托福阅读真题100篇原文+题目(二十九)
托福(toefl)考试阅读理解部分全真试题
托福(TOEFL)考试阅读理解部分全真试题Questions 1-11Before the 1500 s, the western plains of North America were dominated by farmers. One group, the Mandans, lived in the upper Missouri River country, primarily in present-day North Dakota. They had large village s of houses built close together. The tight arrangement enabled the Ma ndans to protect themselves more easily from the attacks of others who might seek to obtain some of the food these highly capable farmers sto red from one year to the next.The women had primary responsibility for the fields. They had to exerc ise considerable skill to produce the desired results, for their north ern location meant fleeting growing seasons. Winter often lingered; au tumn could be ushered in by severe frost. For good measure, during the spring and summer, drought, heat, hail, grasshoppers, and other frustr ations might await the wary grower.Under such conditions, Mandan women had to grow maize capable of weath ering adversity. They began as early as it appeared feasible to do so in the spring. clearing the land, using fire to clear stubble from the fields and then planting. From this point until the first green corn c ould be harvested, the crop required labor and vigilance.Harvesting proceeded in two stages. In August the Mandans picked a sma ller amount of the crop before it had matured fully. This green corn w as boiled, dried, and shelled, with some of the maize slated for immed iate consumption and the rest stored in animal-skin bags. Later in the fall, the people picked the rest of the corn. They saved the best of t he harvest for seeds or for trade, with the remainder eaten right away or stored for later use in underground reserves. With appropriate bank ing of the extra food, the Mandans protected themselves against the di saster of crop failure and accompanying hunger.The women planted another staple, squash, about the first of June, and harvested it near the time of the green corn harvest. After they picke d it, they sliced it, dried it, and strung the slices before they stor ed them. Once again, they saved the seed from the best of the year s c rop. The Mandans also grew sunflowers and tobacco; the latter was the particular task of the old men.1. The Mandans built their houses close together in order to(A) guard their supplies of food(B) protect themselves against the weather(C) allow more room for growing corn(D) share farming implements2.The word "enabled" in line 5 is closest in meaning to(A)covered(B) reminded(C)helped(D)isolated3.The word "considerable" in line 10 is closest in meaning to(A) planning(B) much(C) physical(D) flew4.Why does the author believe that the Mandans were skilled farmers?(A) They developed effective fertilizers.(B) They developed new varieties of corn.(C) They could grow crops in most types of soil.(D) They could grow crops despite adverse weather.5. Tile word "consumption" in line 25 is closest in meaning to(A) decay(B) planting(C) eating(D) conversion6.Which of the following processes does the author imply was done by b oth men and women?(A) Clearing fields(B) Planting corn(C) Harvesting corn(D) harvesting squash.7.The word "disaster" in line 31 is closest in meaning to(A)control(B)catastrophe(C)avoidance(D)history8. According to the passage, the Mandans preserved their food by(A)smoking(B)drying(C)freezing.(D)salting9.The word "it" in line 34 refers to(A)June(B)corn(C)time(D)squash10.Which of the following crops was cultivated primarily by men(A) Corn(B)Squash(C)Sunflower(D)Tobacco11.Throughout the passage, the author implies that the Mandans(A)planned for the future(B) valued individuality(C)were open to strangers(D)were very adventurousQuestions 12-20The elements other than hydrogen and helium exist in such small quanti ties that it is accurate to say that the universe somewhat more than 2 5 percent helium by weight and somewhat less than 25 percent hydrogen. Astronomers have measured the abundance of helium throughout our galax y and in other galaxies as well. Helium has been found In old stars, i n relatively young ones, in interstellar gas, and in the distant objec ts known as quasars. Helium nuclei have also been found to be constitu ents of cosmic rays that fall on the earth (cosmic "rays" are not real ly a form of radiation; they consist of rapidly moving particles of nu merous different kinds). It doesn t seem to make very much difference where the helium is found. Its relative abundance never seems to vary much. In some places, there may be slightly more of it; In others, sli ghtly less, but the ratio of helium to hydrogen nuclei always remains about the same.Helium is created in stars. In fact, nuclear reactions that convert hy drogen to helium are responsible for most of the energy that stars pro duce. However, the amount of helium that could have been produced in t his manner can be calculated, and it turns out to be no more than a fe w percent. The universe has not existed long enough for this figure to be significantly greater. Consequently, if the universe is somewhat mo re than 25 percent helium now, then it must have been about 25 percent helium at a time near the beginning.. However, when the universe was l ess than one minute old, no helium could have existed. Calculations in dicate that before this time temperatures were too high and particles of matter were moving around much too rapidly. It was only after the o ne-minute point that helium could exist.By this time, the universe had cooled sufficiently that neutrons and p rotons could stick together. But the nuclear reactions that led to the formation of helium went on for only a relatively short time. By the t ime the universe was a few minutes old, helium production had effectiv ely ceased.12.What does the passage mainly explain?(A)How stars produce energy(B)The difference between helium and hydrogen(C)When most of the helium in the universe was formed(D)Why hydrogen is abundant13.According to the passage, helium is(A) the second-most abundant element in the universe(B) difficult to detect(C) the oldest element in the universe(D) the most prevalent element in quasars14.The word "constituents" in line 9 is closest in meaning to(A) relatives(B) causes(C)components(D) targets15.Why does the author mention "cosmic rays t in line 10?(A)As part of a list of things containing helium(B)As an example of an unsolved astronomical puzzle(C) To explain how the universe began(D) To explain the abundance of hydrogen in the universe16.The word "vary" in line 14 is closest ill meaning to(A) mean(B) stretch(C) change(D) include17.The creation of helium within stars(A) cannot be measured(B) produces energy(C) produces hydrogen as a by-product(D) causes helium to be much more abundant In old stars than In young star:18. The word "calculated" in line 20 is closest in meaning to(A) ignored(B) converted(C) increased(D) determined19.Most of the helium in the universe was formed(A) in interstellar space(B) in a very short time(C)during the first minute of the universe s existence(D) before most of the hydrogen20.The word "ceased" in line 35 is closest in meaning to(A)extended(B)performed(C)taken hold(D)stoppedQuestions 21-30In colonial America, people generally covered their beds with decorati ve quilts resembling those of the lands from which the quitters had co me. Wealthy and socially prominent settlers made quilts of the English type, cut from large lengths of cloth of the same color and texture ra ther than stitched together from smaller pieces. They mad these until the advent of the Revolutionary War in I 775, when everything English came to be frowned upon.Among the whole-cloth quilts made by these wealthy settlers during the early period are those now called linsey- woolseys. This term was usually applied to a fabric of wool and linen used In heavy clothing and q uilted petticoats worn in the wintertime. Despite the name, linsey-woo lsey bedcovers did not often contain linen. Rather, they were made ofa top layer of woolen or glazed worsted wool fabric, consisting of smo oth, compact yarn from long wool fiber dyed dark blue, green, or brown with a bottom layer of a coarser woolen material, either natural or a shade of yellow. The filling was a soft layer of wool which had been c leaned and separated and the three layers were held together with deco rative stitching done with homespun linen thread. Later, cotton thread was used for this purpose. The design of the stitching was often a sim ple one composed of interlocking circles or crossed diagonal lines giv ing a diamond pattern.This type of heavy, warm, quilted bedcover was so large that it hung to the floor. The corners are cut out at the foot of the cover so that the quilt fit snugly around the tall four-poster, beds of the 1700 s, which differed from those of today in that they were shorter and wider; they were short because people slept in a semi-sitting position with m any bolsters or pillows, and wide, because each bed often slept threeor more. The linsey-woolsey covering was found in the colder regions of the country because of the warmth it afforded. There was no central heating and most bedrooms did not have fireplaces.21. What does this passage mainly discuss?(A) The processing of wool(B) Linsey-woolsey bedcovers(C) Sleeping habits of colonial Americans(D) Quilts made in England22. The word "prominent" in line 3 is closest in meaning to(A) isolated(B) concerned(C) generous(D) distinguished23.The author mention the Revolutionary War as a time period when(A) quills were supplied to the army(B) more immigrants arrived from England(C) quills imported from England became harder to find(D) people s attitudes toward England changed.24.The phrase "applied to" in line 11 is closest in meaning to(A) sewn onto(B) compared to(C) used for(D) written down on25.The term "linsey-woolsey" originally meant fabric used primarily in(A)quilts(B)sheets(C)clothing(D) pillows26.The word "coarser" in line 17 is closest in meaning to(A)older(B) less heavy(C)more attractive(D) rougher27.The quilts described in the second and third paragraphs were made p rimarily of(A) wool(B) linen(C) cotton(D) a mixture of fabrics28.It can be inferred from the third paragraph that the sleeping habit sof most Americans have changed since the 1700 s in all the following w ays EXCEPT(A) the position in which people sleep(B) the numbers of bolsters or pillows people sleep on(C) the length of time people sleep(D) the number of people who sleep in one bed29.The word "afforded" in line 33 is closest in meaning to(A) provided(B) spent(C) avoided(D) absorbed30.Which of the following was most likely to be found in a bedroom in the colder areas of the American colonies?(A)A linsey-woolsey(B)A vent from a central healing system(C)A fireplace(D)A wood stoveQuestions 31-40Growing tightly packed together and collectively weaving a dense canop y of branches, a stand of red alder trees can totally dominate a site to the exclusion of almost everything else. Certain species such as sa lmonberry and sword ferns have Line adapted to the limited sunlight da ppling through the canopy, but few evergreen trees (S) will survive th ere; still fewer can compete with the early prodigious growth of alder s. A Douglas fir tree reaches its maximum rate of growth ten years lat er than an alder, and if the two of them begin life at the same time, the alder quickly outgrows and dominates the Douglas fir. After an ald er canopy has closed, the Douglas fir suffers a marked decrease in gro wth, often dying within seven years. Even more shade-tolerant species of trees such as hemlock may remain badly suppressed beneath aggressiv e young alders.Companies engaged in intensive timber cropping naturally take a dim vi ew of alders suppressing more valuable evergreen trees. But times are changing; a new generation of foresters seems better prepared to Inclu de in their management plans consideration of the vital ecological rol e alders, play. Among the alder s valuable ecological contributions is its capacity to fix nitrogen in nitrogen-deficient soils. Alder roots contain clusters of nitrogen-fixing nodules like those found on legume s such as beans. in addition, newly developing soils exposed by recent glacier retreat and planted with alders show that these trees are appl ying the equivalent of ten bags of high- nitrogen fertilizer to each h ectare per year. Other chemical changes to soil in which they are grow ing Include a lowering of the base content and rise In soil acidity, a s well as a substantial addition of carbon and calcium. to the soil.Another important role many alders play in the wild, particularly in m ountainous areas, is to check the rush of water during spring melt. In Japan and elsewhere, the trees are planted to stabilize soil on steep mountain slopes. Similarly, alders have been planted to stabilize and rehabilitate waste material left over from old mines, flood deposits, and landslide areas in both Europe and Asia.31.What does the passage mainly discuss?