托福听力TPO14原文Lecture4

托福听力tpo46lecture1、2、3、4原文+题目+答案+译文Lecture1 (2)原文 (2)题目 (4)答案 (6)译文 (6)Lecture2 (8)原文 (8)题目 (10)答案 (12)译文 (12)Lecture3 (14)原文 (14)题目 (16)答案 (18)译文 (18)Lecture4 (19)原文 (19)题目 (22)答案 (24)译文 (24)Lecture1原文NARRATOR:Listen to part of a lecture in a biology class.FEMALE PROFESSOR:I'd like to continue our discussion of animal behavior and start off today's class by focusing on a concept we haven't yet touched upon—swarm intelligence.Swarm intelligence is a collective behavior that emerges from a group of animals,like a colony of termites,a school of fish,or a flock of birds.Let's first consider the principles behind swarm intelligence,and we'll use the ant as our model.Now,an ant on its own is not that smart.When you have a group of ants,however, there you have efficiency in action.You see,there's no leader running an ant colony. Each individual,each individual ant operates by instinctively following a simple set of rules when foraging for food.Rule number1:Deposit a chemical marker…called a pheromone.And rule2:Follow the strongest pheromone path.The strongest pheromone path is advantageous to ants seeking food.So,for example,when ants leave the nest,they deposit a pheromone trail along the route they take.If they find food,they return to the nest on the same path and the pheromone trail gets stronger—it's doubled in strength.Because an ant that took a shorter path returns first,its pheromone trail is stronger,and other ants will follow it, according to rule2.And as more ants travel that path,the pheromone trail gets even stronger.So,what's happening here?Each ant follows two very basic rules,and each ant acts on information it finds in its immediate local environment.And it's important to note: Even though none of the individual ants is aware of the bigger plan,they collectively choose the shortest path between the nest and a food source because it's the most reinforced path.By the way,a-a few of you have asked me about the relevance of what we're studying to everyday life.And swarm intelligence offers several good examples of how concepts in biology can be applied to other fields.Well,businesses have been able to use this approach of following simple rules when designing complex systems,for instance,in telephone networks.When a call is placed from one city to another,it has to connect through a number of nodes along the way.At each point,a decision has to be made:Which direction does the call go from here?Well,a computer program was developed to answer this question based on rules that are similar to the ones that ants use to find food.Remember,individual ants deposit pheromones,and they follow the path that is most reinforced.Now,in the phone network,a computer monitors the connection speed of each path, and identifies the paths that are currently the fastest—the least crowded parts of the network.And this information,converted into a numeric code,is deposited at the network nodes.This reinforces the paths that are least crowded at the moment. The rule the telephone network follows is to always select the path that is most reinforced.So,similar to the ant's behavior,at each intermediate node,the call follows the path that is most reinforced.This leads to an outcome which is beneficial to the network as a whole,and calls get through faster.But getting back to animal behavior,another example of swarm intelligence is the way flocks of birds are able to fly together so cohesively.How do they coordinate their movements and know where they're supposed to be?Well,it basically boils down to three rules that each bird seems to follow.Rule1:Stay close to nearby birds.Rule2:Avoid collision with nearby birds.And rule3:Move in the average speed and direction of nearby birds.Oh,and by the way,if you're wondering how this approach can be of practical use for humans:The movie industry had been trying to create computer-generated flocks of birds in movie scenes.The question was how to do it easily on a large scale?A researcher used these threerules in a computer graphics program,and it worked!There have also been attempts to create computer-generated crowds of people using this bird flocking model of swarm intelligence.However,I'm not surprised that more research is needed.The three rules I mentioned might be great for bird simulations,but they don't take into account the complexity and unpredictability of human behavior.So,if you want to create crowds of people in a realistic way,that computer model might be too limited.题目1.What is the lecture mainly about?A.Various methods that ants use to locate foodB.A collective behavior common to humans and animalsC.A type of animal behavior and its application by humansD.Strategies that flocks of birds use to stay in formation2.According to the professor,what behavior plays an important role in the way ants obtain food?A.Ants usually take a different path when they return to their nest.B.Ants leave chemical trails when they are outside the nest.C.Small groups of ants search in different locations.D.Ants leave pieces of food along the path as markers.3.What are two principles of swarm intelligence based on the ant example?[Click on2answers.]A.Individuals are aware of the group goal.B.Individuals act on information in their local environment.C.Individuals follow a leader's guidance.D.Individuals instinctively follow a set of rules.4.According to the professor,what path is followed by both telephone calls on a network and ants seeking food?A.The path with the least amount of activityB.The most crowded pathC.The path that is most reinforcedD.The path that has intermediate stopping points5.Why does the professor mention movies?A.To identify movie scenes with computer-simulated flocks of birdsB.To identify a good source of information about swarm intelligenceC.To emphasize how difficult it still is to simulate bird flightD.To explain that some special effects in movies are based on swarm intelligence6.What is the professor's attitude about attempts to create computer-generated crowds of people?A.She believes that the rules of birds'flocking behavior do not apply to group behavior in humans.B.She thinks that crowd scenes could be improved by using the behavior of ant colonies as a model.C.She is surprised by how realistic the computer-generated crowds are.D.She is impressed that computer graphics can create such a wide range of emotions.答案C B BD C D A译文下面听一段生物学讲座的片段。

