成、补充、化妆品began to change.B) Their communities began to grow steadily.C) Their children began to mix with each other.D) Their pace of evolution began to quicken.Part III Reading Comprehension (40 minutes)Section ADirections: In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter. Please mark the corresponding letter for each item on Answer Sheet 2 with a single line through the centre. You may not use any of the words in the bank more than once.Pasta意大利面食、面团is no longer off the menu, after a new review of studies suggested that the carbohydrate can form part of组成、形成a healthy diet, and even help people lose weight. For years, nutritionists have recommended that pasta be kept to a_I_ 26_minimum_, to cut calories, prevent fat build-up and stop blood sugar_L_ 27_ shooting_ up.The low-carbohydrate低碳水化合物food movement gave birth to such diets as the Atkins, Paleo and Keto, which advised swapping交换、代替foods like bread, pasta and potatoes for vegetable, fish and meat. More recently the trend of swapping spaghetti for vegetables has been_B_ 28_championed冠军、拥护者_ by clean-eating experts.But now a_N_ 29_systematic有系统的_ review回顾、评论and analysis of 30 studies by Canadian researchers found that not only does pasta not cause weight gain, but three meals a week can help people drop more than half a kilogram over four months. The reviewers found that pasta had been unfairly demonized (妖魔化) because it had been_G_ 30_ lumped集中地_ in with other, morefat-promoting carbohydrates."The study found that pasta didn't_E_ 31_contribute_ to weight gain or increase in body fat," said lead author Dr John Sievenpiper. "In_O_ 32_weighing_ the evidence, we can now say with some confidence that pasta does not have an__A 33_adverse(不利的、敌对的、逆的)_ effect on body weight outcomes when it is consumed as part of a healthy dietary pattern." In fact, analysis actually showed a small weight loss. So_D_ 34_contract _ to concerns, perhaps pasta can be part of a healthy diet.Those involved in the_C_ 35_clinical(l临床的、冷静客观的_ trials(尝试、努力)on average ate 3.3 servings of pasta a week instead of other carbohydrates, one serving equaling around half a cup. They lost around half a kilogram over an average follow-up of 12 weeks.A) adverse B) championed C) clinical D) contract E) contribute F) intimate G) lumped H) magnified I) minimum J) radiating K) ration L) shooting M) subscribe N) systematic O) weighingSection BDirections: In this section, you are going to read a passage with ten statements attached to it. Each statement contains information given in one of the paragraphs. Identify the paragraph from which the information is derived. You may choose a paragraph more than once. Each paragraph is marked with a letter. Answer the questions by marking the corresponding letter on Answer Sheet 2.The best Retailers Combine Bricks and ClicksA) Retail profits are falling sharply. Stores are closing. Malls are emptying. The depressing stories just keep coming. Reading the earnings announcements of large retail stores like Macy's, Nordstorm, and Target is about as uplifting as a tour of an intensive care unit. The internet is apparently taking down yet another industry. Brick and mortar stores (实体店) seem to be going the way of the yellow pages. Sure enough, the Census Bureau just released data showing that online retail sales surged 15.2 percent between the first quarter of 2015 and the first quarter of 2016.B) But before you dump all of your retail stocks, there are more facts you should consider. Looking only at that 15.2 percent "surge" would be misleading. It was an increase that was on a small base of 6.9 percent. Even when a tiny number grows by a large percentage terms, it is often still tiny.C) More than 20 years after the internet was opened to commerce, the Census Bureau tells us that brick and mortar sales accounted for 92.3 percent of retail sales in the first quarter of 2016. Their data show that only 0.8 percent of retail sales shifted from offline to online between the beginning of 2015 and 2016.D) So, despite all the talk about drone (无人机) deliveries to your doorstep, all the retail executives expressing anxiety over consumers going online, and even a Presidential candidate exclaiming that Amazon has a "huge antitrust problem," the Census data suggest that physical retail is thriving. Of course, the closed stores, depressed executives, and sinking stocks suggest otherwise. What's the real story?E) Many firms operating brick and mortar stores are in trouble. The retail industry is getting "reinvented," as we describe in our new book Matchmarkers. It's standing in the path of what Schumpeter called a gale (大风) of creative destruction. That storm has been brewing for some time, and as it has reached gale force, most large retailers are searching for a response. As the CFO of Macy's put it recently, "We're frankly scratching our heads."F) But it's not happening as experts predicted. In the peak of the dot. com bubble, brick and mortar retail was one of these industries the internet was going to kill—and quickly. The dot. com bust discredited most predictions of that sort and in the years that followed, conventional retailers' confidence in the future increased as Census continued do report weak online sales. And then the gale hit.G) It is becoming increasingly clear that retail reinvention isn't a simple battle to the death between bricks and clicks. It is about devising retail models that work for people who are making increasing use of a growing array of internet-connected tools to change how they search, shop, and buy. Creativeretailers are using the new technologies to innovate just about everything stores do from managing inventory, to marketing, to getting paid.H) More than drones dropping a new supply of underwear on your doorstep, Apple's massively successful brick-and-mortar-and-glass retail stores and Amazon's small steps in the same direction are what should keep old-fashioned retailers awake at night. Not to mention the large number of creative new retailers, like Bonobos, that are blending online and offline experiences in creative ways.I) Retail reinvention is not a simple process, and it's also not happening on what used to be called "Internet Time." Some internet-driven changes have happened quickly, of course. Craigslist quickly overtook newspaper classified ads and turned newspaper economics upside down. But many widely anticipated changes weren't quick, and some haven't really started. With the benefit of hindsight (后见之明), it looks like the internet will transform the economy at something like the pace of other great inventions like electricity. B2B commerce, for example, didn't move mainly online by 2005 as many had predicted in 2000, nor even by 2016, but that doesn't mean it won't do so over the next few decades. J) But the gale is still blowing. The sudden decline in foot traffic in recent years, even though it hasn't been accompanied by a massive decline in physical sales, is a critical warning. People can shop more efficiently online and therefore don't need to go to as many stores to find what they want. There's a surplus of physical shopping space for the crowds, which is one reason why stores are downsizing and closing.K) The rise of the mobile phone has recently added a new level of complexity to the process of retail reinvention. Even five years ago most people faced a choice. Sit at your computer, probably at home or at the office, search and browse, and buy. Or head out to the mall, or Main Street, look and shop, and buy. Now, just about everyone has a smartphone, connected to the internet almost everywhere almost all the time. Even when a retailer gets a customer to walk in the store, she can easily see if there's a better deal online or at another store nearby.L) So far, the main thing many large retailers have done in response to all this is to open online stores, so people will come to them directly rather than to Amazon and its smaller online rivals. Many are having the same problem that newspapers have had. Even if they get online traffic, they struggle to make enough money online to compensate for what they are losing offline.M) A few seem to be making this work. Among large traditional retailers, Walmart recently reported the best results, leading its stock price to surge, while Macy's, Target, and Nordstorm's dropped. Yet Walmart's year-over-year online sales only grew 7 percent, leading its CEO to lament (哀叹), "Growth here is to slow." Part of the problem is that almost two decades after Amazon field the one-click patent, the online retail shopping and buying experience is filled with frictions. A recent study graded more than 600 internet retailers on how easy it was for consumers to shop, buy, and pay. Almost half of the sites didn't get a passing grade and only 18 percent got an A or B.N) The turmoil on the ground in physical retail is hard to square with the Census data. Unfortunately, part of the explanation is that the Census retail data are unreliable. Our deep look into those data and their preparation revealed serious problems. It seems likely that Census simply misclassifies a large chunk of online sales. It is certain that the Census procedures, which lump the online sales of major traditional retailers like Walmart with "non-store retailers" like food trucks, can mask major changes in individual retail categories. The bureau could easily present their data in more useful ways, but they have chosen not to.O) Despite the turmoil, brick and mortar won't disappear any time soon. The big questions are which, if any, of the large traditional retailers will still be on the scene in a decade or two because they have successfully reinvented themselves, which new players will operate busy stores on Main Streets and maybe even in shopping malls, and how the shopping and buying experience will have changed in each retail category. Investors shouldn't write off brick and mortar. Whether they should bet on the traditional players who run those stores now is another matter.36. Although online retailing has existed for some twenty years, nearly half of the internet retailers still fail to receive satisfactory feedback from consumers, according to a recent survey.M37. Innovative retailers integrate internet technologies with conventional retailing to create new retail models.G38. Despite what the Census data suggest, the value of physical retail's stocks has been dropping.D39. Internet-driven changes in the retail industry didn't take place as quickly as widely anticipated.I40. Statistics indicate that brick and mortar sales still made up the lion's share of the retail business.C41. Companies that successfully combine online and offline business models may prove to be a big concern for traditional retailers.H42. Brick and mortar retailers' faith in their business was strengthened when the dot. com bubble burst.F43. Despite the tremendous challenges from online retailing, traditional retailing will be here to stay for quite some time.O44. With the rise of online commerce, physical retail stores are like to suffer the same fate as the yellow pages.A45. The wide use of smartphone has made it more complex for traditional retailers to reinvent their business.KSection CDirections: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the centre.Passage OneQuestions 46 to 50 are based on the following passage.Professor Stephen Hawking has