(A)Differences between alder trees and Douglas fir trees(B)Alder trees as a source of timber(C)Management plans for using alder trees to improve soil(D)The relation of alder trees to their forest environments32.The word "dense" in line I is closest in meaning to(A) dark(B) tall(C) thick(D) broad33.Alder trees can suppress the growth of nearby trees by depriving th em of(A) nitrogen(B) sunlight(C) soil nutrients(D) water34.Thc passage suggests that Douglas fir trees are(A)a type of alder(B)a type of evergreen(C)similar to sword ferns(D)fast-growing trees35.It can be inferred from paragraph I that hemlock trees(A) are similar in size to alder trees.(B) interfere with the growth of Douglas fir trees(C) reduce the number of alder trees In the forest(D) need less sunlight than do Douglas fir trees36.It can be inferred from paragraph 2 that previous generations of fo resters(A) did not study the effects of alders on forests(B) did not want alders In forests(C) harvested alders for lumber(D) used alders to control the growth of evergreens37.The word "they" in line 27 refers to(A) newly developing soils(B) alders(C) bags(D) chemical changes38.According to the passage that alders are used in mountainous areasto(A) nitrogen(B) calcium(C) carbon(D) oxygen39.It can be Inferred from the passage that alders are used in mountai nous areas to(A) prevent water from carrying away soil(B) hold the snow(C) protect mines(D) provide material for housing40.What is the author s main purpose in the passage?(A) To argue that alder trees are useful in forest management(B) To explain the life cycle of alder trees(C) To criticize the way alders take over and eliminate forests(D) To illustrate how alder trees control soil erosionQuestions 41-50In taking ups new life across the Atlantic, the early European settlers of the United States did not abandon the diversions with which their ancestors had traditionally relieved the tedium of life. Neither the h arshness of existence on the new continent nor Line the scattered popu lation nor the disapproval of the clergy discouraged the majority from the pursuit of pleasure.City and country dwellers. of course. conducted this pursuit in differ ent ways. Farm dwellers in their isolation not only found it harder to locate companions in play but also thanks to the unending demands and pressures of their work, felt it necessary to combine fun with purpose. No other set of colonists too so seriously one expression of the perio d. "Leisure Is time for doing something useful." in the country- side farmers therefore relieved the burden of the daily routine with such d ouble-purpose relaxation as hunting. fishing, and trapping. When a nei ghbor needed help, families rallied from miles around to assist In bui lding a house or barn, husking corn, shearing sheep. or chopping wood. Food, drink, and celebration after the group work provided relaxation and soothed weary muscles.The most eagerly anticipated social events were the rural fairs, Hundr eds of men, women, and children attended from far and near. The men bought or traded farm animals and acquired needed merchandise while the women displayed food prepared in their kitchens, and everyone, Includi ng the youngsters, watched or participated in a variety of competitive sports, with prizes awarded to the winners. These events typically inc luded horse races, wrestling matches, and foot races, as well as some nonathletic events such as whistling competitions. No other occasions did so much to relieve the isolation of farm existence.With the open countryside everywhere at hand, city dwellers naturally shared in some of the rural diversions. Favored recreations included f ishing, hunting1 skating, and swimming. But city dwellers also develop ed other pleasures. which only compact communities made possible.41.What is the passage mainly about?(A) Methods of farming used by early settlers of the United States(B) Hardships faced by the early settlers of the United States(C) Methods of buying, selling, and trading used by early settlers of the United States(D) Ways in which early settlers of the United States relaxed42.What can be inferred about the diversions of the early settlers of the United States?(A) They followed a pattern begun in Europe.(B) They were enjoyed more frequently than in Europe.(C) The clergy organized them.(D) Only the wealthy participated in them.43.Which of he following can be said about the country dwellers attitu de toward "the pursuit of pleasure"?(A) They felt that it should help keep their minds on their work.(B) They felt that it was not necessary.(C) They felt that it should be. productive.(D) They felt that it should not involve eating and drinking.44.The phrase "thanks to" in line 10-11 is closest in meaning to(A)grateful for(B) help with(C) because of(D) machines for45.The word "their" in line 11 refers to(B) farm dwellers(C) demands(D) pressures46.What is meant by the phrase "double-purpose" in line 19 ?(A) Very frequent(B) Useful and enjoyable(C) Extremely necessary(D) Positive and negative47.The phrase "eagerly anticipated" in line 22 is closest in meaning t o(A) well organized(B) old-fashioned(C) strongly opposed(D) looked forward to48.Which of the following can be said about the rural diversions menti oned in the last paragraph in which city dwellers also participated?(A) They were useful to the rural community.(B) They involved the purchase items useful in the home.(C) They were activities that could be done equally easily in the town s(D) They were all outdoor activities.49.What will the author probably discuss in the paragraph following th is passage?(A) The rural diversions enjoyed by both urban and rural people(B) Leisure activities of city dwellers(C) Building methods of the early settlers in rural areas(D)Changes in the lifestyles of settlers as they moved to the cities50. Where in the passage does the author mention factors that might pr event people from enjoying themselves?(A)Line4-7(B) Lines 12-14(C) Lines 17-20(D)Lines 25-271。
托福阅读真题100篇原文+题目(五)
托福阅读真题100篇原文+题目(五)PASSAGE 5Perhaps the most obvious way artistic creation reflects how people live is by mirroring theenvironment — the materials and technologies available to a culture. Stone, wood, tree bark, clay,and sand are generally available materials. In addition, depending on the locality, other resourcesmay be accessible: shells, horns, gold, copper, and silver. The different uses to which societies putthese materials are of interest to anthropologists who may ask, for example, why people chooseto use clay and not copper when both items are available. Although there are no conclusiveanswers yet, the way in which a society views its environment is sometimes apparent in its choiceand use of artistic materials. The use of certain metals, for example, may be reserved forceremonial objects of special importance. Or the belief in the supernatural powers of a stone ortree may cause a sculptor to be sensitive to that material.What is particularly meaningful to anthropologist is the realization that although thematerials available to a society may to some extent limit or influence what it can do artistically,the materials by no means determine what is done. Why do the artists in Japanese society rakesand into patterns; and the artists in Roman society melt sand to form glass? Moreover, evenwhen the same material is used in the same way by members of different societies, the form orstyle of the work varies enormously from culture to culture. A society may simply choose torepresent objects or phenomena that are important to its population. An examination of the artof the Middle Ages tells us something about the medieval preoccupation with theologicaldoctrine. In addition to revealing the primary concerns of a society, the content of that society'sart may also reflect the culture's social stratification.1. According to the passage , gold, copper, and silver are(A) more difficult to handle than wood and(B) of their stable social conditions(C) of the unique stylistic features of their art(D) available only in specific locations2. The word conclusive in line 7 is closest in meaning to(A) definitive(B) controversial(C) concurrent(D) realistic3. The word apparent in line 8 is closest in meaning to(A) attractive(B) logical(C) evident(D) distinct4. Why does the author mention the supernatural powers of a stone or tree in line 10?(A) to show that some sculptors avoid working with specific materials(B) to emphasize the unusual properties of certain materials(C) as an example of how art can be influenced by cultural beliefs(D) as an illustration of the impact of the environment on religious beliefs5. The word it in line 13 refers to(A) realization(B) society(C) extent(D) influence6. It can be inferred that the author mentions the Japanese and Roman societies because(A) they influenced each other stone(B) commonly used by artists in all societies(C) essential to create ceremonial objects(D) they used the same artistic material in very different ways7. According to the passage , all of the following statements about sand are true EXCEPT(A) It is used to create glass.(B) Roman artists mix it into their paints.(C) Its use varies from culture to culture.(D) Japanese artists use it to create artistic patterns.8. The word Moreover in line 16 is closest in meaning to(A) similarly(B) in addition(C) in contrast(D) frequently9. The word preoccupation in line 20 is closest in meaning to(A) involvement(B) separation(C) relationship(D) argument10. The word primary in line 21 is closest in meaning to(A) discrete(B) preliminary(C) ideal(D) fundamental答案:1-10 DACCB DBBAD。
托福阅读辅导:老托福阅读真题及答案passage29
托福阅读辅导:老托福阅读真题及答案passage29为了帮助大家备考托福阅读,练习更多阅读题目。
提高阅读水平,下面小编给大家带来托福阅读辅导:老托福阅读真题及答案PASSAGE 29,希望对大家有所帮助!:老托福阅读文本 passage29During the second half of the nineteenth century, the production of food and feed crops in the United States rose at an extraordinarily rapid rate. Corn production increased by four and a half times, hay by five times, oats and wheat by seven times. The most crucial factor behind this phenomenal upsurge in productivity was the widespread adoption of labor-saving machinery by northern farmers. By 1850 horse-drawn reaping machines that cut grain were being introduced into the major grain-growing regions of the country. Horse-powered threshing machines to separate the seeds from the plants were already in general use. However, it was the onset of the Civil War in 1861 that provided the great stimulus for the mechanization of northern agriculture. With much of the labor force inducted into the army and with grain prices on the rise, northern farmers rushed to avail themselves of the new labor-saving equipment. In 1860 there were approximately 80,000 reapers in the country; five years later there were 350,000.After the close of the war in 1865, machinery became ever more important in northern agriculture, and improved equipment was continually introduced. By 1880 a self-binding reaper had been perfected that not only cut the grain, but also gathered the stalks and bound them with twine. Threshing machines were also being improved and enlarged, and after 1870 they were increasingly powered by steam engines rather than byhorses. Since steam-powered threshing machines were costly items —running from $ 1,000 to $4,000 —they were usually owned by custom thresher owners who then worked their way from farm to farm during the harvest season. "Combines" were also coming into use on the great wheat ranches in California and the Pacific Northwest. These ponderous machines — sometimes pulled by as many as 40 horses — reaped the grain, threshed it, and bagged it, all in one simultaneous operation.The adoption of labor-saving machinery had a profound effect upon the sale of agricultural operations in the northern states — allowing farmers to increase vastly their crop acreage. By the end of century, a farmer employing the new machinery could plant and harvest two and half times as much corn as a farmer had using hand methods 50 years before.老托福阅读题目 passage291. What aspect of farming in the United States in the nineteenth century does the passage mainly discuss?(A) How labor-saving machinery increased crop Production(B) Why southern farms were not as successful as Successful as northern farms(C) Farming practices before the Civil War(D) The increase in the number of people farming2. The word "crucial" in line 4 is closest in meaning to(A) obvious(B) unbelievable(C) important(D) desirable3. The phrase "avail themselves" in line 11 is closest in meaning to(A) take care(B) make use(C) get rid(D) do more4. According to the passage , why was the Civil War a stimulus for mechanization?(A) The army needed more grain in order to feed the soldiers.(B) Technology developed for the war could also the used by farmers.(C) It was hoped that harvesting more grain would lower the price of grain.(D) Machines were needed to replace a disappearing labor force.5. The passage supports which of the following statements about machinery after the Civil War?(A) Many farmers preferred not to use the new machinery.(B) Returning laborers replaced the use of machinery.(C) The use of farm machinery continued to increase.(D) Poor-quality machinery slowed the pace of crop production.6. Combines and self-binding reapers were similar because each(A) could perform more than one function(B) required relatively little power to operate(C) was utilized mainly in California(D) required two people to operate7. The word "they" in line 19 refers to(A) grain stalks(B) threshing machines(C) steam engines(D) horses8. It can be inferred from the passage that most farmers did not own threshing machines because(A) farmers did not know how to use the new machines(B) farmers had no space to keep the machines(C) thresher owner had chance to buy the machines before farmers did(D) the machines were too expensive for every farmer to own9. The word "ponderous" in line 21 is closest in meaning to(A) advanced(B) heavy(C) complex(D) rapid老托福阅读答案 passage29ACBDC ABDB托福技巧:托福阅读做题要以TOEFL真题为基础托福阅读实战经验分享:词汇掌握了,你会发现阅读变得轻松很多。