为了帮助大家高效备考托福，为大家带来托福TPO14口语Task4阅读文本+听力文本+题目+满分范文，希望对大家备考有所帮助。

托福TPO14口语Task4阅读文本： Comfort Zone Bias Psychologists have found that when people make important decisions, they often choose to stay in their “comfort zones”, that is, they prefer remaining in comfortable, familiar situations, rather than entering into new, unfamiliar ones. This tendency is often referred to as the comfort zone bias. When people are reasonable content, they often decide not to pursue a new opportunity, even if it attracts them and offers more advantages. Psychologists believe that the comfort zone bias exists not only because we have a natural preference for what we already know, but also because we want to avoid taking risks. 托福TPO14口语Task4听力文本： Now listen to part of a lecture in a psychology class. (male professor) OK, so this comes up a lot when people make career decisions.A friend of mine from college always wanted to be a film reviewer. He was a film major and he loved movies. Most of all, he loved to write about movies. So, when he graduated, he looked for a job as a film reviewer for a newspaper, because as a film reviewer, he gets to see films for free and would be paid to write about them.That's what he loved! But, he couldn't find the job as a film reviewer. So, he took a position as a news reporter instead, for a newspaper, investigating stories, writing about events, what news reporters do.Now, at first, my friend wasn't sure if he'd be any good at this. He'd never been as a news reporter before. But, eventually, he adjusted and gained confidence and he got used to the job. And he realized he was actually a pretty good reporter.Anyway, here's the thing: after a few years, the film reviewer for the paper where he worked quit, and my friend was offered her job. This was his dream, right? Here’s opportunity to be a film reviewer had finally come! And the new job would actually pay more, too.But, did he take the job? No! He turned it down. He told me he’d gotten used to being a news reporter and he just didn't want to try something else. It seemed like too big a change, since, well, there was a chance the new job might not work out. 托福TPO14口语Task4题目： Using the example from the lecture, explain the comport zone bias. 托福TPO14口语Task4满分范文： When making important decisions, people prefer to remain in familiar situations that make them feel comfortable and give up new opportunities. This tendency is called comfort zone bias. And the professor takes his friend's experience. One of his friends in college was a film major who was crazy about films. However, he couldn't find a job as a film reviewer, so he became a news reporter instead. It wasn't easy for him to become a journalist at first, but when he adapted himself to the job, he realized that he was actually good at it, and therefore a job reporter became his comfort zone. So later even when he was offered the position of a film reviewer, he declined it because of his bias toward his reporter job. (181 words) 以上是给大家整理的托福TPO14口语Task4阅读文本+听力文本+题目+满分范文，希望对你有所帮助!。

托福听⼒真题及答案托福听⼒是⼀种对考⽣听⼒的考核⽅式。

是⼀般是两到三个部分，每个部分由⼀段对话和两个讲座，每个部分需要听的录⾳⼤约是20分钟，答题时间是10分钟，下⾯是⼩编收集推荐的托福听⼒真题，仅供参考，欢迎阅读。

2015年10⽉11⽇托福听⼒真题讲座1 哲学holism和reductionism的区别(两个学术研究的不同⾓度)⽤ants举例，先说D：每个ant有⾃⼰的task，每个⼩的part都发挥⾃⼰的作⽤。