warned that the creation of powerful artificial intelligence (AI) will be "either the best, or the worst thing, ever to happen to humanity", and praised the creation of an academic institute dedicated to researching the future of intelligence as "crucial to the future of our civilisation and our species".Hawking was speaking at the opening of the Leverhulme Centre for the Future of Inteelgence (LCFI) at Cambridge University, a multi-disciplinary institute that will attempt to tackle some of the open-ended questions raised by the rapid pace of development in AI research. "We spend a great deal of time studying history," Hawking said, "which, let's face it, is mostly the history of stupidity. So it's a welcome change that people are studying instead the future of intelligence."While the world-renowned physicist has often been cautious about AI, rising concerns that humanity could be the architect of its own destruction if it creates a super-intelligence with a will of its own, he was also quick to highlight the positives that AI research can bring. "The potential benefits of creating intelligence are huge," he said. "We cannot predict what we might achieve when our own minds are amplified by AI. Perhaps with the tools of this new technological revolution, we will be able to undo some of the damage done to the natural world by the last one—industrialisation. And surely we will aim to finally eradicate disease and poverty. And every aspect of our lives will be transformed. In short, success in creating AI could be the biggest event in the history of our civilisation."Huw Price, the centre's academic director and the Bertrand Russell professor of philosophy at Cambridge University, where Hawking is also an academic, said that the centre came about partially as a result of the university's Centre for Existential Risk. That institute examined a wider range of potential problems for humanity, while the LCFI has a narrow focus.AI pioneer Margaret Boden, professor of cognitive science at the University of Sussex, praised the progress of such discussions. As recently as 2009, she said, the topic wasn't taken seriously, even among AI researchers. "AI is hugely exciting," she said, "but it has limitations, which present grave dangers given uncritical use."The academic community is not alone in warning about the potential dangers of AI as well as the potential benefits. A number of pioneers from the technology industry, most famously the entrepreneur Elon Musk, have also expressed their concerns about the damage that a super-intelligent AI could do to humanity.46. What did Stephen Hawking think of artificial intelligence?A) It would be vital to the progress of human civilisation.B) It might be a blessing or a disaster in the making.C) It might present challenges as well as opportunities.D) It would be a significant expansion of human intelligence.47. What did Hawking say about the creation of the LCFI?A) It would accelerate the progress of AI research.B) It would mark a step forward in the AI industry.C) It was extremely important to the destiny命运of humankind.D) It was an achievement of multi-disciplinary collaboration.48. What did Hawking say was a welcome change in AI research?A) The shift of research focus from the past to the future.B) The shift of research from theory to implementation.C) The greater emphasis on the negative impact of AI.D) The increasing awareness of mankind's past stupidity.49. What concerns did Hawking raise about AI?A) It may exceed human intelligence sooner or later.B) It may ultimately over-amplify the human mind.C) Super-intelligence may cause its own destruction.D) Super-intelligence may eventually ruin mankind.50. What do we learn about some entrepreneurs企业家from the technology industry?A) They are much influenced by the academic community.B) They are most likely to benefit from AI development.C) They share the same concerns about AI as academics.D) They believe they can keep AI under human control.Passage TwoQuestions 51 to 55 are based on the following passage.The market for products designed specifically for older adults could reach $30 billion by next year, and startups (初创公司) want in on the action. What they sometimes lack is feedback from the people who they hope will use their products. So Brookdale, the country's largest owner of retirement communities, has been inviting a few select entrepreneurs just to move in for a few days, show off their products and hear what the residents have to say.That's what brought Dayle Rodriguez, 28, all the way from England to the dining room of Brookdale South Bay in Torrance, California. Rodriguez is the community and marketing manager for a company called Sentab. The startup's product, SentabTV, enables older adults who may not be comfortable with computers to access email, video chat and social media using just their televisions and a remote control. "It's nothing new, it's nothing too complicated and it's natural because lots of people have TV remotes," says Rodriguez.But none of that is the topic of conversation in the Brookdale dining room. Instead, Rodriguez solicits residents' advice on what he should get on his cheeseburger and how he should spend the afternoon. Playing cards was on the agenda, as well as learning to play mahjong (麻将).Rodriguez says it's important that residents here don't feel like he's selling them something. "I've had more feedback in a passive approach," he says. "Playing pool, playing cards, having dinner, havinglunch," all work better "than going through a survey of question. When they get to know me and to trust me, knowing for sure I'm not selling them something—there'll be more honest feedback from them." Rodriguez is just the seventh entrepreneur to move into one of Brookdale's 1, 100 senior living communities. Other new products in the program have included a kind of full-blow dryer and specially designed clothing that allows people with disabilities to dress and undress themselves.Mary Lou Busch, 93, agree to try the Sentab system. She tells Rodriguez that it might be good for someone, but not for her."I have the computer and FaceTime, which I talk with my family on," she explains. She also has an iPad and a smartphone. "So I do pretty much everything I need to do."To be fair, if Rodriguez had wanted feedback from some more technophobic (害怕技术的) seniors, he might have ended up in the wrong Brookdale community. This one is located in the heart of Southern California's aerospace corridor. Many residents have backgrounds in engineering, business and academic circles.But Rodriguez says he's still learning something important by moving into this Brookdale community: "People are more tech-proficient than we thought."And besides, where else would he learn to play mahjong?51. What does the passage say about the startups创业?A) They never lose time in upgrading products for seniors.B) They want to have a share of the seniors' goods market.C) They invite seniors to their companies to try their products.D) They try to profit from promoting digital products to seniors.52. Some entrepreneurs have been invited to Brookdale to ______.A) have an interview with potential customersB) conduct a survey of retirement communitiesC) collect residents' feedback on their productsD) show senior residents how to use IT products53. What do we know about SentabTV?A) It is a TV program catering to the interest of the elderly.B) It is a digital TV which enjoys popularity among seniors.C) It is a TV specially designed for seniors to view programs.D) It is a communication system via TV instead of a computer.54. What does Rodriguez say is important in promoting products?A) Winning trust from prospective customers.B) Knowing the likes and dislikes of customers.。
Human activities have negative effects on plant and animal sp ecies. Some people think it is too late to do anything about thi s problem. Others believe effective measures can be taken to i mprove this situation. Discuss both views and give your opinio n. (2019/06/01)解析:这篇考题之前真题出现过,看来以往真题的重要性不言而喻。
这篇主要考人类活动和动植物被破坏的关系问题。
其实,雅思写作无论考什么话题,对写作的能力考查是不变的,就是语言词汇、语法、结构及论证逻辑。
至于观点对不对或者说话题内容有没有独特性,都没有太大关系,核心在于你这样说,要有理有据,要说服别人,自己先要被说服。
参考范文:With the developmentof human society, pants and animals are so negatively affected by activities of human that some of them have disappeared for ever.The situation has led us to think more about the life of pants and animals: what to do? Some argue that it is too late to do anything to change the condition; others maintain that there are many measures for us to take for improving that.Personally, we should keep positive attitudes towards the future in terms of balance between human activities and protection of other species. Firstly, when adopting some city development plans, we should take into account the possibility of their affecting plans and animals. When we plan to construct concrete buildings, we should do our best to develop more nature reserves for plants and animals.Secondly, schools, departments and research institutes should make efforts to raise awareness in common people of the ecological importance of plants and animals so as to mobilize them to engage in protection work.Lastly, the government should create and implement a plan for the ecological restoration of natural areas, and establish and improve mechanisms for the restoration and comprehensive management of mountains, forests, lakes and grasslands where plants and animals can live and reproduce.In conclusion, I am confident that the future for human and other species is bright if we take immediate and responsible actions now.(229 words)。
2019年托福阅读试题及答案(卷二)【待插入句子】Indeed, at the height of Athenian democracy there was no government separate from its citizenry.Where would the sentence best fit? Click on square to add the sentence to the passage.【待插入段落】During the fifth century B. C. the council of 500 was extremely influential in shaping policy. In the next century, however, it was the mature assembly that took on decision-making responsibility. By any measure other than that of the aristocrats, who had been upstaged by the supposedly inferior "people," the Athenian democracy was a stunning success. Never before, or since, have so many people been involved in the serious business of self-governance. It was precisely this opportunity to participate in public life that provided a stimulus for the brilliant unfolding of classical Greek culture.1.首先公布答案:3rd square;2.然后我们来看一下待插入的句子:Indeed表示强调,翻译成“确实”;at the height of…在...的巅峰;还有一个there was no…用否定来表示强调:没有政府是跟全体市民分隔开的,言外之意就是说雅典的民主程度非常之高。