托福备考托福阅读34套TPO样题+解析+译文29—2 Competition
托福考试 复习TPO 29—2 Competition原文:【1】When several individuals of the same species or of several different species depend on the same limited resource, a situation may arise that is referred to as competition. The existence of competition has been long known to naturalists; its effects were described by Darwin in considerable detail. Competition among individuals of the same species (intraspecies competition), one of the major mechanisms of natural selection, is the concern of evolutionary biology. Competition among the individuals of different species (interspecies competition) is a major concern of ecology. It is one of the factors controlling the size of competing populations, and extreme cases it may lead to the extinction of one of the competing species. This was described by Darwin for indigenous New Zealand species of animals and plants, which died out when competing species from Europe were introduced.【2】No serious competition exists when the major needed resource is in superabundant supply, as in most cases of the coexistence of herbivores (plant eaters). Furthermore, most species do not depend entirely on a single resource, if the major resource for a species becomes scarce, the species can usually shift to alternative resources. If more than one species is competing for a scarce resource, the competing species usually switch to different alternative resources. Competition is usually most severe among close relatives with similar demands on the environment. But it may also occur among totally unrelated forms that compete forthe same resource, such as seed-eating rodents and ants. The effects of such competition are graphically demonstrated when all the animals or all the plants in an ecosystem come into competition, as happened 2 million years ago at the end of Pliocene, when North and South America became joined by the Isthmus of Panama. North and South American species migrating across the Isthmus now came into competition with each other. The result was the extermination of a large fraction of the South American mammals, which were apparently unable to withstand the competition from invading North American species—although added predation was also an important factor.【3】To what extent competition determines the composition of a community and the density of particular species has been the source of considerable controversy. The problem is that competition ordinarily cannot be observed directly but must be inferred from the spread or increase of one species and the concurrent reduction or disappearance of another species. The Russian biologist G. F. Gause performed numerous two-species experiments in the laboratory, in which one of the species became extinct when only a single kind of resource was available. On the basis of these experiments and of field observations, the so-called law of competitive exclusion was formulated, according to which no two species can occupy the same niche. Numerous seeming exceptions to this law have since been found, but they can usually be explained as cases in which the two species, even though competing for a major joint resource, did not really occupy exactly the same niche.【4】Competition among species is of considerable evolutionary importance. Thephysical structure of species competing for resources in the same ecological niche tends to gradually evolve in ways that allow them to occupy different niches. Competing species also tend to change their ranges so that their territories no longer overlap. The evolutionary effect of competition on species has been referred to as “species selection”; however, this description is potentially misleading. Only the individuals of a species are subject to the pressures of natural selection. The effect on the well-being and existence of a species is just the result of the effects of selection on all the individuals of the species. Thus species selection is actually a result of individual selection.【5】Competition may occur for any needed resource. In the case of animals it is usually food; in the case of forest plants it may be light; in the case of substrate inhabitants it may be space, as in many shallow-water bottom-dwelling marine organisms. Indeed, it may be for any of the factors, physical as well as biotic, that are essential for organisms. Competition is usually the more severe the denser the population. Together with predation, it is the most important density-dependent factor in regulating population growth.题目:1.The phrase "mechanisms of natural selection" in the passage(paragraph 1)is closest in meaning toA.types of natural selection.B.dangers of natural selection.C.problems natural selection solves.D.ways natural selection works.2.According to paragraph 1, what is one effect of competition among individuals of different species?A.It results in the eventual elimination of the resource for which they are competing.B.It leads to competition among individuals of the same species.C.It encourages new species to immigrate to an area.D.It controls the number of individuals in the competing populations.3.The word "indigenous" in the passage(paragraph 1)is closest in meaning toA.native.B.rate.C.most.D.numerous.4.In paragraph 1, why does the author mention what happened in New Zealand?A.T o indicate that Darwin understood the importance of competition.B.To illustrate that competition can lead to the extinction of species.C.To identify where the idea of competition among species first arose.D.T o argue against the idea that the process of selection is a natural occurrence.5.According to paragraph 2, competition is not usually a significant factor among two coexisting species whenA.one of the species has only recently moved into the territory of the other.B.the species are closely related to each other.C.the population of one species is much larger than that of the other.D.both of the species are herbivores.6.The word "graphically" in the passage(paragraph 2)is closest in meaning toA.vividly.B.frequently.C.broadly.D.typically.7.In paragraph 2, why does the author talk about what happened as a result of North and South America becoming joined at the Isthmus of Panama?A.T o make the point that predation can have as much effect on species survival as competition does.B.To show how the ability to switch to an alternative resource can give a species a competitive advantage.C.To account for the current species composition of North and South America.D.T o provide an example of the serious effects of competition between unrelated species.8.Paragraph 3 supports the idea that Gause's experiments were important because theyA.provided a situation in which competition could be removed from the interaction between two species.B.showed that previous ideas about the extent to which competition determines thecomposition of a community were completely mistaken.C.helped establish that competition will remove all but one species from any given ecological niche.D.offered evidence that competition between species is minimal when there is an overabundance of a single food source.9.Which of the sentences below best expresses the essential information inthe highlighted sentence in the passage(paragraph 3)? Incorrect choices change the meaningin important ways or leave out essential information.A.Apparent exceptions to this law usually involves cases in which two species compete for the same major resource but occupy slightly different niches.B.Although it may appear that two species always have different niches, many exceptions show that species compete with each other.C.Cases in which two species not only compete for a shared resource but also occupy similar niches are considered exceptions to this law.D.Cases in which the two species do not occupy that same niche yet still compete for the same resource are believed to be exceptions to this law.10.According to paragraph 4, how does competition affect evolution?A.It results in the evolution of physical structures that allow the species to compete with each other more effectively.B.It results I the evolutionary extinction of all but one of the competing species.C.It results in the competing species evolving in such a way that they no longer compete for the same resources.D.It results in the competing species evolving to become so much like each other that competition between them eventually disappears.11.According to paragraph 4, "species selection" is a misleading term because itA.overemphasizes the role of selection pressure in species extinction.B.suggests that selection pressures directly influence whole species.C.does not make a distinction between species extinction and species evolution.D.suggests that extinction always results whenever there is a competition.12.The word "regulating" in the passage(paragraph 5)is closest in meaning toA.controlling.B.explaining.C.observing.D.stopping.13. Look at the four squares [■] that indicate where the following sentence could be added to the passage.Where would the sentence best fit? That is, as the density of a population increases, competition has a greater impact and leads to greater mortality.Competition may occur for any needed resource. ■【A】In the case of animals it is usually food; in the case of forest plants it may be light; in the case of substrate inhabitants it may be space, as in many shallow-waterbottom-dwelling marine organisms. ■【B】Indeed, it may be for any of the factors,physical as well as biotic, that are essential for organisms. ■【C】Competition isusually the more severe the denser the population. ■【D】Together with predation, itis the most importantdensity-dependent factor in regulating population growth.14. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.When necessary resources are limited, competition can occur among individuals of the same species or of different species.petition can eliminate a species, but since most species do not depend on a single resource, competition is often reduced by switching to alternative resources.B.Investigation of the ecological role of competition is difficult because ordinarily the competition cannot be observed directly and must be inferred from its presumed effects.petition between a pair of species tends to lessen over time because the species tend to evolve to occupy different ecological niches and ranges.petition between individual of the same species is usually for food whereas competition between species is usually for habitat.E.Experiments and field observation have established that competition between species is strong enough to prevent two species from occupying the same ecological niche.petition is usually strongest when the density of the competing populations is the same.答案:1.Mechanism本身是机制,原理的意思。
托福阅读真题100篇原文+题目(三十)
托福阅读真题100篇原文+题目(三十)托福阅读真题100篇原文+题目(三十) 虽然我们现在参加的都是新托福阅读考试,但是老托福阅读考试的真题,对大家平时的阅读练习,还是有很大的帮助的。