教授下结论，看了individual的作⽤可以predict整体的作⽤。

再说H：解释整体的作⽤并不单纯个体作⽤的叠加，类似1+1>2。

即整体作⽤更⼤。

提到leader的作⽤。

再说蚁群有queen，但是queen主要是lay eggs⽽不是organize。

讲座2：植物学botany 讨论动物觅⾷与物种多样性，整个⽂章对⽐polar region与tropical region的动物。

Polar：⼀个动物吃多种⾷物，⽽且还migration，就是因为可以吃的东西选择少，不diverse，这些动物可以被称为generalist，举例foxTropical：动物可以吃东西选择多，⽽且climate stable所以吃⼀种就⾏，这样避免了animals之间的competition。

这些动物是specialist。

举例黄⽑的⼀个动物。

讨论这两种情况呢的利弊：tropical只吃⼀个，要是被吃的那个消失了，就会导致extinction。

说其实⼈类并不是extinction的主要原因，但是⼈类造成的harm也需要考虑，⼈类需要意识到⾃⼰⾏为的后果。

对话2:学⽣服务场景student和employee at theater的对话。

学⽣要买票，因为⽗母来了，要看看什么play可以看。

Employee说可以看哈姆雷特，同时推荐了season ticket给她，并告诉她三个好处：1. Cheep，因为有discount2. 可以卖extra ticket，但不保证座位在⼀起，因为这两部分票是分开卖的，⼥⽣说没有关系。

托福TPO14综合写作阅读+听力原文+满分范文【雷哥托福整理】在备考托福写作的过程中，总是将托福的独立作文放在了第一位，但是实际上，综合作文也是占到了作文总分30分里面的50%的分值，不要等到分数出来了，才发现其实是综合作文的limited或者fair极大的影响了自己的分数。

考过的同学会发现托福综合作文分数不高，很大程度上是受我们听力实力的影响，我们很多托福考生的听力分数只有16分上下的时候，对于托福综合作文的听力妥妥的是束手无策，而且很多托福考生还感觉自己都听懂了，那也只能说明你听懂了大意，但是听力里面要的是每一个细节！请注意，是每一个细节！雷哥托福小托君给大家分享TPO1-30综合作文部分的阅读和听力文本全集与综合作文的满分作文，以及满分作文的解析。

如果自己的托福综合作文分数如果可以很给力的话，就已经搞定了15分的分数，可极大地缓解托福独立作文的压力。

文末教你如何使用这个材料。

TPO14 综合写作听力+阅读原文ReadingEvery year, forest fires and severe storms cause a great deal of damage to forests in the northwestern United States. One way of dealing with the aftermath of these disasters is called salvage logging, which is the practice of removing dead trees from affected areas and using the wood for lumber, plywood, and other wood products. There are several reasons why salvage logging is beneficial both to a damaged forest and to the economy.First, after a devastating fire, forests are choked with dead trees. If the trees are not removed, they will take years to decompose; in the meantime, no new trees can grow in the cramped spaces. Salvage logging, however, removes the remains of dead treesand makes room for fresh growth immediately, which i s likely to help forest areas recover from the disaster.Also, dead trees do more than just take up space. Decaying wood is a highly suitable habitat for insects such as the spruce bark beetle, which in large numbers can damage live, healthy spruce trees. So by removing rotting wood, salvage logging helps minimize the dangers of insect infestation, thus contributing to the health of the forest.Third and last, salvage logging has economic benefits. Many industries depend upon the forests for their production, and because of this a fire can have a very harmful effect on the economy. Often, however, the trees that have been damaged by natural disasters still can provide much wood that is usable by industries. Furthermore, salvage logging requires more workers than traditional logging operations do, and so it helps create additional jobs for local residents.ListeningProfessor: Salvage logging may appear to be an effective way of helping forests recover after a destructive fire or storm, but it can actually result in seriouslonger-term environmental damage. Its economic benefits are also questionable.First, cleaning up a forest after a fire or storm does not necessarily create the right conditions for tree growth. In fact, the natural process of wood decomposition enriches the soil and makes it more suitable for future generations of tree. The rapid removal of dead trees can result in soil that lacks the nutrients necessary for growth.Second, it's true that rotting wood can increase insect populations, but is this really bad for the forest? In fact, spruce bark beetles have lived in Alaskan forest for nearly a hundred years without causing major damage. And of course dead trees do not provide habitats only for harmful insects. They are also used by birds and other insects that are important contributors to the long-term health of forests. In the longrun, therefore, salvage logging may end updoing more harm to forests than harmful insects do.And third, the economic benefits of salvage logging are small and don’t last very long, in severely damaged forests, much of the lumber can be recovered only by using helicopters and other vehicles that are expensive to use and maintain. Furthermore, jobs created by salvage logging are only temporary and are often fitted by outsiders with more experience or training than local residents have.首先，就是在自己做托福TPO模考之后，可以根据这里面的听力的文本，来检验自己的听力内容是否抓的足够好，尤其是要看写的够不够全！很多时候，我们的综合作文之所以分低，就是因为听力写的不全！第二点，也可以用于在托福考试前来做跟读，有不少托福考生跟小托君说，自己的口语实力不够，那么做跟读，仔细地来模仿ETS官方素材，是一个很好的提高自己口语的方式。