2019年托福阅读模拟试题及答案解析托福阅读原文The Development of Steam Power【1】By the eighteenth century, Britain wasexperiencinga severe shortage of energy. Because ofthe growth of population, most of the great forests of medieval Britain had long ago beenreplaced by fields of grain and hay. Wood was in ever-shorter supply, yet it remainedtremendously important.It served as the primary source of heat for all homes and industriesand as a basic raw material. Processed wood (charcoal) was the fuel that was mixed with ironore in the blast furnace to produce pig iron (raw iron). The iron industry’s appetite for woodwas enormous, and by 1740 the British iron industry was stagnating. Vast forests enabledRussia to become the world’s leading producer of iron, much of which was exported to Britain. But Russia’spotential for growth was limited too, and in a few decades Russia would reach thebarrier of inadequate energy that was already holding England back.【2】As this early energy crisis grew worse, Britain looked toward its abundant and widelyscattered reserves ofcoal as an alternative to its vanishing wood. Coal was first used in Britainin the late Middle Ages as a source of heat.By 1640 most homes in London were heated withit, and it also provided heat for making beer, glass, soap, and other products. Coal was notused, however, to produce mechanical energy or to power machinery. It was there thatcoal’spotential wad enormous.【3】As more coal was produced, mines were dug deeper and deeper and were constantlyfilling with water. Mechanical pumps, usually powered by hundreds of horses waling incircles atthe surface, had to be installed Such power was expensive and bothersome. In an attempt toovercome these disadvantages, Thomas Savery in 1698 and Thomas Newcomen in 1705 invented the first primitive steam engines. Both engines were extremely inefficient. Bothburned coal to produce steam, which was then used to operate a pump. However, by theearly 1770s, many of the Savery engines and hundreds of the Newcomen engines wereoperating successfully, though inefficiently, in English and Scottish mines.【4】In the early 1760s, a gifted young Scot named James Watt was drawn to a critical studyof the steam engine. Watt was employed at the time by the University of Glasgow as a skilledcrafts worker making scientific instruments. In 1763:Watt was called on to repair a Newcomenengine being used in a physics course. After a series of observations, Watt saw that theNewcomen’s waste of energy could be reduced by adding a separate condenser. This splendidinvention, patented in 1769, greatly increased the efficiency of the steam engine. The steamengine of Watt and his followers was the technological advance that gave people, at least for awhile, unlimited power and allowed the invention and use of all kinds of power equipment.【5】The steam engine was quickly put to use in several industries in Britain. It drained minesand made possible the production of ever more coal to feed steam engines elsewhere. Thesteam power plant began to replace waterpower in the cotton-spinning mills as well as otherindustries during the1780s, contributing to a phenomenal rise in industrialization. TheBritish iron industry was radically transformed. The useof powerful, steam-driven bellows inblast furnaces helpediron makers switch over rapidly from limited charcoal to unlimited coke(which is made from coal) in the smelting ofpig iron (the process of refining impure iron) after1770 inthe 1780s, Henry Cort developed the puddling furnace, which allowed pig iron to berefined in turn with coke. Cort also developed heavy-duty, steam-powered rolling mills, whichwere capable of producing finished iron in every shape and form.【6】The economic consequence of these technical innovations in steam power was a greatboom in the Britishiron industry. In 1740 annual British iron production wasonly 17:000 tons, but by 1844: with the spread of coke smelting and the impact of Cort’s inventions, ithadincreased to 3,000:000 tons. This was a truly amazing expansion. Once scarce and expensive, iron became cheap, basic, and indispensable to the economy.托福阅读试题1.What can be inferred from paragraph 1 aboutBritain's short supply of wood in the eighteenthcentury?A.Wood from Britain’s great forests was beingexportedto other countries for profit.B.A growing population had required cutting down forests to increase available land forfarming.rger families required the construction of larger homes made from wood.D.What was left of the great forests after the medieval period was being strictly protected.2.Select TWO answer choices that, according to paragraph 1, are true statementsabout Russia’s iron industry in the eighteenth century. To obtain credit, you mustselect TWO answer choices.A.Russia reached its maximum production of iron at the same time as Britain.B.Russia exported much of its iron production to Britain.C.Russia’s appetite for iron increased rapidly after 1740.D.Russia’s energy resourceseventually becameinsufficient and limited the growth of its iron industry.3.The word "abundant" in the passage is closest in meaning toA.reliableB.plentifulC.well-preservedD.existing4.Why are "beer, glass, soap, and other products" mentioned in the discussion ofBritain’s energy?A.To help explain why the energy crisis was so severeB.To show that despite the energy crisis and as early as 1640, London homes were advancedand well suppliedC.To emphasize that after 1640, British homes required energy for more than heatD.To indicate that coal had been used for the production of certain products before theeighteenth century5.According to paragraph 3, all of the following are ways in which the Savery andNewcomen engines were similar EXCEPT:A.Both became relatively inexpensive after the 1770s.B.Both produced steam by burning coal.C.Both were used to operate pumps.D.Both were very inefficient.6.The word "gifted" in the passage is closest in meaning toA.independentB.talentedC.famousD.ambitious7.According to paragraph 4, what was James Watt’s major achievement?A. He was able to apply his understanding of physics to invent a variety of scientificinstruments and tools for skilled crafts workers.B.He taught university physics courses to outstanding students whose observations led tomany patented inventions.C.He improved the efficiency of Newcomen’s engine by preventing energy from being lost.D.He redesigned Newcomen’s engine so that it no longer needed a separate condenser.8.The word "splendid" in the passage is closest in meaning toA.originalB.necessaryC.magnificentD.popular9.Which of the following is NOT mentioned in paragraph 5 as a development thatgreatly changed the production of iron?A.The use of coke in the smelting of pig ironB.The invention of a furnace that used coke to refine ironC.The discovery of a method for increasing the production of charcoalD.The invention of powerful machinery that could shape, form, and finish iron10.In paragraph 6, why does the author compare British iron production in 1740 withthat of 1844?A.To contrast the amounts of iron needed in Britain in two different centuriesB.To illustrate how easy it was to make money using Cort’s inv entionC.To demonstrate the tremendous growth of the iron industry in BritainD.To demonstrate how inexpensive coal had become11.The word "indispensable" in the passage is closest in meaning toA.advantageousB.essentialC.less costlyD.highly stimulating12.According to the passage, which of the following is true about the development ofsteam power?A.The steam engine’s basic technology can be traced back to medieval Britain when steam-powered machinery was being tried in farming activities.B.Although Russia and Britain developed steam-power technology simultaneously, Britain wasfirst to try it in a large-scale industry due to a greater need for iron.C.Steam-power technology was largely the result of improvements developed to increase thesupply of coal as a primary source of energy.D.Adaptations to steam engines required for their use in cotton-spinning mills led to radicaldevelopments in machinery used in the iron industry.13. Look at the four squares [■] that i ndicate where the following sentence could beadded to the passage. Where would the sentence best fit? Energy had not been aproblem for Britain in the past because it relied on a rich source of energy: its vastforests.By the eighteenth century, Britain was experiencing a severe shortage of energy. ■【A】 Because of the growth of population, most of the great forests of medieval Britain had longago been replaced by fields of grain and hay. ■【B】Wood was in ever-shorter supply, yet itremained tremendouslyimp ortant. ■【C】It served as the primary source of heat for allhomes and industries and as a basic raw material. ■【D】Processed wood (charcoal) was thefuel that was mixed withiron ore in the blast furnace to produce pig iron (raw iron). The ironindustry’s appe tite for wood was enormous, and by 1740 the British iron industry wasstagnating. Vast forests enabled Russia to become the world’s leading producer of iron, much ofwhich was exported to Britain. But Russia’s potential for growth was limited too, and in a fewdecades Russia would reach the barrier of inadequate energy that was already holdingEngland back.14. Directions: An introductory sentence for a brief summary of the passage of thepassage is provided below. Complete the summary by selecting the THREE answerchoicesthat express the most important ideas in the passage. Some answer choicesdo not belong in the summary because they express ideas that are not presented inthe passage or are minor ideas in the passage. This questions is worth 2 points.By the eighteenth century, Britain was experiencing a severe shortage of energy.A.The development of blast furnaces for the manufacture of pig iron made the Britain lessdependent on wood.B.After the medieval period, both Russia and Britain began to look for alternative sources ofenergy, such as steam power, in order to maintain the growth of their iron industries.C.Two inventors designed the first steam engines in order to overcome the disadvantages ofrelying on horses to power the pumps used in mining coal.D.James Watt was able to improve upon the efficiency of the steam engine and make it usefulto several industries.E.The puddling furnace increased the availability of charcoal to a variety of industries fromcotton to iron production.F.Steam power increased coal production, which in turn allowed extraordinary growth of theiron industry and the British economy.托福阅读答案1.B2.BD3.B4.D5.A6.B7.C8.C9.C10.C11.B12.C13.A14.CDF。