下面三立教育就为的汇总了老托福阅读真题100篇的详细内容,让我们一起来看看吧!PASSAGE 30Butterflies are among the most extensively studied insects —it is estimated that 90 percent of the world's species have scientific names. As a consequence, they are perhaps the best group of insects for examining patterns of terrestrial biotic diversity and distribution. Butterflies also have a favorable image with the general public. Hence, they are an excellent group for communicating information on science and conservation issues such as diversity.Perhaps the aspect of butterfly diversity that has received the most attention over the past century is the striking difference in species richness between tropical and temperate regions. For example, in 1875 one biologist pointed out the diversity of butterflies in the Amazon when he mentioned that about 700 species were found within an hour's walk, whereas the total number found on the British islands did not exceed 66, and the whole of Europe supported only 321. This early comparison of tropical and temperate butterfly richness has been well confirmed.A general theory of diversity would have to predict not only this difference between temperate and tropical zones, but also patterns within each region, and how these patterns vary among different animal and plant groups. However, for butterflies, variation of species richness within temperate or tropical regions,rather man between them, is poorly understood. Indeed, comparisons of numbers of species among the Amazon basin, tropical Asia, and Africa are still mostly personal communication citations, even for vertebrates. In other words, unlike comparison between temperate and tropical areas, these patterns are still in the documentation phase.In documenting geographical variation in butterfly diversity, some arbitrary, practical decisions are made. Diversity, number of species, and species richness are used synonymously; little is known about the evenness of butterfly distribution. The New World butterflies make up the preponderance of examples because they are the most familiar species. It is hoped that by focusing on them, the errors generated by imperfect and incomplete taxonomy will be minimized.1. Which aspect of butterflies does the passage mainly discuss?(A) Their physical characteristics(B) Their names(C) Their adaptation to different habitats(D) Their variety2. The word consequence in line 2 is closest in meaning to(A) result(B) explanation(C) analysis(D) requirement3. Butterflies are a good example for communicating information about conservation issuesbecause they(A) are simple in structure(B) are viewed positively by people(C) have been given scientific names(D) are found mainly in temperate climates4. The word striking in line 8 is closest in meaning to(A) physical(B) confusing(C) noticeable(D) successful5. The word exceed in line 11 is closest in meaning to(A) locate(B) allow(C) go beyond(D) come close to6. All of the following are mentioned as being important parts of a general theory of diversityEXCEPT(A) differences between temperate and tropical zones(B) patterns of distribution of species in each region(C) migration among temperate and tropical zones(D) variation of patterns of distribution of species among different animals and plants7. The author mentions tropical Asia in lines 19 as an example of a location where(A) butterfly behavior varies with climate(B) a general theory of butterfly diversity has not yet been firmly established(C) butterflies are affected by human populations(D) documenting plant species is more difficult than documenting butterfly species8. Which of the following is NOT well understood by biologists?(A) European butterfly habitats(B) Differences in species richness between temperate and tropical regions(C) Differences in species richness within a temperate or a tropical region(D) Comparisons of behavior patterns of butterflies and certain animal groups9. The word generated in line 26 is closest in meaning to(A) requested(B) caused(C) assisted(D) estimated PASSAGE 30 DABCC CBCB。
托福资料之老托阅读100篇【完整版】.docx
托福资料之老托阅读 100 篇【完整版】老托阅读 100 篇相对 TPO 要简单一些,也是伴随托福备考学员的很重要的一份资料,对于基础薄弱,做 TPO 真题阅读需要过渡的考生来说再适合不过了,为方便考生备考,太傻留学托福考试频道特意将这100 篇托福阅读理解为考生做了归纳和整理,考生只要收藏此页面,就可以在需要的时候打开进行练习了!Toefl 资料下载之老托阅读100 篇【完整版】PASSAGE 1: 冰箱的发展PASSAGE 2: 水循环PASSAGE 3: 印第安人变篮子的故事PASSAGE 4: 哈德逊河派的绘画PASSAGE 6: 硫酸钾在造玻璃和肥皂时的作PASSAGE 5: 创造文化的材料和技术用PASSAGE 7:Philadelphia's 如何发展成商业PASSAGE 8: 为什么大型动物要生活在热带中心雨林PASSAGE 9: 孟买象化石的发现地PASSAGE 10: 人类饮食活动的变化PASSAGE 11: 竹屋怎样防御外界的侵害PASSAGE 12: 动物在岩石上产卵PASSAGE 13: 地球表面岩石的生长与分类PASSAGE 14: 电视对美国政治的影响PASSAGE 15: 菌类对农业的影响PASSAGE 16: 鸟的祖先PASSAGE 17: 鹦鹉产卵的方式PASSAGE 18: 女性对美国建立初期的贡献PASSAGE 19: 北美城市的发展PASSAGE 20: 壁炉的构造PASSAGE 21: 美国早期雕塑的发展PASSAGE 22: 北美城市的发展改革PASSAGE 23: 美国早期城市功能的发展PASSAGE 24: 地球极地激光的形成和外形PASSAGE 25: 营养学研究的历史PASSAGE 26: 关于某彗星的介绍PASSAGE 28:19 世纪末 20 世纪初艺术的发PASSAGE 27: 土壤分解法展PASSAGE 29:一种农业机器在美国的普遍PASSAGE 30: 蝴蝶的种类使用PASSAGE 31: 房租租金的控制PASSAGE 32: 西方艺术发展史PASSAGE 33: 关于做决定的研究PASSAGE 34: 城市的发展以及移民PASSAGE 35: 一种岩洞对观察天象的影响PASSAGE 36: 美国水彩画协会的发展PASSAGE 37: 人的声音对个性的影响PASSAGE 38 : 有关冰河时代的PASSAGE 39: 印第安人捕鱼的生活方式PASSAGE 40: 一周工人工作时间的演变PASSAGE 42:美国铁路发展给美国带来的PASSAGE 41: 地球物种灭绝的分析影响PASSAGE 43: 抗感染药的发明PASSAGE 44: 大脑中神经系统的结构PASSAGE 45:19 世纪的家庭工作PASSAGE 46: 宾夕法尼亚暖气锅炉的改造PASSAGE 47: 美国在 20 世纪初对移民者的PASSAGE 48: 不同领导的领导风格介绍PASSAGE 50:19 世纪艺术在工业社会中的PASSAGE 49: 古代陶瓷的制作方式角色PASSAGE 51 : 美国建立自然生态保护园的PASSAGE 52:美国劳动力从农业到工业的介绍转变PASSAGE 54:被作曲家采用越来越多的音PASSAGE 53: 玻璃纤维的使用方法乐元素PASSAGE 55: 建立公园的计划PASSAGE 56: 民歌定义的不同理解PASSAGE 58:从狩猎到农业的改变对人类PASSAGE 57: 希腊陶瓷技术的发展生活的影响PASSAGE 60: 美国棉花 19 时期作为重要的PASSAGE 59: 历史上第一只鸟的介绍出口商品PASSAGE61: 北美农业殖民地艺术家作品PASSAGE 62: 关于鸟换毛的事PASSAGE 63: 鸟躲避侵略者的三种策略PASSAGE 64: 蚂蚁工作方式的介绍PASSAGE 65: 彗星的 coma 的形成PASSAGE 66: 小孩学说话PASSAGE 67: 某个奇特地方的植被PASSAGE 68: 北美陶瓷的制作PASSAGE 69:美国报纸上气象报道图的变PASSAGE 70: 鸟搭窝的方式化PASSAGE 71: 地理位置对城市发展的影响PASSAGE 72: 哈莱姆文艺复兴PASSAGE 73: 科技与工业化联系PASSAGE 74: 冰川的形成及融化PASSAGE 75:早期狩猎对大型体格动物灭PASSAGE 76: 泥土的形成及其用途绝的影响PSSAGE 77: 生物灭绝的原因PASSAGE 78: 远古的文字PASSAGE 79: 动物行为的研究PASSAGE 80: 美国调查方式的实施PASSAGE 82:婴幼儿时期的模仿对人和动PASSAGE 81: 木星的简介物的影响PASSAGE 83:美国现实主义和自然主义作PASSAGE 84: 美国早期印刷业的内容家介绍PASSAGE 85: 郁金香在北美殖民地的发展PASSAGE 86: 蚂蚁生存使用的各种信号PASSAGE 87: 热能在大气中传输PASSAGE 88: 化石的形成PASSAGE 90:某时期变化对海洋生物的影PASSAGE 89:19 世纪静物艺术品响PASSAGE 91:不同时期艺术装饰风格的简PASSAGE 92: 岩石层对气候的影响介PASSAGE 94:美国工业化给美国经济带来PASSAGE 93: 洛杉矶城市的发展的改变PASSAGE 95:昆虫怎样用信息素来传递信PASSAGE 96:Homestead Act 的弊端息PASSAGE 97: 对月亮两个区域的研究PASSAGE 98 : 松鼠吃橡果的迷PASSAGE 99 : 碳水化合物和气温的关系PASSAGE 100: 小提琴的发展和使用原文网址:托福考试:。
新托福阅读真题100篇
智课网TOEFL备考资料
新托福阅读真题100篇
摘要:考生复习托福阅读可以练习托福阅读真题,能够更加了解托福阅读的考试题型和考题难度,对于考生提高托福阅读水平有一定的帮助。
托福阅读是托福考试中出题量最大的科目,不少考生反应阅读难做。
小编建议考生在平时的复习中不妨多练习下托福阅读真题。
今天小编汇总了新托福阅读真题100篇,方便考生学习。
1. 树叶为何变颜色
2. 瑞典诺贝尔文学评委会
3. 民众抗命Civil Disobedience
4. 陨石坑Craters
5. 英法战争
6. 车票打孔与计算机雏形
7. 地衣LICHEN
8. 路易斯安娜洲购买后的皮毛买卖
9. 同步通讯卫星
10. 聊天对于南方女作家的社会影响
11. 睡眠
12. 人物(女)Amelia 和Muriel的男性化成长
13. 塑料
14. 芝加哥
15. 人物(男)雕塑家Frederic Remington
16. 动物身上为何不生出轮子
17. 树的生存方式
18. 摩天大楼—美国的特征
19. 加洲北水南调工程
20. 蜜蜂意识测试
21. Navajo人的起源
22. 为美国护士教育的抗争
23. 人物(女)建筑师Julia Morgan
24. 沼泽中的动物
25. 供求与市场价格
以上就是关于新托福阅读真题100篇的详细介绍,考生可以通过上方链接下载完整版托福阅读真题100篇进行练习。
完整版配有答案解析,考生答题完毕可以参照解析对题。
相关字搜索:新托福阅读真题100篇勤劳的蜜蜂有糖吃。
托福阅读TPO29-3 The History of Waterpower
The History of WaterpowerMoving water was one of the earliest energy sources to be harnessed to reduce the workload of people and animals. No one knows exactly when the waterwheel was invented, but irrigation systems existed at least 5,000 years ago, and it seems probable that the earliest waterpower device was the noria, a waterwheel that raised water for irrigation in attached jars. The device appears to have evolved no later than the fifth century B.C., perhaps independently in different regions of the Middle and Far East.The earliest waterpower mills were probably vertical-axis mills for grinding corn, known as Norse or Greek mills, which seem to have appeared during the first or second century B.C. in the Middle East and a few centuries later in Scandinavia. In the following centuries, increasingly sophisticated waterpower mills were built throughout the Roman Empire and beyond its boundaries in the Middle East and northern Europe. In England, the Saxons are thought to have used both horizontal0 and vertical-axis wheels. The first documented English mill was in the eighth century, but three centuries later about 5,000 were recorded, suggesting that every settlement of any size had its mill.Raising water and grinding corn were by no means the only uses of the waterpower mill, and during the following centuries, the applications of waterpower kept pace with the developing technologies of mining, iron working, paper making, and the wool and cotton industries. Water was the main source of mechanical power, and by the end of the seventeenth century, England alone is thought to have had some 20,000 working mill. There was much debate on the relative efficiencies of different types of waterwheels. The period from about 1650 until 1800 saw some excellent scientific and technical investigations of different designs. They revealed output powers ranging from about 1 horsepower to perhaps 60 for the largest wheels and confirmed that for maximum efficiency, the water should pass across the blades as smoothly as possible and fall away with minimum speed, having given up almost all of its kinetic energy. (They also proved that, in principle, the overshot wheel, a type of wheel in which an overhead stream of water powers the wheel, should win the efficiency competition.)But then steam power entered the scene, putting the whole future of waterpower in doubt. An energy analyst writing in the year 1800 would have painted a very pessimistic picture of the future for waterpower. The coal-fired steam engine was taking over, and the waterwheel was fast becoming obsolete. However, like many later experts, this one would have suffered from an inability to see into the future. A century later the picture was completely different: by then, the world had an electric industry, and a quarter of its generating capacity was water powered.The growth of the electric-power industry was the result of a remarkable series of scientific discoveries and development in electrotechnology during the nineteenth century, but significant changes in what we might now call hydro (water) technology also played their part. In 1832, the year of Michael Faraday’s discovery that a changing magnetic field produces an electric field, a young French engineer patented a new and more efficient waterwheel. His name was Nenoit Fourneyron, and his device was the first successful water turbine.(The word turbine comes form the Latin turbo: something that spins). The waterwheel, unaltered for nearly 2,000 years, had finally been superseded.Half a century of development was needed before Faraday’s discoveries in electricity were translated into full-scale power stations. In 1881 the Godalming power station in Surrey, England, on the banks of the Wey River, created the world’s first public electricity supply. The power source of this most modern technology was a traditional waterwheel. Unfortunately this early plant experienced the problem common to many forms of renewable energy: the flow in the Wey River was unreliable, and the waterwheel was soon replaced by a steam engine.From this primitive start, the electric industry grew during the final 20 years of the nineteenth century at a rate seldom if ever exceeded by any technology. The capacity of individual power stations, many of them hydro plants, rose from a few kilowatts to over a megawatt in less than a decade.Paragraph 1: Moving water was one of the earliest energy sources to to reduce the workload of people and animals. No one knows exactly when the waterwheel was invented, but irrigation systems existed at least 5,000 years ago, and it seems probable that the earliest waterpower device was the noria, a waterwheel that raised water for irrigation in attached jars. The device appears to have evolved no later than the fifth century B.C., perhaps independently in different regions of the Middle and Far East.O knownO depended onO recognizedO utilized2.In paragraph 1, uncertainty is expressed about all of the following aspects of the early development of waterpower EXCEPTO when exactly the very first waterpower devices were inventedO when exactly the very first waterpower devices were developedO whether water was one of the earliest sources of power to be used by humansO whether the very earliest waterpower devices arose independentlyParagraph 2: The earliest waterpower mills were probably vertical-axis mills for grinding corn, known as Norse or Greek mills, which seem to have appeared during the first or second century B.C. in the Middle East and a few centuries later in Scandinavia. In the following centuries, increasingly sophisticated waterpower mills were built throughout the Roman Empire and beyond its boundaries in the Middle East and northern Europe. In England, the Saxons are thought to have used both horizontal0 and vertical-axis wheels. The first documented English mill was in the eighth century, but three centuries later about 5,000 were recorded, suggesting that every settlement of any size had its mill.3.According to paragraph 2, what was true of the waterpower mills built throughout the Roman Empire?O Most had horizontal-axis wheelsO Their design was based on mills that had long been used in ScandinaviaO Their design was more popular beyond the Empire’s boundaries than it was within the Empire.O They are more advanced than the mills used in the Middle East at an earlier time.of mining, iron working, paper making, and the wool and cotton industries. Water was the main source of mechanical power, and by the end of the seventeenth century, England alone is thought to have had some 20,000 working mill. There was much debate on the relative efficiencies of different types of waterwheels. The period from about 1650 until 1800 saw some excellent scientific and technical investigations of different designs. They revealed output powers ranging from about 1 horsepower to perhaps 60 for the largest wheels and confirmed that for maximum efficiency, the water should pass across the blades as smoothly as possible and fall away with minimum speed, having given up almost all of its kinetic energy. (They also proved that, in principle, the overshot wheel, a type of wheel in which an overhead stream of water powers the wheel, should win the efficiency competition.)O the uses to which waterpower was putO the improvement made to waterpowerO the method by which waterpower was suppliedO the source of waterpower availableParagraph 4: But then steam power entered the scene, putting the whole future of waterpower in doubt.waterpower. The coal-fired steam engine was taking over, and the waterwheel was fast becoming obsolete. However, like many later experts, this one from an inability to see into the future. Aits generating capacity was water powered.5.According to paragraph 4, which of the following was discovered as a result of scientific and technical investigations of waterpower conducted between 1650 and 1800?O Some types of small waterwheel can produce as much horsepower as the very largest wheels.O Waterwheels operate more efficiently when water falls away from their blades slowly than when water falls away quickly.O Waterwheel efficiency can be improved by increasing the amount of kinetic energy water contains as it passes over a waterwheel’s blades.O Unlike other types of waterwheels, the overshot wheel is capable of producing more than 60 horsepower units of energy.losest in meaning to O negativeO unlikelyO surprisingO incompleteO by the time steam power entered the sceneO by the year 1800O by the year 1900O by the time waterwheel was becoming obsoletediscovery that a changing magnetic field produces an electric field, a young French engineer patented a newnearly 2,000 years, had finally been superseded.8.According to paragraph 5, why did waterpower become more importantly by 1900?O Better waterwheel designs improved the efficiency of waterpower.O Waterpower was needed to operate steam engines.O Waterpower was used to generate electricity.O Waterwheels became more efficient than coal-powered engines.9. Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information.O The growth of the electric-power industry stimulated significant changes in hydro technology and scientific progress in electrotechnology in the nineteenth century.O The changes in hydro technology that led to the growth of the electric-power industry also led to discoveries and developments in electrotechnology in the nineteenth century.O Advances in electrotechnology in the nineteenth century and changes in hydro technology were responsible for the growth of the electric-power industry.O In the nineteenth century, the scientific study of electrotechnology and hydro technology benefited greatly from the growth of the electric-power industry.O unimprovedO unequaledO unchangedO unsatisfactoryParagraph 6: Half a century of development was needed befor e Faraday’s discoveries in electricity were translated into full-scale power stations. In 1881 the Godalming power station in Surrey, England, on the banks of the Wey River, created the world’s first public electricity supply. The power source of this most modern technology was a traditional waterwheel. Unfortunately this early plant experienced the problem common to many forms of renewable energy: the flow in the Wey River was unreliable, and the waterwheel was soon replaced by a steam engine.11.The discussion of the history of electric power production in paragraph 6 supports which of the following?O 1832 marked the beginning of the industrial production of electric power.O Turbines using Benoit Fourneyron’s design were eventually used to generate elec tric power.O benoit Fourneyron quickly applied Michael Faraday’s discovery about electric fields to acquire a pattern for a new and more efficient waterwheel.O Practical advances in hydro technology were more important to the development of electric power than were advances in the theoretical understanding of electricity.Paragraph 7: From this primitive start, the electric industry grew during the final 20 years of the nineteenth century at a rate seldom if ever exceeded by any technology. The capacity of individual power stations, many of them hydro plants, rose from a few kilowatts to over a megawatt in less than a decade.12.According to paragraph 7, what problem did the early power station in the town of Godalming in Surrey, United Kingdom, face in providing electricity?O The traditional waterwheel is used was not large enough to meet the demand for energy.O The flow of the River Wey, on which the power station depended, was unreliable.O The operators of the Godalming power station had little experience with hydro technology.O The steam engine that turned the waterwheel was faulty and needed to be replaced.Paragraph 3: Raising water and grinding corn were by no means the only uses of the waterpower mill, and during the following centuries, the applications of waterpower kept pace with the developing technologies of mining, iron working, paper making, and the wool and cotton industries. Water was the main source of mechanical power, and by the end of the seventeenth century, England alone is thought to have had some 20,000 working mill. There was much debate on the relative efficiencies of different types of waterwheels. ■The period from about 1650 until 1800 saw some excellent scientific and technical investigations of different designs. ■They revealed output powers ranging from about 1 horsepower to perhaps 60 for the largest wheels and confirmed that for maximum efficiency, the water should pass across the blades as smoothly as possible and fall away with minimum speed, having given up almost all of its kinetic energy. ■(They also proved that, in principle, the overshot wheel, a type of wheel in which an overhead stream of water powers the wheel, should win the efficiency competition.) ■13. Look at the four squares [■] that indicate where the following sentence could be added to the passage.Happily, serious studies began to be conducted to help resolve disagreements.Where would the sentence best fit?14. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.Ever since the development of waterwheel, which occurred no later than 500 B.C., people have usedmoving water as a source of power.●●●Answer ChoicesO The first water-powered machines were probably used to grind corn, and as technology advanced, waterwheels were used as the main source of power in many industries.O In the late nineteenth century an electric power station in England began using water power from a nearby river, creating a dependable source of power that quickly replaced the steam engine.O In the seventeenth and eighteenth centuries, design improvements I waterwheels led to discoveries of how to increase their efficiency and power output.O Almost every large town in England had a waterpower mill, allowing England to become the world’s leader in industries that depended on water for their power.O Waterpower mills were probably invented about the same time in the Middle East and Scandinavia and then spread to England by about the second century B.C.O After declining in importance in the early 1800’s, waterpower came back into demand by the end of the century as a means to power electric plants and water turbines.参考答案1.○42.○33.○44.○15.○26.○17.○38.○39.○310.○311.○212.○213.○114. The first water-powered machines…Waterpower mills were probably…After declining in importance in…。
托福资料之老托阅读100篇【完整版】
PASSAGE 33:关于做决定的研究
PASSAGE 34:城市的发展以及移民
PASSAGE 35:一种岩洞对观察天象的影响
PASSAGE 36:美国水彩画协会的发展
PASSAGE 37:人的声音对个性的影响
PASSAGE 38 :有关冰河时代的
PASSAGE 39:印第安人捕鱼的生活方式
PASSAGE 78:远古的文字
PASSAGE 79:动物行为的研究
PASSAGE 80:美国调查方式的实施
PASSAGE 81:木星的简介
PASSAGE 82:婴幼儿时期的模仿对人和动物的影响
PASSAGE 83:美国现实主义和自然主义作家介绍
PASSAGE 84:美国早期印刷业的内容
PASSAGE 85: 郁金香在北美殖民地的发展
PASSAGE 70:鸟搭窝的方式
PASSAGE 71:地理位置对城市发展的影响
PASSAGE 72:哈莱姆文艺复兴
PASSAGE 73:科技与工业化联系
PASSAGE 74:冰川的形成及融化
PASSAGE 75:早期狩猎对大型体格动物灭绝的影响
PASSAGE 76:泥土的形成及其用途
PSSAGE 77:生物灭绝的原因
PASSAGE 16:鸟的祖先
PASSAGE 17:鹦鹉产卵的方式
PASSAGE 18:女性对美国建立初期的贡献
PASSAGE 19:北美城市的发展
PASSAGE 20:壁炉的构造
PASSAGE 21:美国早期雕塑的发展
PASSAGE 22:北美城市的发展改革
PASSAGE 23:美国早期城市功能的发展
PASSAGE 94:美国工业化给美国经济带来的改变
老托福100篇答案
老托福100篇答案ANSWER KEYSPASSAGE 1 BBACC DBCDA BPASSAGE 2 AACCD CABD PASSAGE 3 BDCBB CBDAD CA PASSAGE 4 BBDBD CACA PASSAGE 5 DACCB DBBAD PASSAGE 6 DBDBC ACABD PASSAGE 7 BCDCD CBABB PASSAGE 8 DDCCB CADA PASSAGE 9 CBDBD BBAPASSAGE 10 ACDCA BCDBA PASSAGE 11 CAABD CADDPASSAGE 12 CDACB AACCB PASSAGE 13 AACAC CAD PASSAGE 14 DCABC DABAC DBA PASSAGE 15 DABDC CDCBD AB PASSAGE 16 DBBCA DCDCDA PASSAGE 17 DAACA DCBCD CA PASSAGE 18 BBBDB CCCDA PASSAGE 19 BBDDC DCBCA C PASSAGE 20 BCACD DCBAAPASSAGE 21 BDCAA BABDPASSAGE 22 CDBBD ABDDA PASSAGE 23 BBDBA ACADC DAC PASSAGE 24 BCBBC ADABA A PASSAGE 25 CABBB DDABC A PASSAGE 26 ADDBC DACBA PASSAGE 27 DADBC BBDBA D PASSAGE 28 ACBBA ABCBA PASSAGE 29 ACBDC ABDBPASSAGE 30 DABCC CBCB PASSAGE 31 BDCDD ACBBB CPASSAGE 32 CBDBA DACBD PASSAGE 33 ADADC ABDBB C PASSAGE 34 DCADB CDBBA B PASSAGE 35 CABCA BCDBA PASSAGE 36 BADCC BACBD C PASSAGE 37 BBADA BBCCD PASSAGE 38 BDBDB DAACD B PASSAGE 39 CDAAC BCABB DPASSAGE 40 BDDCC ABADCB PASSAGE 41 CBBCD CDADPASSAGE 42 CBDDA BCCAC DPASSAGE 43 BBCAA DPASSAGE 44 CBBCA D PASSAGE 45 BCADA DD PASSAGE 46 ACBDB ABC PASSAGE 47 DCBAD AC PASSAGE 48 DCBAD CCADD PASSAGE 49 BCCBA DBCBD BPASSAGE 50 DCCAC BBCAD PASSAGE 51 BCADB DADDPASSAGE 52 AABDA ADDBD PASSAGE 53 ACBDA ADBD PASSAGE 54 ACCBB DACD PASSAGE 55 ABCCB CABD PASSAGE 56 BDBCC ACAA PASSAGE 57 ABCCC DDAA PASSAGE 58 BABDB CDADC PASSAGE 59 ACBBA ACDBPASSAGE 60 DACDB BACCA PASSAGE 61 BCADD DCAPASSAGE 62 CABDC ABCBD PASSAGE 63 CBDCB ABDCB PASSAGE 64 DCABC AACADPASSAGE 65 BBADB DACCB PASSAGE 66 CABCD AAABD BPASSAGE 67 BDACB DADCD PASSAGE 68 BAADC CDADB C PASSAGE 69 BABCD ADDBBPASSAGE 70 BCDCB ADAD PASSAGE 71 DBCAD CDCDA BPASSAGE 72 BCCAD DCACA PASSAGE 73 CABCB CBDA PASSAGE 74 CBDAB AADBD PASSAGE 75 ADABC CCDCC PASSAGE 76 BACCD BBBC PASSAGE 77 BCDCD AADAB C PASSAGE 78 BDAAD DCCBD PASSAGE 79 BDBDC AACDB CPASSAGE 80 BCADB ADABA A PASSAGE 81 DABDD ACBDD ABPASSAGE 82 CBADD CCABD PASSAGE 83 CAADC BCBDD C PASSAGE 84 CCAAA BDDDB PASSAGE 85 CBADC CDCCB PASSAGE 86 BBDCC CADBD APASSAGE 87 ABBDB DCABDPASSAGE 88 ADBCA BBCD PASSAGE 89 CADAD ACBDPASSAGE 90 CCADB CACC PASSAGE 91 CBBAA DCACCPASSAGE 92 ABDAC DCCCC PASSAGE 93 CAACB DCBCA D PASSAGE 94 DBCAB CBBCA D PASSAGE 95 ABCCB ADBAAD PASSAGE 96 CBCDA ABACC PASSAGE 97 BCDAD CACDC PASSAGE 98 DCCBD DBBAC PASSAGE 99 CDCBC BCBAC D PASSAGE 100 BAACD DBCAA C。
托福阅读真题(最全)
托福阅读真题3PASSAGE 3The Native Americans of northern California were highly skilled at basketry, using the reeds,grasses, barks, and roots they found around them to fashion articles of all sorts and sizes- not only trays, containers, and cooking pots, but hats, boats, fish traps, baby carriers, and ceremonialobjects.Of all these experts, none excelled the Pomo — a group who lived on or near the coast during the 1800's, and whose descendants continue to live in parts of the same region to this day. They made baskets three feet in diameter and others no bigger than a thimble. The Pomo people were masters of decoration. Some of their baskets were completely covered with shell pendants; others with feathers that made the baskets' surfaces as soft as the breasts of birds. Moreover, the Pomo people made use of more weaving techniques than did their neighbors. Most groups made all their basketwork by twining — the twisting of a flexible horizontal material, called a weft, around stiffer vertical strands of material, the warp. Others depended primarily on coiling — a process in which a continuous coil of stiff material is held in the desired shape with tight wrapping of flexible strands. Only the Pomo people used both processes with equal ease and frequency. In addition, they made use of four distinct variations on the basic twining process, often employing more than one of them in a single article.Although a wide variety of materials was available, the Pomo people used only a few. The warp was always made of willow, and the most commonly used weft was sedge root, a woody fiber that could easily be separated into strands no thicker than a thread. For color, the Pomo people used the bark of redbud for their twined work and dyed bullrush root for black incoiled work. Though other materials were sometimes used, these four were the staples in their finest basketry.If the basketry materials used by the Pomo people were limited, the designs were amazingly varied. Every Pomo basketmaker knew how to produce from fifteen to twenty distinct patterns that could be combined in a number of different ways.1. What best distinguished Pomo baskets from baskets of other groups?(A) The range of sizes, shapes, and designs(B) The unusual geometric(C) The absence of decoration(D) The rare materials used2. The word "fashion" in line 2 is closest in meaning to(A) maintain(B) organize(C) trade(D) create3. The Pomo people used each of the following materials to decorate baskets EXCEPT(A) shells(B) feathers(C) leaves(D) bark4. What is the author's main point in the second paragraph?(A) The neighbors of the Pomo people tried to improve on the Pomo basket weaving techniques.(B) The Pomo people were the most skilled basket weavers in their region.(C) The Pomo people learned their basket weaving techniques from other Native Americans.(D) The Pomo baskets have been handed down for generations.5. The word "others " in line 9 refers to(A) masters(B) baskets(C) pendants(D) surfaces6. According to the passage , a weft is a(A) tool for separating sedge root(B) process used for coloring baskets(C) pliable maternal woven around the warp(D) pattern used to decorate baskets7. According to the passage , what did the Pomo people use as the warp in their baskets?