官方真题Official35托福听力Lecture4对话原文免费分享(原TPO)官方真题Official模考软件一直是考生不可或缺的一个备考工具，很多托福考生都在用这个。

为了让大家更好的使用这个官方真题Official资料，这里小站教育编辑为大家整理了完整的官方真题Official真题文本、题目及答案解析，希望对大家托福备考有帮助。

官方真题Official35托福听力Lecture 4对话原文免费分享(原TPO)官方真题Official 35-L4Narrator:Listen to part of a lecture in an Earth science class.Professor:Let's review something from last week. We talked about an event that happened 65 million years ago. Anyone?Student:An asteroid hit Earth. Um...well, we think an asteroid hit Earth, near the Yucatan Peninsula, in Mexico, and that wiped out all the dinosaurs.Professor:Right. I wouldn't say that we've got 100% proof, but there's very strong evidence that this is why that mass extinction occurred.Okay. But did you know there was an earlier extinction far greater than the one that killed off the dinosaurs? It was what we call the Permian Extinction.Now, way back about 290 million years ago, at the beginning of the Permian Period, there was just one big continent, a super continent. And as the climate warmed up, plant and animal species began to diversify profusely. So life during the PermianPeriod was abundant and diverse. But about 250 million years ago, the Permian Period ended with a rapid mass extinction, something happened that wiped out 75% of the land animals and over 95% of ocean life.So what was it? What could have caused this?Well, with the all the evidence that it was an asteroid that led to the dinosaur extinction, we began asking ourselves: is it possible that another asteroid much earlier caused the Permian Extinction? And so researchers have been looking for an impact crater.Well, with the all the evidence that it was an asteroid that led to the dinosaur extinction, we began asking ourselves: is it possible that another asteroid much earlier caused the Permian Extinction? And so researchers have been looking for an impact crater.Student:I thought the Permian Extinction was caused by a decline in sea water oxygen levels. Isn't that what's in the textbook?Professor:But don't forget the textbook makes it very clear that's only a theory.Student:And it mentions something about volcanic eruptions too.Professor:It does, but now this new theory has led to a search for evidence of an asteroid impact. And one place of interest is a region called Wilkes Land in eastern Antarctica.A few years ago, a researcher reported a strange anomaly beneath the ice in Wilkes Land. Evidence of what may be a mascon. That's just short for mass concentration.When an asteroid hits Earth, when it slams into Earth's crust, we think that causes molten rock from deep below the surface to rise up into the impact area. Sort of like if you bump your head, you get a big lump under the skin. Fluid makes the area swell. Anyway, the material flowing up from below the crust is more dense than the crust itself. So that's how we get a mascon, a spot in the crust with newer crust material that's more dense than the material all around it.There're lots of mascons on the moon too, where a mascon’s density causes a small increase in the local gravity that can be measured and mapped by orbiting spacecraft. And where do these mascons tend to be found? In the centers of impact craters on the moon's surface.But back to Wilkes Land. We’re not certain that the mascon there...what might be a mascon ...was actually caused by the impact of an asteroid, but there does seem to be evidence. Researchers notice a gravity anomaly similar to those on the moon. And the spot where the gravity readings are especially high...this is right in the middle of a 500-kilometer wide, circular ridge, what could be part of an old impact crater.And if there was an asteroid impact there in Wilkes Land, the next question is: did it happen 250 million years ago? Because that would put it when in geologic history?Student:At the end of the Permian Period? Right when those animals went extinct.Professor: Exactly.Student:But can't researchers figure that out by studying the rocks there in Wilkes Land...where this impact supposedly took place?Professor:Well, to get to anything from that long ago, we would have to drill down to about a mile, about 1.6 kilometers of solid ice that covers the area today. And that's not likely to happen.But speaking of rocks, I should mention that Wilkes Land is not the only place of interest here. There's another called the Bedout High off the coast of Australia. And we have rock samples from the Bedout High. Some apparently have extraterrestrial origin. I mean, they show the effects of extreme temperatures and pressures, the level of extremes produced only by an impact. And as for their age, well, they do in fact, date back to about 250 million years ago.怎样用单词推断托福听力对话场景方法可行的原因仍在于ETS的出题原则，大家肯定已经非常熟悉托福听力考试中的"学生生活原则"，它是ETS坚定不移的出题原则，这一原则使托福听力从内容上永远离不了学生生活这一中心。