2019年托福考试专项培训测试题及答案二In seventeenth-century colonial North America, all day-to-day cooking was done in the fireplace. Generally large, fireplaces were planned for cooking as well as for warmth. Those in the Northeast were usually four or five feet high, and in the South, they were often high enough for a person to walk into. A heavy timber called the mantel tree was used asa lintel to support the stonework above the fireplace opening. This timber might be scorched occasionally, but it was far enough in front of the rising column of heat to be safe from catching fire.Two ledges were built across from each other on theinside of the chimney. On these rested the ends of a "lug pole" from which pots were suspended when cooking. Wood froma freshly cut tree was used for the lug pole, so it wouldresist heat, but it had to be replaced frequently because it dried out and charred, and was thus weakened. Sometimes the pole broke and the dinner fell into the fire. When iron became easier to obtain, it was used instead of wood for lug poles, and later fireplaces had pivoting metal rods to hang pots from.Beside the fireplace and built as part of it was the oven. It was made like a small, secondary fireplace with aflue leading into the main chimney to draw out smoke. Sometimes the door of the oven faced the room, but most ovens were built with the opening facing into the fireplace. On baking days (usually once or twice a week) a roaring fire of "oven wood," consisting of brown maple sticks, was maintained in the oven until its walls were extremely hot. The emberswere later removed, bread dough was put into the oven, and the oven was sealed shut until the bread was fully baked.Not all baking was done in a big oven, however. Also used was an iron "bake kettle," which looked like a stewpot on legs and which had an iron lid. This is said to have worked well when it was placed in the fireplace, surrounded by glowing wood embers, with more embers piled on its lid.1. Which of the following aspects of domestic life in colonial North America does the passage mainly discuss?(A) methods of baking bread(B) fireplace cooking(C) the use of iron kettles in a typical kitchen(D) the types of wood used in preparing meals2. The author mentions the fireplaces built in the South to illustrate(A) how the materials used were similar to the materials used in northeastern fireplaces(B) that they served diverse functions(C) that they were usually larger than northeastern fireplaces(D) how they were safer than northeastern fireplaces3. The word "scorched烧焦的" in line 6 is closest in meaning to(A) burned(B) cut(C) enlarged(D) bent4. The word "it" in line 6 refers to(A) the stonework(B) the fireplace opening(C) the mantel tree(D) the rising column of heat5. According to the passage , how was food usually cooked in a pot in the seventeenth century?(A) By placing the pot directly into the fire(B) By putting the pot in the oven(C) By filling the pot with hot water(D) By hanging the pot on a pole over the fire6. The word "obtain" in line 12 is closest in meaning to(A) maintain(B) reinforce(C) manufacture(D) acquire7. Which of the following is mentioned in paragraph 2 asa disadvantage of using a wooden lug pole?(A) It was made of wood not readily available.(B) It was difficult to move or rotate.(C) It occasionally broke.(D) It became too hot to touch.8. It can be inferred from paragraph 3 that, compared to other firewood, "oven wood" produced(A) less smoke(B) more heat(C) fewer embers(D) lower flames9. According to paragraph 3, all of the following were true of a colonial oven EXCEPT:(A) It was used to heat the kitchen every day.(B) It was built as part of the main fireplace.(C) The smoke it generated went out through the main chimney.(D) It was heated with maple sticks.10. According to the passage , which of the following was an advantage of a "bake kettle"?(A) It did not take up a lot of space in the fireplace.(B) It did not need to be tightly closed.(C) It could be used in addition to or instead of the oven.(D) It could be used to cook several foods at one time.BCACD DCBAA。
2019年托福考试专项培训测试题及答案三The sculptural legacy that the new United Statesinherited from its colonial predecessors was far from a rich one, and in fact, in 1776 sculpture as an art form was still in the hands of artisans and craftspeople. Stone carvers engraved their motifs of skulls and crossbones and other religious icons of death into the gray slabs that we still see standing today in old burial grounds. Some skilled craftspeople made intricately carved wooden ornamentationsfor furniture or architectural decorations, while others caved wooden shop signs and ships' figureheads. Although they often achieved expression and formal excellence in their generally primitive style, they remained artisans skilled in the craft of carving and constituted a group distinct from what we normally think of as "sculptors" in today's use of the word.On the rare occasion when a fine piece of sculpture was desired, Americans turned to foreign sculptors, as in the 1770's when the cities of New York and Charleston, South Carolina, commissioned the Englishman Joseph Wilton to make marble statues of William Pitt. Wilton also made a lead equestrian image of King George III that was created in New York in 1770 and torn down by zealous patriots six years later. A few marble memorials with carved busts, urns, or other decorations were produced in England and brought to the colonies to be set in the walls of churches — as in King's Chapel in Boston. But sculpture as a high art, practiced by artists who knew both the artistic theory of their Renaissance-Baroque-Rococo predecessors and the varioustechnical procedures of modeling, casting, and carving rich three-dimensional forms, was not known among Americans in 1776. Indeed, for many years thereafter, the United States had two groups from which to choose — either the local craftspeople or the imported talent of European sculptors.The eighteenth century was not one in which powered sculptural conceptions were developed. Add to this the timidity with which unschooled artisans — originally trained as stonemasons, carpenters, or cabinetmakers — attacked the medium from which they sculpture made in the United States in the late eighteenth century.1. What is the main idea of the passage ?(A) There was great demand for the work of eighteenth-century artisans.(B) Skilled sculptors did not exist in the United States in the 1770's.(C) Many foreign sculptors worked in the United States after 1776.(D) American sculptors were hampered by a lack of tools and materials.2. The word "motifs" in line 3 is closest in meaning to(A) tools(B) prints(C) signatures 签名(D) designs3. The work of which of the following could be seen in burial grounds?(A) European sculptors(B) Carpenters(C) Stone carves(D) Cabinetmakers4. The word "others" in line 6 refers to(A) craftspeople(B) decorations(C) ornamentations(D) shop signs5. The word "distinct" in line 9 is closest in meaning to(A) separate(B) assembled(C) notable(D) inferior6. The word "rare" in line 11 is closest in meaning to(A) festive(B) infrequent(C) delightful(D) unexpected7. Why does the author mention Joseph Wilton in line 13?(A) He was an English sculptor who did work in the United States.(B) He was well known for his wood carvings(C) He produced sculpture for churches.(D) He settled in the United States in 1776.8. What can be inferred about the importation of marble memorials from England?(A) Such sculpture was less expensive to produce locally than to import(B) Such sculpture was not available in the United States.(C) Such sculpture was as prestigious as those made locally.(D) The materials found abroad were superior.9. How did the work of American carvers in 1776 differ from that of contemporary sculptors?(A) It was less time-consuming(B) It was more dangerous.(C) It was more expensive.(D) It was less refined.BDCAA BABD。
2019 年托福考试阅读理解模拟练习题及答案Hormones in the BodyUp to the beginning of the twentieth century,the nervous system was thought to control all communication within thebody and the resulting integration of behavior.Scientists had determined that nerves ran,essentially,on electricalimpulses.These impulses were thought to be the engine for thought,emotion,movement,and internal processes such as digestion.However,experiments by William Bayliss and Ernest Starling on the chemical secretin,which is produced in thesmall intestine when food enters the stomach,eventuallychallenged that view.From the small intestine,secretin travelsthrough the bloodstream to the pancreas.There,it stimulatesthe release of digestive chemicals.In this fashion,the intestinalcells that produce secretin ultimately regulate the productionof different chemicals in a different organ,the pancreas.Such a coordination of processes had been thought torequire control by the nervous system;Bayliss and Starlingshowed that it could occur through chemicals alone.Thisdiscovery spurred Starling to coin the term hormone to refer“to to secretin,taking it from the Greek word hormon,meaningexcite ”or “to set in motion. ”A hormone is a chemicalproduced by one tissue to make things happen elsewhere.As more hormones were discovered,they werecategorized,primarily according to the process by which theyoperated on the body.Some glands(which make up the endocrine system)secrete hormones directly into the bloodstream.Suchglands include the thyroid and the pituitary.The exocrinesystem consists of organs and glands that produce substances that are used outside the bloodstream,primarily fordigestion.The pancreas is one such organ,although it secretes some chemicals into the blood and thus is also part of the endocrine system.Much has been learned about hormones since their discovery.Some play such key roles in regulating bodily processes or behavior that their absence would cause immediate death.The most abundant hormones have effectsthat are less obviously urgent but can be more far-reaching and difficult to track :They modify moods and affect human behavior,even some behavior we normally think of as voluntary.Hormonal systems are very intricate.Even minute amounts of the right chemicals can suppress appetite,calm aggression,and change the attitude of a parent toward achild.Certain hormones accelerate the development of the body,regulating growth and form;others may even define an individual ’s personality characteristics.The quantities and proportions of hormones produced change with age,soscientists have given a great deal of study to shifts in the endocrine system over time in the hopes of alleviatingailments associated with aging.In fact,some hormone therapies are already very common.A combination of estrogen and progesterone has been prescribed for decades to women who want to reduce mood swings,sudden changes in body temperature,and other discomforts caused by lower natural levels of those hormones as they enter middle age.Known as hormone replacement therapy(HRT),the treatment was also believed to prevent weakening of the bones.At leastone study has linked HRT with a heightened risk of heartdisease and certain types of cancer.HRT may also increase the likelihood that blood clots —dangerous because they could travel through the bloodstream and block major bloodvessels —will form.Some proponents of HRT have tempered their enthusiasm in the face of this new evidence,recommending it only to patients whose symptoms interfere with theirabilities to live normal lives.Human growth hormone may also be given to patients who are secreting abnormally low amounts on their own.Because ofthe complicated effects growth hormone has on the body,such treatments are generally restricted to children who would be pathologically small in stature without it.Growth hormone affects not just physical size but also the digestion of foodand the aging process.Researchers and family physicians tendto agree that it is foolhardy to dispense it in cases inwhich the risks are not clearly outweighed by the benefits.27.The word engine in the passage is closest in meaningto(A)desire(B)origin(C)science(D)chemical28.The word it in the passage refers to(A)secretin(B)small intestine(C)bloodstream(D)pancreas29.The word spurred in the passage is closest in meaning to(A)remembered(B)surprised(C)invented(D)motivated30.To be considered a hormone,a chemical produced in the body must(A)be part of the digestive process(B)influence the operations of the nervoussystem (C)affect processes in a different part ofthe body (D)regulate attitudes and behavior31.The glands and organs mentioned in paragraph 3are categorized according to(A)whether scientists understand their function(B)how frequently they release hormones into the body(C)whether the hormones they secrete influence the aging process(D)whether they secrete chemicals into the bloodParagraph 3 is marked with an arrow[→]32.The word key in the passage is closest in meaning to(A)misunderstood(B)precise(C)significant(D)simple33.The word minute in the passage is closest in meaning to(A)sudden(B)small(C)changing(D)noticeable34.Which of the sentences below best expressesthe essential information in the highlighted sentence in the passage?Incorrect answer choices change the meaning in important ways or leave out essential information.