(A) bullrush(B) willow(C) sedge(D) redbud8. The word "article" in line 17 is close in meaning to(A) decoration(B) shape(C) design(D) object9. According to the passage . The relationship between redbud and twining is most similar to the relationship between(A) bullrush and coiling(B) weft and warp(C) willow and feathers(D) sedge and weaving10. The word "staples" in line 23 is closest in meaning to(A) combinations(B) limitations(C) accessories(D) basic elements11. The word "distinct" in lime 26 is closest in meaning to(A) systematic(B) beautiful(C) different(D) compatible12. Which of the following statements about Pomo baskets can be best inferred from the passage ?(A) Baskets produced by other Native Americans were less varied in design than those of the Pomo people.(B) Baskets produced by Pomo weavers were primarily for ceremonial purposes.(C) There were a very limited number of basketmaking materials available to the Pomo people.(D) The basketmaking production of the Pomo people has increased over the years.PASSAGE 4The term "Hudson River school" was applied to the foremost representatives ofnineteenth- century North American landscape painting. Apparently unknown during the golden days of the American landscape movement, which began around 1850 and lasted until the late 1860's, the Hudson River school seems to have emerged in the 1870's as a direct result of the struggle between the old and the new generations of artists, each to assert its own style as the representative American art. Theolder painters, most of whom were born before 1835, practicedin a mode often self-taught and monopolized by landscape subject matter and were securely established in and fostered by the reigning American art organization, the National Academy of Design. The younger painters returning home from training in Europe worked more with figural subject matter and in a bold and impressionistic technique; their prospects for patronage in their own country were uncertain, and they sought to attract it by attaining academic recognition in New York. One of the results of the conflict between the two factions was that what in previous years had been referred to as the "American", "native", or, occasionally, "New York" school — the most representative school of American art in any genre — had by 1890 become firmly established in the minds of critics and public alike as the Hudson River school.The sobriquet was first applied around 1879. While it was not intended as flattering, it was hardly inappropriate. The Academicians at whom it was aimed had worked and socialized inNew York, the Hudson's port city, and had painted the river and its shores with varyingfrequency. Most important, perhaps, was that they had all maintained with a certain fidelity a manner of technique and composition consistent with those of America's first popular landscape artist, Thomas Cole,who built a career painting the Catskill Mountain scenery bordering the Hudson River. A possible implication in the term applied to the group of landscapists was that many of them had, like Cole,lived on or near the banks of the Hudson. Further, the river had long served as the principal route toother sketching grounds favored by the Academicians, particularly the Adirondacks and the mountains of Vermont and New Hampshire.1. What does the passage mainly discuss?(A) The National Academy of Design(B) Paintings that featured the Hudson River(C) North American landscape paintings(D) The training of American artists in European academies2. Before 1870, what was considered the most representative kind of American painting?(A) Figural painting(B) Landscape painting(C) Impressionistic painting(D) Historical painting3. The word "struggle" in line 5 is closest in meaning to(A) connection(B) distance(C) communication(D) competition4. The word "monopolized" in line 7 is closest in meaning to(A) alarmed(B) dominated(C) repelled(D) pursued5. According to the passage , what was the function of the National Academy of Design for the painters born before 1835?(A) It mediated conflicts between artists.(B) It supervised the incorporation of new artistic techniques.(C) It determined which subjects were appropriate.(D) It supported their growth and development.6. The word "it" in line 12 refers to(A) matter(B) technique(C) patronage(D) country7. The word "factions" in line 13 is closest in meaning to(A) sides(B) people(C) cities(D) images8. The word "flattering" in line 18 is closest in meaning to(A) expressive(B) serious(C) complimentary(D) flashy9. Where did the younger generation of painters receive its artistic training?(A) In Europe(B) In the Adirondacks(C) In Vermont(D) In New Hampshire答案:PASSAGE 3 BDCBB CBDAD CAPASSAGE 4 BBDBD CACA。
新托福阅读真题100篇
智课网TOEFL备考资料
新托福阅读真题100篇
摘要:考生复习托福阅读可以练习托福阅读真题,能够更加了解托福阅读的考试题型和考题难度,对于考生提高托福阅读水平有一定的帮助。
托福阅读是托福考试中出题量最大的科目,不少考生反应阅读难做。
小编建议考生在平时的复习中不妨多练习下托福阅读真题。
今天小编汇总了新托福阅读真题100篇,方便考生学习。
1. 树叶为何变颜色
2. 瑞典诺贝尔文学评委会
3. 民众抗命Civil Disobedience
4. 陨石坑Craters
5. 英法战争
6. 车票打孔与计算机雏形
7. 地衣LICHEN
8. 路易斯安娜洲购买后的皮毛买卖
9. 同步通讯卫星
10. 聊天对于南方女作家的社会影响
11. 睡眠
12. 人物(女)Amelia 和Muriel的男性化成长
13. 塑料
14. 芝加哥
15. 人物(男)雕塑家Frederic Remington
16. 动物身上为何不生出轮子
17. 树的生存方式
18. 摩天大楼—美国的特征
19. 加洲北水南调工程
20. 蜜蜂意识测试
21. Navajo人的起源
22. 为美国护士教育的抗争
23. 人物(女)建筑师Julia Morgan
24. 沼泽中的动物
25. 供求与市场价格
以上就是关于新托福阅读真题100篇的详细介绍,考生可以通过上方链接下载完整版托福阅读真题100篇进行练习。
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相关字搜索:新托福阅读真题100篇勤劳的蜜蜂有糖吃。
托福阅读真题100篇原文+题目(三十四)
托福阅读真题100篇原文+题目(三十四)托福阅读真题100篇原文+题目(三十四) 托福阅读是托福考试中,难度比较大的科目,阅读内容量大,题型种类多,各种难题都影响着同学们的发挥。
因此大家想要在考试中拿到高分,平时就要做好充分的备考。
下面就是为大家整理的托福阅读真题100篇,供大家练习。
PASSAGE 34Matching the influx of foreign immigrants into the larger cities of the United States during the late nineteenth century was a domestic migration, from town and farm to city, within the United States. The country had been overwhelmingly rural at the beginning of the century, with less than 5 percent of Americans living in large towns or cities. The proportion of urban population began to grow remarkably after 1840, increasing from 11 percent that year to 28 percent by 1880 and to 46 percent by 1900. A country with only 6 cities boasting a population of more than 8,000 in 1800 had become one with 545 such cities in 1900. Of these, 26 had a population of more than 100,000 including 3 that held more than a million people. Much of the migration producing an urban society came from smaller towns within the United States, but the combination of new immigrants and old American settlers on America's urban frontier in the late nineteenth century proved extraordinary.The growth of cities and the process of industrialization fed on each other. The agricultural revolution stimulated many in the countryside to seek a new life in the city and made it possible for fewer farmers to feed the large concentrations of people needed to provide a workforce for growing numbers of factories. Cities also provided ready and convenient markets for the products of industry, and huge contracts in transportation and construction— as well as the expanded market in consumer goods — allowed continued growth of the urban sector of the overall economy of the Untied States.Technological developments further stimulated the process of urbanization. One example is the Bessemer converter (an industrial process for manufacturing steel), which provided steel girders for the construction of skyscrapers. The refining of crude oil into kerosene, and later the development of electric lighting as well as of the telephone, brought additional comforts to urban areas that were unavailable to rural Americans and helped attract many of them from the farms into the cities. In every era the lure of the city included a major psychological element for country people: the bustle and social interaction of urban life seemed particularly intriguing to those raised in rural isolation.1. What aspects of the United States in the nineteenth century does the passage mainly discuss?(A) Technological developments(B) The impact of foreign immigrants on cities(C) Standards of living(D) The relationship between industrialization and urbanization2. The word influx in line 1 is closest in meaning to(A) working(B) processing(C) arrival(D) attraction3. The paragraph preceding the passage most probably discuss(A) foreign immigration(B) rural life(C) the agricultural revolution(D) famous cities of the twentieth century4. What proportion of population of the United States was urban in 1900?(A) Five percent(B) Eleven percent(C) Twenty-eight percent(D) Forty-six percent5. The word extraordinary in line 12 is closet in meaning to(A) expensive(B) exceptional(C) supreme(D) necessary6. The phrase each other in line 13 refers to(A) foreign immigrants and domestic migrants(B) farms and small towns(C) growth of cities and industrialization(D) industry and transportation7. The word stimulated in line 14 is closest in meaning to(A) forced(B) prepared(C) limited(D) motivated8. Why does the author mention electric lighting and the telephone in line 23?(A) They contributed to the agricultural revolution(B) They are examples of the conveniences of city life(C) They were developed by the same individual.(D) They were products of the Bessemer converter.9. The word them in line 25 refers to(A) urban areas(B) rural Americans(C) farms(D) cities10. The word era in line 25 is closest in meaning to(A) period of time(B) location(C) action(D) unique situation11. The word intriguing in line 27 is closest in meaning to(A) profitable(B) attractive(C) comfortable(D) challengingPASSAGE 34 DCADB CDBBA B。
【AAA】托福阅读真题100篇原文+题目(八).doc
托福阅读真题100篇原文+题目(八)对于托福考生,想要突破阅读部分的难关,最好的复习的方法就是,多找一些阅读真题,进行练习。
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提升阅读水平,指日可待。
PASSAGE8ThecanopR,theupperlevelofthetreesintherainforest,holdsaplethoraofclimbingmammalsofmoder atelRlargesize,whichmaRincludemonkeRs,cats,civets,andporcupines.Smallerspecies,includingsuchrodentsasmiceandsmallsquirrels,arenotasprevalentoverallinhightro picalcanopiesastheRareinmosthabitatsgloballR.Smallmammals,beingwarmblooded,sufferhardshipintheeRposedandturbulentenvironmentofthe uppermosttrees.BecauseasmallbodRhasmoresurfaceareaperunitofweightthanalargeoneofsimilar shape,itgainsorlosesheatmoreswiftlR.Thus,inthetrees,whereshelterfromheatandcoldmaRbescarc eandconditionsmaRfluctuate,asmallmammalmaRhavetroublemaintainingitsbodRtemperature.SmallsizemakesiteasRtoscrambleamongtwigsandbranchesinthecanopRforinsects,flowers,orfruit, butsmallmammalsaresurpassed,inthecompetitionforfood,bRlargeonesthathavetheirowntacticsfo rbrowsingamongfood-richtwigs.Theweightofagibbon(asmallape)hangingbelowabrancharchestheterminalleavesdowns othatfruit-bearingfoliagedropstowardthegibbon'sface.Walkingorleapingspeciesofasimilarorevenlargersize accesstheoutertwigseitherbRsnappingoffandretrievingthewholebranchorbRclutchingstiffbranch eswiththefeetortailandpluckingfoodwiththeirhands.SmallclimbinganimalsmaRreachtwigsreadilR,butitisharderforthemthanforlargeclimbinganimalst ocrossthewidegapsfromontreecrowntotheneRtthattRpifRthehighcanopR.Amacaqueorgibbonca nhurlitselffartherthanamousecan:itcanachievearunningstart,anditcanmoreeffectivelRuseabranch asaspringboard,evenbouncingonaclimbseveraltimesbeforejumping.Theforwardmovementofasm allanimalisseriouslRreducedbRtheairfrictionagainsttherelativelRlargesurfaceareaofitsbodR.Finall R,forthemanRsmallmammalsthatsupplementtheirinsectdietwithfruitsorseeds,aninabilitRtospano pengapsbetweentreecrownsmaRbeproblematic,sincetreesthatRieldthesefoodscanbesparse.1.Thepassageanswerswhichofthefollowingquestions?(A)Howistherainforestdifferentfromotherhabitats?(B)Howdoesananimal'sbodRsizeinfluenceananimal'sneedforfood?(C)WhRdoestherainforestprovideanunusualvarietRoffoodforanimals?(D)WhRdolargeanimalstendtodominatetheuppercanopRoftherainforest?2.WhichofthefollowinganimalsislesscommonintheuppercanopRthaninotherenvironments?(A)MonkeRs(B)Cats(C)Porcupines(D)Mice3.ThewordtheRinline4refersto(A)trees(B)climbingmammalsofmoderatelRlargesize(C)smallerspecies(D)hightropicalcanopies4.Accordingtoparagraph2,whichofthefollowingistrueaboutthesmallmammalsintherainforest?(A)TheRhavebodRshapesthatareadaptedtoliveinthecanopR.(B)TheRpreferthetemperatureandclimateofthecanopRtothatofotherenvironments.(C)TheRhavedifficultRwiththechangingconditionsinthecanopR.(D)TheRusethetreesofthecanopRforshelterfromheatandcold.5.Indiscussinganimalsizeinparagraph3,theauthorindicatesthat(A)smallanimalsrequireproportionatelRmorefoodthanlargeranimalsdo(B)alargeanimal'ssizeisanadvantageinobtainingfoodinthecanopR(C)smallanimalsareoftenattackedbRlargeanimalsintherainforest(D)smallanimalsandlargeanimalsareequallRadeptatobtainingfoodinthecanopR6.ThewordtRpifRinline19isclosestinmeaningto(A)resemble(B)protect(C)characterize(D)divide7.Accordingtoparagraph4,whatmakesjumpingfromonetreecrowntoanotherdifficultfor smallmammals?(A)AirfrictionagainstthebodRsurface(B)Thethicknessofthebranches(C)Thedenseleavesofthetreecrown(D)TheinabilitRtousethefrontfeetashands8.Thewordsupplementinline24isclosestinmeaningto(A)control(B)replace(C)lookfor(D)addto9.Whichofthefollowingtermsisdefinedinthepassage?(A)canopR(line1)(B)warmblooded(line5)(C)terminalleaves(line13)(D)springboard(line21)。
托福阅读tpo29R-2原文+译文+题目+答案+背景知识