(A)Most moods and actions are not voluntary because they are actually produced by the production of hormones in the body.(B)Because the effects of hormones are difficult to measure,scientists remain unsure how far-reaching theireffects on moods and actions are.(C)When the body is not producing enough hormones,urgent treatment may be necessary to avoid psychological damage.(D)The influence of many hormones is not easy to measure,but they can affect both people ’s psychology and actions extensively.35.The word tempered in the passage is closestin meaning to(A)decreased(B)advertised(C)prescribed(D)researched36.Which patients are usually treated with growth hormone?(A)Adults of smaller statue than normal(B)Adults with strong digestive systems(C)Children who are not at risk from the treatment(D)Children who may remain abnormally small37.Which of the following sentences explains the primary goal of hormone replacement therapy?These sentences are highlighted in the passage.(A)The quantities and proportions of hormones produced change with age,so scientists have given a great deal of studyto shifts in the endocrine system over time in the hopes of alleviating ailments associated with aging.(B)A combination of estrogen and progesterone has been prescribed for decades to women who want to reduce moodswings,sudden changes in body temperature,and other discomforts caused by lower natural levels of thosehormones as they enter middle age.(C)HRT may also increase the likelihood that bloodclots —dangerous because they could travel through the bloodstream and block major blood vessels—will form.(D)Because of the complicated effects growth hormonehas on the body,such treatments are generally restricted to children who would be pathologically small in stature without it.38.Look at the four squares that indicate where the following sentence could be added to the passage.The body isa complex machine,however,and recent studies have calledinto question the wisdom of essentially trying to fool its systems into believing they aren ’t aging.Where would the sentence best fit?Click on a square to add the sentence to the passage.39.Directions :An introductory sentence for a brief summary of the passage is provided plete the summary by selecting the THREE answer choices that express the most important ideas in the passage.Some sentences do not belongin the summary because they express ideas that are not presented in the passage or are minor ideas in thepassage.This question is worth 2 points.The class of chemicals called hormones was discovered by two researchers studying a substance produced in the small intestine.Answer ChoicesThe term hormone is based on a Greek word that means"to excite"or"to set in motion."Researchers are looking for waysto decrease the dangers of treatments with growth hormone so that more patients can benefit from it.Hormones can be given artificially,but such treatments have risks and must be used carefully.Hormones can affect not only life processes such as growth but also behavior and emotion.Scientists have discovered that not only the nervous system but also certain chemicals can affect bodilyprocesses far from their points of origin.Hormonereplacement therapy(HRT)may increase the risk of bloodclots and heart disease in middle-age women.Answer KeysReading:27.B28.A29.D30.C31.D32.C33.B34.D35.A36.D37.A38.third square39.1)Scientists have discovered that not only the nervous system ⋯.2)Hormones can affect not only life processes⋯..3)Researchers are looking for ways to decrease the dangers of ⋯.。
老托福阅读试题及答案:PASSAGE19为了帮助大家备考托福阅读,提高成绩,下面小编给大家带来老托福阅读真题及答案:passage 19,希望大家喜欢!老托福阅读试题及答案:PASSAGE 19The principal difference between urban growth in Europe and in the North American colonies was the slow evolution of cities in the former and their rapid growth in the latter. In Europe they grew over a period of centuries from town economies to their present urban structure. In North America, they started as wilderness communities and developed to mature urbanism in little more than a century.In the early colonial days in North America, small cities sprang up along the Atlantic Coastline, mostly in what are now New England and Middle Atlantic states in the United States and in the lower Saint Lawrence valley in Canada. This was natural because these areas were nearest to England and France, particularly England, from which most capital goods (assets such as equipment) and many consumer goods were imported. Merchandising establishments were, accordingly, advantageously located in port cities from which goods could be readily distributed to interior settlements. Here, too, were the favored locations for processing raw materials prior to export. Boston, Philadelphia, New York, Montreal, and other cities flourished, and, as the colonies grew, these cities increased in importance.This was less true in the colonial South, where life centered around large farms, known as plantations, rather than around towns, as was the case in the areas further north along the Atlantic coastline. The local isolation and the economic self-sufficiency of the plantations were antagonistic to the development of the towns. The plantations maintained their independence because they were located on navigable streams and each had a wharf accessible to the small shipping of that day. In fact, one of the strongest factors in the selection of plantation land was the desire to have its front on a water highway.When the United States became an independent nation in 1776, it did not have a single city as large as 50,000 inhabitants, but by 1820 it had a city of more than 10,000 people, and by 1880 it had recorded a city of over one million. It was not until after 1823, after the mechanization of the spinning had weaving industries, that cities started drawing young people away from farms. Such migration was particularly rapid following the Civil War (1861-1865).1. What does the passage mainly discuss?(A) Factors that slowed the growth of cities in Europe.(B) The evolution of cities in North America(C) Trade between North American and European cities(D) The effects of the United Sates' independence on urban growth in New England.2. The word "they" in line 4 refers to(A) North American colonies(B) cities(C) centuries(D) town economies3. The passage compares early European and North American cities on the basis of which of the following?(A) Their economic success(B) The type of merchandise they exported(C) Their ability to distribute goods to interior settlements(D) The pace of their development4. The word "accordingly" in line 11 is closest in meaning to(A) as usual(B) in contrast(C) to some degree(D) for that reason5. According to the passage , early colonial cities were established along the Atlantic coastline of North America due to(A) an abundance of natural resources(B) financial support from colonial governments(C) proximity to parts of Europe(D) a favorable climate6. The passage indicates that during colonial times, the Atlantic coastline cities prepared which of the following for shipment to Europe?(A) Manufacturing equipment(B) Capital goods(C) Consumer goods(D) Raw materials7. According to the passage , all of the following aspects of the plantation system influenced the growth of southern cities EXCEPT the(A) location of the plantations(B) access of plantation owners to shipping(C) relationships between plantation residents and city residents(D) economic self-sufficiency of the plantations8. It can be inferred from the passage that, in comparison with northern cities, most southern cities were(A) more prosperous(B) smaller(C) less economically self-sufficient(D) tied less closely to England than to France9. The word "recorded" in line 26 is closest in meaning to(A) imagined(B) discovered(C) documented(D) planned10. The word "drawing" in line 28 is closest in meaning to(A) attracting(B) employing(C) instructing(D) representing11. The passage mentions the period following the Civil War (line 29) because it was a time of(A) significant obstacles to industrial growth(B) decreased dependence on foreign trade(C) increased numbers of people leaving employment on farms(D) increased migration from northern states to southern states正确答案: BBDDC DCBCA C提升托福阅读能力的方法有哪些?方法一:概括地观察在练习时我们会读一些文章或者段子,首先我们可以进行略读。
2019年托福阅读复习模拟练习题及答案解析一托福阅读原文Research has shown that certain mineralsare required by plants for normal growth and development. The soil is thesource of these minerals, which are absorbed by the plant with the water fromthe soil. Even nitrogen, which is a gas in its elemental state, is normallyabsorbed from the soil as nitrate ions. Some soils are notoriously deficient inmicro nutrients and are therefore unable to support most plant life. So-calledserpentine soils, for example, are deficient in calcium, and only plants ableto tolerate low levels of this mineral can survive. In modern agriculture,mineral depletionof soils is a major concern, since harvesting cropsinterrupts the recycling of nutrients back to the soil.Mineral deficiencies can often be detectedby specific symptoms such as chlorosis (loss of chlorophyll resulting in yellowor white leaf tissue), necrosis (isolated dead patches), anthocyanin formation(development of deep red pigmentation of leaves or stem), stunted growth, anddevelopment of woodytissue in an herbaceous plant. Soils are most commonlydeficient in nitrogen and phosphorus. Nitrogen-deficient plants exhibit many ofthe symptoms just described. Leaves develop chlorosis; stems are short andslender, and anthocyanin discoloration occurs on stems, petioles, and lowerleaf surfaces. Phosphorus-deficient plants are often stunted, with leavesturning a characteristic dark green,often with the accumulation ofanthocyanin. Typically, older leaves are affected first as the phosphorus ismobilized toyoung growing tissue. Iron deficiency is characterized bychlorosis between veins in young leaves.Much of the research on nutrientdeficiencies is based on growing plants hydroponically, that is, in soillessliquid nutrient solutions. This technique allows researchers to createsolutions that selectively omit certain nutrients and then observe theresulting effects on the plants. Hydroponics has applications beyond basicresearch, since it facilitatesthe growing of greenhouse vegetables duringwinter. Aeroponics, a technique in which plants are suspended and the rootsmisted with a nutrient solution, is another method for growingplants withoutsoil.While mineral deficiencies can limit thegrowth of plants, an overabundance of certain minerals can be toxic and canalso limit growth. Saline soils, which have high concentrations of sodiumchloride and other salts, limit plant growth, and research continues to focuson developing salt-tolerantvarieties of agricultural crops. Research hasfocused on the toxic effects of heavy metals such as lead, cadmium,mercury,and aluminum; however, even copper and zinc, whichare essential elements, canbecome toxic in high concentrations. Although most plants cannot survive inthese soils, certain plants have the ability to tolerate highlevels of theseminerals.Scientists have known for some time thatcertain plants, called hyper accumulators, can concentrate minerals at levels ahundredfold or greater than normal. A survey of known hyper accumulatorsidentified that 75 percent of them amassed nickel, cobalt, copper, zinc,manganese, lead, and cadmium are otherminerals of choice. Hyper accumulatorsrun the entire range of the plant world. They may be herbs, shrubs, or trees.Many members of the mustard family, spurge family, legumefamily,and grass family are top hyper accumulators. Many are found in tropical andsubtropical areas of the world, where accumulation of high concentrations ofmetals may afford some protection against plant-eating insects and microbial pathogens.Only recently have investigators consideredusing these plants to clean up soil and waste sites that have been contaminatedby toxic levels of heavy metals–an environmentally friendly approach known asphytoremediation. This scenario begins with the planting of hyper accumulatingspecies in the target area, such as an abandoned mine or an irrigation pondcontaminated by runoff. Toxic minerals would first be absorbed by roots butlater relocated to the stem and leaves. A harvest of the shoots would removethe toxic compounds off site to be burned or composted to recover the metal forindustrial uses. After several years of cultivation and harvest, the site wouldbe restored at a cost much lower than the price of excavation and reburial, thestandard practice for remediation of contaminated soils. For examples, in fieldtrials, the plant alpine pennycress removed zinc and cadmium from soils near azinc smelter, and Indian mustard, native to Pakistan and India, has beeneffective in reducing levels of selenium salts by 50 percent in contaminatedsoils.