托福阅读tpo29R-2原文+译文+题目+答案+背景知识原文 (1)译文 (4)竞争 (4)题目 (7)答案 (16)背景知识 (17)原文Competition①When several individuals of the same species or of several different species depend on the same limited resource,a situation may arise that is referred to as competition.The existence of competition has been long known to naturalists;its effects were described by Darwin in considerable petition among individuals of the same species (intraspecies competition),one of the major mechanisms of natural selection,is the concern of evolutionary petition among the individuals of different species(interspecies competition)is a major concern of ecology.It is one of the factors controlling the size of competing populations,and extreme cases it may lead to the extinction of one of the competing species.This was described by Darwin forindigenous New Zealand species of animals and plants,which died out when competing species from Europe were introduced.②No serious competition exists when the major needed resource is in superabundant supply,as in most cases of the coexistence of herbivores (plant eaters).Furthermore,most species do not depend entirely on a single resource,if the major resource for a species becomes scarce,the species can usually shift to alternative resources.If more than one species is competing for a scarce resource,the competing species usually switch to different alternative petition is usually most severe among close relatives with similar demands on the environment. But it may also occur among totally unrelated forms that compete for the same resource,such as seed-eating rodents and ants.The effects of such competition are graphically demonstrated when all the animals or all the plants in an ecosystem come into competition,as happened2 million years ago at the end of Pliocene,when North and South America became joined by the Isthmus of Panama.North and South American species migrating across the Isthmus now came into competition with each other.The result was the extermination of a large fraction of the South American mammals,which were apparently unable to withstand the competition from invading North American species----although added predation was also an important factor.③To what extent competition determines the composition of a community and the density of particular species has been the source of considerable controversy.The problem is that competition ordinarily cannot be observed directly but must be inferred from the spread or increase of one species and the concurrent reduction or disappearance of another species.The Russian biologist G.F.Gause performed numerous two-species experiments in the laboratory,in which one of the species became extinct when only a single kind of resource was available.On the basis of these experiments and of field observations, the so-called law of competitive exclusion was formulated,according to which no two species can occupy the same niche.Numerous seeming exceptions to this law have since been found,but they can usually be explained as cases in which the two species,even though competing for a major joint resource,did not really occupy exactly the same niche.④Competition among species is of considerable evolutionary importance.The physical structure of species competing for resources in the same ecological niche tends to gradually evolve in ways that allow them to occupy different peting species also tend to change their ranges so that their territories no longer overlap.The evolutionary effect of competition on species has been referred to as“species selection”;however,this description is potentially misleading.Only the individuals of a species are subject to the pressures of natural selection.The effect on the well-being and existence of a species is just the result of the effects of selection on all the individuals of the species.Thus species selection is actually a result of individual selection.⑤Competition may occur for any needed resource.In the case of animals it is usually food;in the case of forest plants it may be light;in the case of substrate inhabitants it may be space,as in many shallow-water bottom-dwelling marine organisms.Indeed,it may be for any of the factors,physical as well as biotic,that are essential for petition is usually the more severe the denser the population.Together with predation,it is the most important density-dependent factor in regulating population growth.译文竞争①当同一物种的不同个体或不同的物种都依靠同一有限资源时,这种情况往往会引发成所谓的竞争。
托福TPO29阅读Passage3原文文本+题目+答案解析
为了帮助大家高效备考托福,为大家带来托福TPO29阅读Passage3原文文本+题目+答案解析,希望对大家备考有所帮助。
The History of Waterpower Moving water was one of the earliest energysources to be harnessed to reduce the workload ofpeople and animals.No one knows exactly when thewaterwheel was invented,but irrigation systemsexisted at least 5,000 years ago,and it seems probable that the earliest waterpower device wasthe noria,a waterwheel that raised water for irrigation in attached jars.The device appears tohave evolved no later than the fifth century B.C.,perhaps independently in different regions ofthe Middle and Far East. 流水是人类最早利用的能量来源,以减少人和牲畜的工作负担。
无法知晓水轮是什么时候发明的,但灌溉系统至少在五千年前就已存在。
最早的水力设施很可能是戽水车,一种通过附带的瓦罐将水举起以便灌溉的水轮。
这种设备在公元前十五世纪就可能独立的出现在中东和远东的一些地区了。
The earliest waterpower mills were probably vertical-axis mills for grinding corn,knownas Norse or Greek mills,which seem to have appeared during the first or second century B.C.inthe Middle East and a few centuries later in Scandinavia.In the following centuries,increasinglysophisticated waterpower mills were built throughout the Roman Empire and beyond itsboundaries in the Middle East and northern Europe.In England,the Saxons are thought to haveused both horizontal and vertical-axis wheels.The first documented English mill was in theeighth century,but three centuries later about 5,000 were recorded,suggesting that everysettlement of any size had its mill. 最早用于研磨谷物的水力磨可能都是垂直轴的,比如可能在公元前一到二世纪出现在中东的希腊磨以及几个世纪之后出现在斯堪的纳维亚的斯堪的纳维亚磨。
托福阅读真题第299篇TheEarlyHistoryofJupiter(答案文章最后)
托福阅读真题第299篇TheEarlyHistoryofJupiter(答案文章最后)The Early History of JupiterThe Sun and all planets in the solar system formed from the same cloud of interstellar material known as the solar nebula. However, the size and composition of the four outer Jovian planets (Jupiter, Saturn, Uranus, and Neptune) radically differ from those of the four terrestrial planets, which are closest to the Sun (Mercury, Venus, Earth, and Mars). Whereas the inner planets are composed mainly of heavier elements, the Jovian planets are much larger and contain a much higher proportion of the light gases hydrogen and helium. Jupiter, with its mass of around 300 times that of Earth, is the largest planet in the solar system and is the Jovian planet closest to the Sun.It is generally believed that Jupiter's formation began with the accretion (the coming together of material under the influence of gravitation) of a solid core. This core grew by collision and sticking of dust, ice, rocks, and larger bodies- -a process similar to the accretion of Earth. Jupiter, however, formed outside, or beyond, the“snow line," a special place in the solar system where water vapor condensed (solidified) to form ice grains, and the p resence of“snow" in this region would enhance the density of solid matter and accelerate the accretion process. The mystery is why the proto-Jupiter (early Jupiter) grew so rapidly. pparently, Jupiter grew to a mass of 15 Earths before Mars grew to 10 percent of an Earth mass. Planetary scientist avid Stevenson has suggested that outward migration of water vapor and condensation at the“snow line" may have provided larger concentrations of solid matter at this location, thus speeding upthe formation of the early Jupiter.Jupiter 's growth to a giant planet began when the rock-ice core mass reached 15 Earth masses. t this mass, the gravity of the core can pull in and hold hydrogen and helium, the light gases that account for 99 percent of the mass of the nebula. When this gas accretion process begins, it is very dramatic because the rate of accretion of gas is proportional to the square of the mass already accreted. In other words, the bigger it gets, the faster it grows. If gas could be continually fed to it, it would consume the Universe in a relatively short time! What actually happens is that Jovian planet formation depletes its feeding zone (the area from which a forming planet can accumulate material) of matter, which in turn truncates planet formation. nd although the general properties of this process might be modeled, it just seems to have been by chance that our Jupiter formed as it did.ecause Jupiter's gravity efficiently scatters bodies that approach it, it cleans our solar system of dangerous Earth orbit-crossing asteroids and comets (objects orbiting the Sun that are smaller than planets), thus having a beneficial influence on life on Earth. However, it appears that we have been quite lucky that the Jupiter in our solar system has maintained a stable orbit around the Sun. Jupiter and a giant neighbor like Saturn (the second planet outside the“snow line" and the second largest in the solar system) are a potentially deadly couple that can lead to disastrous situations where a planetary system can literally be torn apart. Recently, it has become possible to use powerful computers to determine the stability of the orbits of Jupiter and Saturn over the lifetime of the planetary system. There are minor chaotic changes but no major changes, and the solar system, at least to a first approximation, is stable over its lifetime. However,this would not be the case if either Jupiter or Saturn were more massive or if the two were closer together. It would also be dangerous to have a third Jupiter-sized planet in a planetary system. In an unstable system the results can be catastrophic.Gravitational perturbations (destabilizing interactions) among the planets can radically change orbits, making them noncircular. lthough instability might start with just two planets, the effects would spread to them all, and the resulting repeated changes in distance between a planet and the central star would prevent any of them from having the persistence of conditions required for a stable atmosphere, ocean, and complex life, such as plants and animals.1.The Sun and all planets in the solar system formed from the same cloud of interstellar material known as the solar nebula. However, the size and composition of the four outer Jovian planets (Jupiter, Saturn, Uranus, and Neptune) radically differ from those of the four terrestrial planets, which are closest to the Sun (Mercury, Venus, Earth, and Mars). Whereas the inner planets are composed mainly of heavier elements, the Jovian planets are much larger and contain a much higher proportion of the light gases hydrogen and helium. Jupiter, with its mass of around 300 times that of Earth, is the largest planet in the solar system and is the Jovian planet closest to the Sun.2.The Sun and all planets in the solar system formed from the same cloud of interstellar material known as the solar nebula. However, the size and composition of the four outer Jovian planets (Jupiter, Saturn, Uranus, and Neptune) radically differ from those of the four terrestrial planets, which are closest to the Sun (Mercury, Venus, Earth, and Mars). Whereas the inner planets are composed mainly of heavier elements, the Jovian planets aremuch larger and contain a much higher proportion of the light gases hydrogen and helium. Jupiter, with its mass of around 300 times that of Earth, is the largest planet in the solar system and is the Jovian planet closest to the Sun.3.It is generally believed that Jupiter's formation began with the accretion (the coming together of material under the influence of gravitation) of a solid core. This core grew by collision and sticking of dust, ice, rocks, and larger bodies- -a process similar to the accretion of Earth. Jupiter, however, formed outside, or beyond, the“snow line," a special place in the solar system where water vapor condensed (solidified) to form ice grains, and the presence of“snow" in this region would enhance the density of solid matter and accelerate the accretion process. The mystery is why the proto-Jupiter (early Jupiter) grew so rapidly. pparently, Jupiter grew to a mass of 15 Earths before Mars grew to 10 percent of an Earth mass. Planetary scientist avid Stevenson has suggested that outward migration of water vapor and condensation at the“snow line" may have provided larger concentrations of solid matter at this location, thus speeding up the formation of the early Jupiter.4.It is generally believed that Jupiter's formation began with the accretion (the coming together of material under the influence of gravitation) of a solid core. This core grew by collision and sticking of dust, ice, rocks, and larger bodies- -a process similar to the accretion of Earth. Jupiter, however, formed outside, or beyond, the“snow line," a special place in the solar system where water vapor condensed (solidified) to form ice grains, and the presence of“snow" in this region would enhance the density of solid matter and accelerate the accretion process. The mystery is why the proto-Jupiter (early Jupiter) grew sorapidly. pparently, Jupiter grew to a mass of 15 Earths before Mars grew to 10 percent of an Earth mass. Planetary scientist avid Stevenson has suggested that outward migration of water vapor and condensation at the“snow line" may have provided larger