托福阅读试题1. According to paragraph 1, what is trueof plants that can grow in serpentine soil?A.They absorb micronutrients unusuallywell.B.They require far less calcium than mostplants do.C.They are able to absorb nitrogen in itselemental state.D.They are typically crops raised for food.2. The word “exhibit”in the passage(paragraph 2) is closest in meaning toA. fight offB. showC.causeD.spread3. According to paragraph 2, which of thefollowing symptoms occurs in phosphorus-deficient plants but not in plantsdeficient in nitrogen or iron?A.Chlorosis on leavesB.Change in leaf pigmentation to a darkshade of greenC.Short, stunted appearance of stemsD.Reddish pigmentation on the leaves orstem4. According to paragraph 2, a symptom ofiron deficiency is thepresence in young leaves ofA.deep red discoloration between the veinsB.white or yellow tissue between the veinsC.dead spots between the veinsD.characteristic dark green veins5. The word “facilitates”in the passage(paragraph 3) is closest in meaning toA.slows downB. affectsC. makes easierD. focuses on6. According to paragraph 3, what is theadvantage of hydroponics forresearch on nutrient deficiencies in plants?A.It allows researchers to control whatnutrients a plant receives.B.It allows researchers to observe thegrowth of a large number of plants simultaneously.C.It is possible to directly observe theroots of plants.D.It is unnecessary to keep misting plantswith nutrient solutions.7. The word “suspended”in the passage(paragraph 3) is closest in meaning toA.grownB.protectedC.spread outD.hung8. Why does the author mention “herbs”, “shrubs”,and “trees”? (paragraph 5)A.To provide examples of plant types thatcannot tolerate high levels of harmful minerals.B.To show why so many plants are hyperaccumulators.C.To help explain why hyper accumulatorscan be found in so many different places.D.To emphasize that hyper accumulatorsoccur in a wide range of plant types.9. The word “afford”in the passage(paragraph 5) is closest in meaning toA.offerB.preventC.increaseD.remove10. Which of the sentences below bestexpresses the essential information in the highlighted sentence in the passage(paragraph 6)? Incorrect choices change the meaning in important ways or leaveout essential information.A.Before considering phytoremediation, hyperaccumulating species of plants local to the target area must be identified.B.The investigation begins with anevaluation of toxic sites in the target area to determine the extent ofcontamination.C.The first step in phytoremediation is theplanting of hyper accumulating plants in the area to be cleaned up.D.Mines and irrigation ponds can be keptfrom becoming contaminated by planting hyper accumulating species in targetedareas.11. It can be inferred from paragraph6 thatcompared with standard practices for remediation of contaminatedsoils,phytoremediationA.does not allow for the use of the removedminerals for industrial purposesB.can be faster to implementC.is equally friendly to the environmentD.is less suitable for soils that need tobe used within a short period of time12. Why doe s the author mention “Indianmustard”? (paragraph 6)A.To warn about possible risks involved inphytoremediationB.To help illustrate the potential of phytoremediationC.To show that hyper accumulating plantsgrow in many regions of the worldD.To explain how zinc contamination can bereduced13. Look at the four squares [■]that indicate where the following sentence could be added to the passage.Certainminerals are more likely to be accumulated in large quantities than others.Scientists have known for some time thatcertain plants, called hyper accumulators, can concentrate minerals at levels ahundredfold or greater than normal. ■ 【A】A survey ofknown hyper accumulators identified that 75 percent of them amassed nickel,cobalt, copper, zinc, manganese, lead, and cadmium are other minerals ofchoice. ■ 【B】Hyper accumulators run the entire range of the plant world. ■ 【C】They may beherbs, shrubs, or trees. ■ 【D】Many members of the mustard family, spurge family, legumefamily, and grass family are top hyper accumulators. Many are found in tropicaland subtropical areas of the world, where accumulation of high concentrationsof metals may afford some protection against plant-eating insects and microbialpathogens.Where could the sentence best fit?14. Directions: An introductory sentencefor a brief summary of the passage is provided below. Complete the summary byselecting the THREE answer choices that express the most important ideas in thepassage. Some answer choices do not belong in the summary because they expressideas that are not presented in the passage or are minor ideas in the passage.This question is worth 2 points.Plants need to absorb certain minerals fromthe soil in adequate quantities for normal growth and development.A.Some plants are able to accumulateextremely highlevels of certain minerals and thus can be used to clean upsoils contaminated with toxic levels of these minerals.B.Though beneficial in lower levels, highlevels of salts, other minerals, and heavy metals can be harmful to plants.C.When plants do not absorb sufficientamounts ofessential minerals, characteristic abnormalities result.D.Because high concentrations of sodiumchloride andother salts limit growth in most plants, much research has beendone in an effort to develop salt-tolerant agricultural crops.E.Some plants can tolerate comparativelylow levels of certain minerals, but such plants are of little use for recyclingnutrients back into depleted soils.F.Mineral deficiencies in many plants canbe cured by misting their roots with a nutrient solution or bytransferring theplants to a soilless nutrient solution.托福阅读答案1. 以serpentine soil做关键词定位至倒数第二句,这种土壤钙质缺乏,只有对钙要求很低的植物能够生存。
2019年托福阅读复习模拟练习及答案解析三托福阅读原文Two species of deer have been prevalent inthe PugetSound area of Washington State in the Pacific Northwest ofthe UnitedStates. The black-tailed deer, a lowland, west-side cousin of the mule deer ofeastern Washington, is now the most common. The other species, the Columbianwhite-tailed deer, in earlier times was common in the open prairie country; itisnow restricted to the low, marshy islands and flood plains along the lowerColumbia River.Nearly any kind of plant of the forestunderstory can be part of a deer's diet. Where the forest inhibits the growthof grass and other meadow plants, the black-tailed deer browses on huckleberry,salal, dogwood, and almost any other shrub or herb. But this is fair-weatherfeeding. What keeps the black-tailed deer alive in the harsher seasons of plantdecay and dormancy? One compensation for not hibernating is the built-in urgeto migrate. Deer may move from high-elevation browse areas in summer down to thelowland areas in late fall. Even with snow on the ground, the high bushyunderstory is exposed; also snow and wind bring down leafy branches of cedar,hemlock, red alder, and other arboreal fodder.The numbers of deer have fluctuatedmarkedly since the entry of Europeans into Puget Sound country. Theearlyexplorers and settlers told of abundant deer in theearly 1800s and yet almostin the same breath bemoaned thelack of this succulent game animal. Famousexplorers of thenorth American frontier, Lewis and Clark arrived at the mouthof the Columbia River on November 14, 1805, in nearly starved circumstances.They had experienced great difficulty finding game west of the Rockies and notuntil the second of December did they kill their first elk. To keep 40 peoplealive that winter, they consumed approximately 150 elk and 20 deer. And whengame moved out of the lowlands in early spring, the expedition decided toreturn east rather than face possible starvation. Later on in the early yearsof the nineteenth century, when Fort Vancouver became the headquarters of theHudson's Bay Company, deer populations continued to fluctuate. David Douglas,Scottish botanical explorer of the 1830s, found a disturbing change in theanimal life around the fort during the period between his firstvisit in 1825and his final contact with the fort in 1832. A recent Douglas biographerstates:" The deer which once picturesquely dotted the meadows around thefort were gone [in 1832], hunted to extermination in order to protect the crops."Reduction in numbers of game should haveboded ill for their survival in later times. A worsening of the plight of deerwas to be expected as settlers encroached on the land, logging, burning, andclearing, eventually replacing a wilderness landscape with roads, cities,towns, and factories. No doubt the numbers of deer declined still further.Recall the fate of the Columbian white-tailed deer, now in a protected status.But for the black-tailed deer, human pressure has had just the opposite effect.Wildlife zoologist Helmut Buechner(1953), in reviewing the nature of bioticchanges in Washington through recorded time, says that"since the early1940s, the state has had more deer than atany other time in its history, thewinter populationfluctuating around approximately 320,000 deer (mule andblack-tailed deer), which will yield about 65,000 of either sex and any ageannually for an indefinite period."The causes of this population rebound areconsequences of other human actions. First, the major predators of deer—wolves,cougar, and lynx—have been greatly reduced in numbers. Second, conservation hasbeen insured by limiting times forand types of hunting. But the most profoundreason for the restoration of high population numbers has been the fate of theforests. Great tracts of lowland country deforested by logging, fire, or bothhave become ideal feeding grounds of deer. In addition to finding an increaseof suitable browse,like huckleberry and vine maple, Arthur Einarsen, longtimegame biologist in the Pacific Northwest, foundquality of browse in the openareas to be substantially more nutritive. The protein content of shade-grownvegetation, for example, was much lower than that for plants grown inclearings.托福阅读试题1.According to paragraph 1, which of thefollowing istrue of the white-tailed deer of Puget Sound?A.mity is native to lowlands and marshes.B.it is more closely related to the muledeer of eastern Washington than to other types of deer.C.hits has replaced the black-tailed deerin the open prairie.D.It no longer lives in a particular typeof habitat that it once occupied.2.It can be inferred from the discussion inparagraph 2 that winter conditionsA.cause some deer to hibernateB.make food unavailable in the highlandsfor deerC.make it easier for deer to locateunderstory plantsD.prevent deer from migrating during thewinter3.The word "inhibits" in thepassage (paragraph 2) is closest in meaning toA.consists ofbinesC.restrictsD.establishes4.The phrase "in the same breath"in the passage (paragraph 3) is closest in meaning toA.impatientlyB.humorouslyC.continuouslyD.immediately5.The author tells the story of theexplorers Lewis and Clark in paragraph 3 in order to illustratewhich of thefollowing points?A.The number of deer within the Puget Soundregion has varied over time.B.Most of the explorers who came to thePuget Sound area were primarily interested in hunting game.C.There was more game for hunting in theEast of the United States than in the West.D.Individual explorers were not assuccessful at locating games as were the trading companies.6.According to paragraph 3, how had FortVancouver changed by the time David Douglas returnedin 1832?A.The fort had become the headquarters forthe Hudson's Bay Company.B.Deer had begun populating the meadowsaround the fort.C.Deer populations near the fort had beendestroyed.D.Crop yields in the area around the forthad decreased.7.Why does the author ask readers to recall“the fate of the Columbian white-tailed deer” (paragraph 4) in the discussionof changes in the wilderness landscape?A.To provide support for the idea thathabitat destruction would lead to population declineB.To compare how two species of deer causedbiotic changes in the wilderness environmentC.To provide an example of a species ofdeer that has successfully adapted to human settlementD.To argue that some deer species must begiven a protected status8.The phrase “indefinite period” in thepassage (paragraph 4) is closest in meaning to periodA.whose end has not been determinedB.that does not begin when expectedC. that lasts only brieflyD.whose importance remains unknown9.Which of the following statements aboutdeer populations is supported by the information in paragraph 4?A.Deer populations reached their highestpoint during the 1940s and then began to decline.B.The activities of settlers contributed inunexpected ways to the growth of some deer populations in later times.C.The cleaning of wilderness land forconstruction caused biotic changes from which the black-tailed deer populationhas never recovered.D.Since the 1940s the winter populations ofdeer have fluctuated more than the summer populations have.10.The word “rebound” in the passage(paragraph 5) s closest in meaning toA.declineB. recoveryC. exchangeD.movement11.Which of the sentences below bestexpresses the essential information in the highlighted sentence in the passage(paragraph 5) ? Incorrect choices change the meaningin important ways or leaveout essential information.A.Arthur Einarsen’s longtime f amily withthe Pacific Northwest helped him discover areas where deer had anincrease insuitable browse.B.Arthur Einarsen found that deforestedfeeding grounds provided deer with more and better food.C.Biologist like Einarsen believe it isimportant to find additional open areas with suitable browse for deer toinhabit.D.According to Einarsen, huckleberry andvine maple are examples of vegetation that may someday improve the nutrition ofdeer in the open areas of the Pacific Northwest.12.Which of the following is NOT mentionedin paragraph 5 as a factor that has increased deer populations?A.A reduction in the number of predatorsB.Restrictions on huntingC.The effects of logging and firews that protected feeding grounds ofdeer13. Look at the four squares [█] thatindicate where the following sentence could be added to the passage. Therefoodis available and accessible throughout the winter.Nearly any kind of plant of the forestunderstory can be part of a deer's diet. Where the forest inhibits the growthof grass and other meadow plants, the black-tailed deer browses on huckleberry,salal, dogwood, and almost any other shrub or herb. But this is fair-weatherfeeding. What keeps the black-tailed deer alive in the harsher seasons of plantdecay and dormancy? One compensation for not hibernating is the built-in urgeto migrate. █【A】Deer may move from high-elevation browse areas in summer down to thelowland areas in late fall. █【B】Even with snow on the ground, the high bushy understory is exposed;also snow and wind bring down leafy branches of cedar, hemlock, red alder, andother arboreal fodder.█【C】The numbers of deer have fluctuated markedly since the entry ofEuropeans into Puget Sound country. █【D】The earlyexplorers and settlers told of abundant deer in the early 1800s and yet almostin the same breath bemoaned the lack of this succulent game animal. Famous explorersof the north American frontier, Lewis and Clark arrived at the mouth of theColumbia River on November 14, 1805, in nearly starved circumstances. They hadexperienced great difficulty finding game west of the Rockies and not until thesecond of December did they kill their first elk. To keep 40 people alive that winter,they consumed approximately 150 elk and 20 deer. And when game moved out of thelowlands in early spring, the expedition decided to return east rather than facepossible starvation. Later on in the early years of the nineteenth century,when Fort Vancouver became the headquarters of the Hudson's Bay Company, deerpopulations continued to fluctuate. DavidDouglas, Scottish botanical explorerof the 1830s, founda disturbing change in the animal life around the fortduring the period between his first visit in 1825 and his final contact withthe fort in 1832. A recent Douglas biographer states:" The deer which oncepicturesquely dotted the meadows around the fort were gone [in1832], hunted toextermination in order to protect the crops."Where would the sentence best fit?14. Directions: An introductory sentencefor a brief summary of the passage is provided below. Complete the summary byselecting the THREE answer that express the most important ideas in thepassage. Some sentences do not belongin the summary because they express ideasthat not presentedin the passage or are minor ideas in the passage. This question is worth 2 points.Deer in the Puget Sound area eat a widevariety of foods and migrate seasonally to find food.A.The balance of deer species in the PugetSound region has changed over time, with the Columbian white-tailed deer nowoutnumbering other types of deer.B.Deer populations naturally fluctuate, butearlysettlers in the Puget Sound environment caused an overall decline in thedeer populations of the areas at that time.C. In the long term, black-tailed deer inthe Puget Sound area have benefitted from human activities through theelimination of their natural predators, and more andbetter food in deforestedareas.D.Because Puget Sound deer migrate, it wasand still remains difficult to determine accurately how many deer are living atany one time in the western United States.E.Although it was believed that humansettlement of the American West would cause the total number of deer todecrease permanently, the opposite has occurred for certain types of deer.F.Wildlifebiologists have long been concerned that the loss of forests may createnutritional deficiencies for deer.托福阅读答案1.以White-tailed deer做关键词定位至最后一句,说白尾鹿过去是什么什么地方的,现在是什么什么地方的,也就是它们的生活环境发生了变化,所以D不再在原来的地方生活准确,其他的都没说2.以winter condition做关键词,没有,但最后一句有windand snow on the ground,就是指冬天了,读这句话,说understory会暴露,understory指的是林下植被,而且还说风会把blabla吹开,所以既然挡在上面的东西都被吹走了,结果是林下植被露出地面,前文又说any plant of林下植被都是鹿的食物,所以答案C准确。
2019托福阅读:模拟试题及答案解析(1)2019托福阅读:模拟试题及答案解析(1)【托福】托福阅读原文Protection of Plants by Insects【1】Many plants - one or more species of at least68 different families - can secrete nectar even whenthey have no blossoms, because they bear extrafloral nectaries (structures that producenectar) on stems, leaves, leaf stems, or other structures.These plants usually occur where antsare abundant, most in the tropics but some in temperate areas. Among those of northeasternNorth America are various plums, cherries, roses, hawthorns, poplars, and oaks. Like floralnectar, extrafloral nectar consists mainly of water with a high content of dissolved sugars and, in some plants, small amounts of amino acids. The extrafloral nectaries of some plants areknown to attract ants and other insects, but the evolutionary history of most plants with thesenectaries is unknown. Nevertheless, most ecologists believe that all extrafloral nectaries attractinsects that will defend the plant.【2】Ants are portably the most frequent and certainly the most persistent defenders ofplants. Since the highly active worker ants require a great deal of energy, plants exploit thisneed by providing extrafloral nectar that supplies ants with abundant energy. To return thisfavor, ants guard the nectaries, driving away or killing intruding insects that might competewith ants for nectar. Many of theseintruders are herbivorous and would eat the leaves of theplants.【3】Biologists once thought that secretion ofextrafloral nectar has some purely internalphysiological function, and that ants provide no benefit whatsoever to the plants that secreteit. This view and the opposing “protectionist” hypothesis that ants defend plants had beendisputed for over a hundred years when, in 1910, a skeptical William Morton Wheelercommented on the controversy. He called for proof of the protectionist view:that visitations ofthe ants confer protection on the plants and that in the absence of the insects a much greaternumber would perish or fail to produce flowers or seeds than when the insects are present. That we now have an abundance of the proof that was called for was established whenBarbara Bentley reviewed the relevant evidence in 1977, and since then many moreobservations and experiments have provided still further proof that ants benefit plants.【4】One example shows how ants attracted to extrafloral nectaries protect morning gloriesagainst attacking insects. The principal insect enemies of the North American morning gloryfeed mainly on its flowers or fruits rather than its leaves. Grasshoppers feeding on flowersindirectly block pollination and the production of seeds by destroying the corolla or thestigma, which receives the pollen grains and on which the pollen germinates. Without theircolorful corolla, flowers do not attract pollinators and are not fertilized. An adult grasshoppercan consume a large corolla, about 2.5 inches long, in an hour. Caterpillars and seed beetlesaffect seed production directly. Caterpillars devour the ovaries,where the seeds are produced, and seed beetle larvae eat seeds as they burrow in developing fruits.