concentrations of solid matter at this location, thus speeding up the formation of the early Jupiter.5.Jupiter 's growth to a giant planet began when the rock-ice core mass reached 15 Earth masses. t this mass, the gravity of the core can pull in and hold hydrogen and helium, the light gases that account for 99 percent of the mass of the nebula. When this gas accretion process begins, it is very dramatic because the rate of accretion of gas is proportional to the square of the mass already accreted. In other words, the bigger it gets, the faster it grows. If gas could be continually fed to it, it would consume the Universe in a relatively short time! What actually happens is that Jovian planet formation depletes its feeding zone (the area from which a forming planet can accumulate material) of matter, which in turn truncates planet formation. nd although the general properties of this process might be modeled, it just seems to have been by chance that our Jupiter formed as it did.6.Jupiter 's growth to a giant planet began when the rock-ice core mass reached 15 Earth masses. t this mass, the gravity of the core can pull in and hold hydrogen and helium, the light gases that account for 99 percent of the mass of the nebula. When this gas accretion process begins, it is very dramatic because the rate of accretion of gas is proportional to the square of the mass already accreted. In other words, the bigger it gets, the faster it grows. If gas could be continually fed to it, it would consume the Universe in a relatively short time! What actually happens is that Jovian planet formation depletes its feeding zone (the area fromwhich a forming planet can accumulate material) of matter, which in turn truncates planet formation. nd although the general properties of this process might be modeled, it just seems to have been by chance that our Jupiter formed as it did.7.ecause Jupiter's gravity efficiently scatters bodies that approach it, it cleans our solar system of dangerous Earth orbit-crossing asteroids and comets (objects orbiting the Sun that are smaller than planets), thus having a beneficial influence on life on Earth. However, it appears that we have been quite lucky that the Jupiter in our solar system has maintained a stable orbit around the Sun. Jupiter and a giant neighbor like Saturn (the second planet outside the“snow line" and the second largest in the solar system) are a potentially deadly couple that can lead to disastrous situations where a planetary system can literally be torn apart. Recently, it has become possible to use powerful computers to determine the stability of the orbits of Jupiter and Saturn over the lifetime of the planetary system. There are minor chaotic changes but no major changes, and the solar system, at least to a first approximation, is stable over its lifetime. However, this would not be the case if either Jupiter or Saturn were more massive or if the two were closer together. It would also be dangerous to have a third Jupiter-sized planet in a planetary system. In an unstable system the results can be catastrophic.8.ecause Jupiter's gravity efficiently scatters bodies that approach it, it cleans our solar system of dangerous Earth orbit-crossing asteroids and comets (objects orbiting the Sun that are smaller than planets), thus having a beneficial influence on life on Earth. However, it appears that we have been quite lucky that the Jupiter in our solar system has maintained a stable orbit around the Sun. Jupiter and a giant neighbor like Saturn (thesecond planet outside the“snow line" and the second largest in the solar system) are a potentially deadly couple that can lead to disastrous situations where a planetary system can literally be torn apart. Recently, it has become possible to use powerful computers to determine the stability of the orbits of Jupiter and Saturn over the lifetime of the planetary system. There are minor chaotic changes but no major changes, and the solar system, at least to a first approximation, is stable over its lifetime. However, this would not be the case if either Jupiter or Saturn were more massive or if the two were closer together. It would also be dangerous to have a third Jupiter-sized planet in a planetary system. In an unstable system the results can be catastrophic.9.Jupiter 's growth to a giant planet began when the rock-ice core mass reached 15 Earth masses. t this mass, the gravity of the core can pull in and hold hydrogen and helium, the light gases that account for 99 percent of the mass of the nebula.⬛When this gas accretion process begins, it is very dramatic because the rate of accretion of gas is proportional to the square of the mass already accreted.⬛In other words, the bigger it gets, the faster it grows.⬛If gas could be continually fed to it, it would consume the Universe in a relatively short time! ⬛What actually happens is that Jovian planet formation depletes its feeding zone (the area from which a forming planet can accumulate material) of matter, which in turn truncates planet formation. nd although the general properties of this process might be modeled, it just seems to have been by chance that our Jupiter formed as it did.10.。
托福阅读真题100篇原文+题目(二)
托福阅读真题100篇原文+题目(二)PASSAGE 2The geology of the Earth's surface is dominated by the particular properties of water. Presenton Earth in solid, liquid, and gaseous states, water is exceptionally reactive. It dissolves,transports, and precipitates many chemical compounds and is constantly modifying the face ofthe Earth.Evaporated from the oceans, water vapor forms clouds, some of which are transported bywind over the continents. Condensation from the clouds provides the essential agent ofcontinental erosion: rain. Precipitated onto the ground, the water trickles down to form brooks,streams, and rivers, constituting what are called the hydrographic network. This immensepolarized network channels the water toward a single receptacle: an ocean. Gravity dominatesthis entire step in the cycle because water tends to minimize its potential energy by running fromhigh altitudes toward the reference point, that is, sea level.The rate at which a molecule of water passes though the cycle is not random but is a measureof the relative size of the various reservoirs. If we define residence time as the average time for awater molecule to pass through one of the three reservoirs — atmosphere, continent, and ocean— we see that the times are very different. A water molecule stays, on average, eleven days inthe atmosphere, one hundred years on a continent and forty thousand years in the ocean. Thislast figure shows the importance of the ocean as the principal reservoir of the hydrosphere butalso the rapidity of water transport on the continents.A vast chemical separation process takes places during the flow of water over the continents.Soluble ions such as calcium, sodium, potassium, and some magnesium are dissolved andtransported. Insoluble ions such as aluminum, iron, and silicon stay where they are and form thethin, fertile skin of soil on which vegetation can grow. Sometimes soils are destroyed andtransported mechanically during flooding. The erosion of the continentsthus results from twoclosely linked and interdependent processes, chemical erosion and mechanical erosion. Theirrespective interactions and efficiency depend on different factors.1. The word modifying in line 4 is closest in meaning to(A) changing(B) traveling(C) describing(D) destroying2. The word which in line 5 refers to(A) clouds(B) oceans(C) continents(D) compounds3. According to the passage , clouds are primarily formed by water(A) precipitating onto the ground(B) changing from a solid to a liquid state(C) evaporating from the oceans(D) being carried by wind4. The passage suggests that the purpose of the hydrographic network (line 8) is to(A) determine the size of molecules of water(B) prevent soil erosion caused by flooding(C) move water from the Earth's surface to the oceans(D) regulate the rate of water flow from streams and rivers5. What determines the rate at which a molecule of water moves through the cycle, as discussed in the third paragraph?(A) The potential energy contained in water(B) The effects of atmospheric pressure on chemical compounds(C) The amounts of rainfall that fall on the continents(D) The relative size of the water storage areas6. The word rapidity in line 19 is closest in meaning to(A) significance(B) method(C) swiftness(D) reliability7. The word they in line 24 refers to(A) insoluble ions(B) soluble ions(C) soils(D) continents8. All of the following are example of soluble ions EXCEPT(A) magnesium(B) iron(C) potassium(D) calcium9. The word efficiency in line 27 is closest in meaning to(A) relationship(B) growth(C) influence(D) effectiveness答案:1-9 AACCD CABD。
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托福阅读真题100篇原文+题目(二十九)虽然我们现在参加的都是新托福阅读考试,但是老托福阅读考试的真题,对大家平时的阅读练习,还是有很大的帮助的。
下面三立教育就为的汇总了老托福阅读真题100篇的详细内容,让我们一起来看看吧!PASSAGE 29During the second half of the nineteenth century, the production of food and feed crops in the United States rose at an extraordinarily rapid rate. Corn production increased by four and a half times, hay by five times, oats and wheat by seven times. The most crucial factor behind this phenomenal upsurge in productivity was the widespread adoption of labor-saving machinery by northern farmers. By 1850 horse-drawn reaping machines that cut grain were being introduced into the major grain-growing regions of the country. Horse-powered threshing machines to separate the seeds from the plants were already in general use. However, it was the onset of the Civil War in 1861 that provided the great stimulus for the mechanization of northern agriculture. With much of the labor force inducted into the army and with grain prices on the rise, northern farmers rushed to avail themselves of the new labor-saving equipment. In 1860 there were approximately 80,000 reapers in the country; five years later there were 350,000.After the close of the war in 1865, machinery became ever more important in northern agriculture, and improved equipment was continually introduced. By 1880 a self-binding reaper had been perfected that not only cut the grain, but also gathered the stalks and bound them with twine. Threshing machines were also being improved and enlarged, and after 1870 they were increasingly powered by steam engines rather than by horses. Since steam-powered threshing machines were costly items — running from $ 1,000 to $4,000 — they were usuallyowned by custom thresher owners who then worked their way from farm to farm during the harvest season. Combines were also coming into use on the great wheat ranches in California and the Pacific Northwest. These ponderous machines — sometimes pulled by as many as 40 horses — reaped the grain, threshed it, and bagged it, all in one simultaneous operation.The adoption of labor-saving machinery had a profound effect upon the sale of agricultural operations in the northern states — allowing farmers to increase vastly their crop acreage. By the end of century, a farmer employing the new machinery could plant and harvest two and half times as much corn as a farmer had using hand methods 50 years before.1. What aspect of farming in the United States in the nineteenth century does the passage mainlydiscuss?(A) How labor-saving machinery increased crop Production(B) Why southern farms were not as successful as Successful as northern farms(C) Farming practices before the Civil War(D) The increase in the number of people farming2. The word crucial in line 4 is closest in meaning to(A) obvious(B) unbelievable(C) important(D) desirable3. The phrase avail themselves in line 11 is closest in meaning to(A) take care(B) make use(C) get rid(D) do more4. According to the passage , why was the Civil War a stimulus for mechanization?(A) The army needed more grain in order to feed the soldiers.(B) Technology developed for the war could also the used by farmers.(C) It was hoped that harvesting more grain would lower the price of grain.(D) Machines were needed to replace a disappearing labor force.5. The passage supports which of the following statements about machinery after the Civil War?(A) Many farmers preferred not to use the new machinery.(B) Returning laborers replaced the use of machinery.(C) The use of farm machinery continued to increase.(D) Poor-quality machinery slowed the pace of crop production.6. Combines and self-binding reapers were similar because each(A) could perform more than one function(B) required relatively little power to operate(C) was utilized mainly in California(D) required two people to operate7. The word they in line 19 refers to(A) grain stalks(B) threshing machines(C) steam engines(D) horses8. It can be inferred from the passage that most farmers did not own threshing machines because(A) farmers did not know how to use the new machines(B) farmers had no space to keep the machines(C) thresher owner had chance to buy the machines before farmers did(D) the machines were too expensive for every farmer to own9. The word ponderous in line 21 is closest in meaning to(A) advanced(B) heavy(C) complex(D) rapidPASSAGE 29 ACBDC ABDB。