【5】Extrafloral nectaries at the base of each sepal attractseveral kinds of insects, but 96 percent of them are ants, several different species of them. When buds are still small, lessthan a quarter of an inch long, the sepal nectaries are already present and producing nectar. They continue to do so as the flower develops and while the fruit matures. Observations leavelittle doubt that ants protect morning glory flowers and fruits from the combined enemy forceof grasshoppers, caterpillars, and seed beetles. Bentley compares the seed production of sixplants that grew where there were no ants with that of seventeen plants that were occupied byants. Unprotected plants bore only 45 seeds per plant, but plants occupied by ants bore 211 seeds per plant. Although ants are not big enough to kill or seriously injure grasshoppers, theydrive them away by nipping at their feet. Seed beetles are more vulnerable because they aremuch smaller than grasshoppers. The ants prey on the adult beetles,disturb females astheylay their eggs on developing fruits, and eat many of the eggs they do manage to lay.托福阅读试题1.According to paragraph 1,floral nectar andextrafloral nectar are alike in thatA.they are likely to be produced by the same plants.B.they basically consist of the same chemicalcomponents.C.they attract only insects that will defend the plant.D.they are produced by the same parts of the plant.2.To say that ants are "persistent" defenders of plants means thatA.they defend plants against a wide variety of threats.B.they continue to defend plants for as long as the plants are threatened.C.they are successful defenders of plants.D.they are easily observable defenders of plants.3.What can be inferred from paragraph 2 about the ants that are attracted to theextrafloral nectaries?A.They do not eat the leaves of the plants that produce extrafloral nectar.B.They live almost entirely on extrafloral nectar.C.They spend most of their energy guarding extrafloral nectaries.D.They frequently fight among themselves overextrafloral nectar.4.According to paragraph 3, what was the position of the opponents of the"protectionist" hypothesis?A.Extrafloral nectar provides plants with a direct defense against attack by insects.B.Ants substantially benefit plants that secrete extrafloral nectar.C.The secretion of extrafloral nectar plays a role in the plant’s internal functioning.D.Ants visit plants that secrete extrafloral nectar as often as they visit plants that do not.5.The word "skeptical" in the passage is closest in meaning toA.curious.B.doubtful.C.open-minded.D.practical.6.Which of the sentences below best expresses the essential information jn thehighlighted sentence in the passage Incorrect choices change the meaning inimportant ways or leave out essential information.A.We now have ample proof that ants benefit plants.B.Barbara Bentley has called for additional proof that ants benefit plants.C.In 1977 Barbara Bentley conducted research that proved that all prior studies were wrong.D.Proof that ants benefit plants will require many more observations and experiments.7.According to paragraph 4, what effect does the destruction of the corolla have onplants.A.It leaves the seeds exposed and unprotected.B.It prevents the stigma from developing.C.It keeps pollen grains from attaching properly.D.It prevents the flower from attracting pollinators.8.The word "devour" in the passage is closest in meaning toA.attack.B.eat.C.damage.D.prefer.9.What role does paragraph 5 play in the passage?A.It offers various kinds of evidence for the protectionist view.B.It presents the study that first proved that ants benefit plants.C.It explains how insects find sources of nectar.D.It presents information that partly contradicts the protectionist view.10.The word "vulnerable" in the passage is closest in meaning toA.numerous.B.harmful.C.open to attack.D.difficult to locate.11.According to paragraph 5, what did Bentley’s comparative study show?A.Many more plants grew in places where ants werepresent than where they were absent.B.The ants preferred plants with low seed production to plants with high seed production.C.The plants occupied by ants produced many more seeds than those that were not occupiedby ants.D.The plants that grew in places without ants were much smaller and weaker than those thatgrew in places where ants were present.12.According to paragraph 5, ants defend morning glory plants from seed beetles ineach of the following ways EXCEPT:A.driving adult beetles off the plants by nipping attheir feet.B.catching and eating adult beetles.C.eating beetle eggs they find on developing fruits.D.making it difficult for beetles to lay eggs on developing fruits.13. Look at the four squares [■] that indicate wherethe following sentence could beadded to the passage. Where would the sentence best fit? Sometimes they capture theinsects to feed their protein-hungry larvae.Ants are portably the most frequent and certainly the most persistent defenders of plants. ■【A】 Since the highly active worker ants require a great deal of energy, plants exploit thisneed by providing extrafloral nectar thatsupplies ants with abundant energy. ■【B】T oreturn this favor, ants guard the nectaries, driving away or killing intrudinginsects that mightcompete with ants for nectar. ■【C】 Many of these intruders are herbivorous and wouldeatthe leaves of the plants. ■【D】14. Directions:An introductory sentence for a brief summary of the passage of thepassage is provided below. Complete the summary by selecting the THREE answerchoices that express the most important ideas in the passage. Some answer choicesdo not belong in the summary because they express ideas that are not presented inthe passage or are minor ideas in the passage. This questions is worth 2 points.Many plants have extrafloral nectaries that produce nectar even during periods inwhich the plant is not flowering.A.Evolutionary history shows that plants that produce extrafloral nectar originated in thetropics.B.Extrafloral nectar has a higher concentration of sugar than floral nectar and is moreattractive to ants and other insects.C.The protectionist hypothesis is that extrafloralnextar attracts ants, and that the ants, inorder to preserve this energy-rich food source, attack insects that might harm the plant.D.Evidence accumulated during the twentieth century proved that ants provide significantbenefits for plants with extrafloral nectaries.E.Research has shown that American morning glory plants that are protected by ants producesignificantly more seeds than morning glory plants that are not protected by ants.F.Ants generally ignore small insects, but they will eat the adults of large insect species aswell as their eggs and larvae.托福阅读答案1.B2.B3.A4.D5.A6.A7.C8.B9.B10.C11.C12.A13.C14.CDE。
2019年托福阅读真题解析:鸟类配偶选择今天阅读三篇文章是Reconstructing Prehistoric Human Lifestyle(重建史前人类的生活方式),How Soil is Formed(泥土如何形成)和Mate Choice In Birds(鸟类配偶选择)。
分别重复2015.09.17第一篇,2014.07.12第二篇,和2015.10.24第三篇,是典型的老题拼盘重复。
三篇文章,集合了人类考古、地质和生物学三个常见话题,专业词汇泛滥,长难句增多,篇章结构的整体性增强。
下面,给出今天第三篇文章的知识框架和词汇串讲。
第三篇 Mate Choice In Birds(鸟类配偶选择)第1段:与雌鸟相比,雄鸟在羽毛(plumage)和体型上彼此差别很大(引出话题)。
达尔文认为这是雄鸟针对雌鸟的配偶竞争(mate competition)导致的。
伴随着繁殖成功,这些导致繁殖成功的特定性状(specific traits)也流传于后代,如硕大体型、花哨俏丽的羽毛(fancy plumage)、复杂婉转的歌声(intricate songs)和惊艳的表演(striking displays)。
虽然达尔文对于雄鸟配偶竞争的理论被认可,但现实中雄鸟的竞争,雌鸟对于雄鸟的选择,以及配偶之外的资源竞争以更加错综复杂的关系相连。
第2段:配偶对象之间的相互评估(mutual assessment)对求偶成功起着重要作用。
雄性的装饰炫耀(the ornaments and displays)能够表明它所处的优越状态,进而吸引雌性选择自己作为伴侣。
雌性钟爱能够长时间表演的雄性,这说明它们有更多的脂肪储备,所以有水平和自己产下更多的后代(descendant/offspring)。
第3段:为什么雌性会选择羽毛鲜艳和长时间表演的雄性?科学家提出优秀基因假说(good-genes hypotheses)解释这个现象。
2019年6月1日托福阅读考试真题及答案
上周的托福考试已经顺利结束,参加考试的考生对答案肯定很关注。
接下来就和看一看2019年6月1日托福阅读考试真题及答案。
Passage 1 Megafauna Extinctions in Ancient Australia古澳大利亚大型哺乳动物的灭绝
(重复2018.12.01)
话题重复2018.03.11 The Australian Megafauna Extinctions。
生物史上大型动物的灭绝在各个地方情况有所不同。
而究其灭绝原因,科学家提出了两种说法,一是climate,一是认为hunt。
Passage 2 The Formation of Early Earth早期地球的形成(首考新题)
Passage 3 Colonial America and the Navigation Acts 殖民时期的美国和航海法案(重复2015.03.07)
先讲了早期英国殖民者对美洲的殖民引起了一些不满,因为收税过高且限制他们的一些产品与英国竞争。
后面着重讲其实这种殖民统治也对美国经济有好处,如帮他们买产品到欧洲,有英国海军保护等。
最后说美国农民虽然参与市场经济,但前提还是满足自己,所以也会通过生产来和别人换。
Passage 4 Mexican Mural Art墨西哥壁画艺术
(重复2015.09.19)
第一段:壁画艺术出现及原因分析。
墨西哥壁画艺术的主题主要涉及社会政治问题,伴随呼唤打破以欧洲为中心的文化依赖,寻求真正的自我表达的艺术形式,这是拉美第一个现代艺术运动,影响深远。
该艺术的出现紧跟在墨西哥革命之后,原因是多样的:1.受到革命乐观主义的影响;2.文化上追求突破欧洲为中心的传统,去寻找艺术的自由表达尝试;3.由一批成熟有力的艺术家领导;4.收到有远见的教育部长的支持,拨钱拨场地给艺术家去使用。
第二段:风格定性。
艺术家的共同信仰:墨西哥壁画艺术家都相信艺术的力量去改造成为一个更好的社会、去挑战陈规旧习、去丰富
国民的文化生活;现代性:该艺术也是现代的,因为其创作目的是去挑战老旧传统;大众性:该艺术还是一种平易近人的大众艺术,是为了教育启蒙大众,尤其是工人阶级。
第三段:内部分裂。
然而墨西哥壁画艺术并非一次艺术家的团结统一运动,艺术家的发展方向各不相同ra寻求和利用墨西哥过去的文化遗产来展现多元视角,努力去创造一种属于墨西哥的新的美学语言,他深受本土绘画传统影响,想发展出一种与之对应的现代绘画语言,像书籍一样可以交流思想;co比较悲观,认为墨西哥的过去是粗野未开化,现在的革命被腐败和残忍腐蚀,他的画采用进攻性的表达技法,是墨西哥残酷而矛盾现实的比喻;eiros是三人中最政治活跃的,是一个国际主义者,他避免使用传统颜料和技法,采用现代工业原料和喷枪,他的作品面向共产主义者的未来,并经常使用碎片化的复杂意向使很多观众看不懂。
第四段:对各地的影响。
墨西哥壁画艺术影响了美国、欧洲和整个拉丁美洲。
诱发了美国各大城市的本土壁画艺术的出现;影响了西班牙画家毕加索创作出第一幅壁画作品,也几乎是他唯一的宣传艺术画;在拉丁美洲,无论什么时候,只要艺术家感觉需要使用自己的绘画语言做出清晰的公开宣言时,这种受墨西哥影响的壁画艺术就会反复出现。
Passage 5 Control of the Seas 海洋的控制
(重复2018.10.27)
Passage 6 Turbidity Currents 浊流
(重复2017.12.16,2018.10.28)
沉淀物沿着海中的大陆架和斜坡最后沉淀在海底。
涡轮效应可以使海底的沉淀物缓慢运动而不受海面波涛的影响。
沉淀物混合着洋流越来越浑浊,速度也变慢。
地震是起始因素,导致海底大陆架崩解,形成涡轮效应。
最后给了一个海底电缆的例子来证明这个效应导致的结果。
Passage 7 Mating Songs of Frogs 青蛙的交配叫声
(重复2018.10.28,2015.09.13)
第1段:声音信号相对于视觉信号的优势:声音信号对于接收者来说不需要处在特定方位上(particular orientation);声音信号能够绕开障碍物(travel around large obstacles),声音信号可以在晚间光线弱时仍然有效使用,而青蛙交配通常都是在夜晚黑暗时,所以青蛙选择声音信号用于寻找配偶。
第2段:声音信号的功用:青蛙的叫声可以是求偶(courtship),也可以是表明进攻(aggressiveness),这两种叫声是不一样的。
只有求偶叫声才能得到母蛙的回应,回应方式有:母蛙朝向声源移动(moving toward the sound source);母蛙回唱与公蛙形成二重唱(perform duets)。
第3段:求偶叫声暴露的信息:公蛙叫声的振幅(amplitude),即叫声大小,会暴露公蛙的体型和年纪,年纪越大,体型越大,发声囊(vocal sacs)也会随之变大,发出的声音也会变大;母蛙一般喜欢年纪大的公蛙,因为它们能活这么久说明它们能够应对环境中的危险因素因此具备生存优势,受母蛙欢迎。
此外,叫声的大小也显示了发声的公蛙离母蛙的距离。
第4段:叫声的频率,或者叫音高(pitch),也能够显示出发声公蛙的年龄和体型,年龄大体型大的公蛙叫声低沉(lower pitched calls),母蛙以此向该叫声靠近,而年幼的小公蛙为了也能够吸引母蛙跑到寒冷的地方发声,因为寒冷可以使得青蛙的叫声变得低沉。
此外,叫声时间长短显示了雄蛙的体力。
第5段:叫声频率和整体的时间模式,显示出青蛙的物种,帮助母蛙找到同种公蛙交配,防止不同种类的青蛙杂交,因为生出的杂种后代(hybrid offspring)往往不具备繁殖能力和存活能力。
第6段:公蛙叫声的复杂性会影响它们对母蛙的吸引力,例如某些公蛙在whines叫声后面加上chucks,这样会更吸引母蛙,但同时也吸引蝙蝠等捕猎者的注意。
Passage 8 Causes of Industrialization in the United States美国工业化的起源
(重复2016.06.04)
美国对于工业革命的各种促进手段,跟欧洲做对比,突出美国的情况之乐观。
首先,人数暴增,大量手工艺人流动,工业化技术生产更多商品。
其次,收入和供给的增加,满足了更多工业化需求。
最后,技术发展导致工业生产技术的进一步提高。
Passage 9 SnowPack 积雪的光线反射
(重复2018.12.01,为当日首考新题)
Snow Pack吸收长短波,有两类表现,其一是百分之百吸收,另一个是反射大于吸收。
举例说明树枝底下比较暖和的原因就在于小树森林比大树森林不容易融雪。
Passage 10 Atwater Food Energy Value System阿特沃特食物能量价值体系
(重复2018.11.10)
有个科学家建立了一个营养物质的系统,包括碳水化合物、蛋白质和脂类。
然后说脂类最好测量,因为要么是常温下固体要么是液体。
蛋白质的氮含量比较高所以也可以测量。
然后测量了在这三个物质在人体内的消化率。
这个系统后来被科学家不断地完善。
Passage 11 Centralized Societies:Archaeological Evidence 中央集权社会:考古证据
(重复2015.11.28)
Passage 12 Dynastic Egypt and the Nile River 埃及王朝与尼罗河
(重复2019.01.12,2018.01.06,2017.09.06,2017.05.20)
第一段:讲了埃及王朝的形成:撒哈拉沙漠曾经是一片绿洲,随着气候的变化逐渐沙漠化,由于撒哈拉的干旱导致人们被迫离开聚集到水源丰富的尼罗河畔,逐渐形成了村庄,城镇直至整个埃及王朝。
第二段:讲了埃及的经济基础为农业以及埃及通过其他方式增强国力:尼罗河4-10月受大西洋暖湿气流的影响,10-4月首来自非洲干燥季风的影响,孕育出了发达的河谷农业,随着农业的发展,政治、贸易制度逐步建立,埃及人利用尼罗河来进行商业活动以及建立大型建筑所需要的材料也通过此来运输。
第三段:讲了埃及王朝的繁荣与衰落:在6000BC时,埃及的一个王统一了上下埃及,形成了埃及王朝和各级官僚机构,来征税以及管理人口,随后建立了金字塔。
这个王朝绵延了数十个朝代,时间之长没有其他王朝可以相比,尽管中途有经历其他国家侵略,但次数不多,此外建立的长子继承制以及亚历山大大帝和后来的古罗马、拜占庭人对埃及并不感兴趣,使得国家整体发展平稳,当地的历史遗迹因此得到了良好的保存。
Passage 13 The Development of the Sumerian City State苏美尔城邦的发展
(加试)
Passage 14 Soil Salinization 土壤盐碱化
(加试)
Passage 15 Bat Diets 蝙蝠的饮食
(重复2017.04.23,2017.10.21,2018.11.24)
主要讲了各种不同的bats在饮食结构上的区别,吃的主要有insect,fruits,plants等等,介绍了一种部分bats拥有的获取昆虫的方法:利用回声,但是不是所有昆虫都能用这个方法。
比较了不同类型的bats的diet (big and small,the bats flying in the sky and the ones living and waiting nearby).。