TPO 14 听力原文Conversation 1Narrator:Listen to a conversation between a student and the librarian employee.Student:Hi, I am looking for this book---the American judicial system. And I can’t seem to findit anywhere. I need to read a chapter for my political science class.Librarian:Let me check in the computer. Um… doesn’t seem to be checked out and it’s not onreserve. You’ve checked the shelves I assume.Student:Yeah, I even checked other shelves and tables next to where the book should be.Librarian:Well, it’s still here in the library. So people must be using it. You know this seems tobe a very popular book tonight. We show six copies. None are checked out. And, yetyou didn’t even find one copy on the shelves. Is it a big class?Student:Maybe about Seventy Five?Librarian:Well, you should ask your professor to put some of the copies on reserve. You knowabout the ‘Reserve system’, right?Student:I know that you have to read reserve books in the library and that you have timelimits. But I didn’t know that I could ask a professor to put a book on the reserve. Imean I thought the professors make that kind of decisions at the beginning of the semester.Librarian:Oh… they can put books on reserve at anytime during the semester.Student:You know reserving book seems a bit unfair. What if someone who is not in the classwants to use the book?Librarian:That’s why I said some copies.Student:Ah, well, I’ll certainly talk to my professor about it tomorrow. But what I am gonna dotonight?Librarian:I guess you could walk around the Poli-Sci ----- ‘Political Science’ section and look atthe books waiting to be re-shelved.Student:There are do seem to be more than normal.Librarian:We are a little short of staff right now. Someone qui t recently, so things aren’t gettingre-shelved as quickly as usual. I don’t think they’ve hired replacement yet, so, yeah,the un-shelved books can get a bit out of hand.Student:This may sound a bit weird. But I’ve been thinking about getting a job. Um… I’venever worked at the library before, But…..Librarian:That’s not a requirement. The job might still be open. At the beginning of the semester we were swamped with applications, but I guess everyone who wants thejob has one by now.Student:What can you tell me about the job?Librarian:Well, we work between six and ten hours a week, so it’s a reasonable amount.Usually we can pick the hours we want to work. But since you’d be starting so late inthe semester, I’m not sure how that would work for you. And… Oh… we get paid thenormal university rates for student employees.Student:So who do I talk to?Librarian:I guess you talk to Dr. Jenkins, the head librarian. She does the hiring.TPO 14 Lecture 1 PsychologyNarrator:Listen to part of a lecture in a psychology classProfessor:We’ve said that the term “Cognition” refers to mental states like: knowing and believing, and to mental processes that we use to arrive at those states. So forexample, reasoning is a cognitive process, so it’s perc eption. We use information thatwe perceive through our senses to help us make decisions to arrive at beliefs and soon. And then there are memory and imagination which relate to the knowledge of things that happen in the past and may happen in the future. So perceiving,remembering, imagining are all internal mental processes that lead to knowing or believing. Yet, each of these processes has limitations, and can lead us to hold mistaken believes or make false predictions. Take memory for example, maybe youhave heard of studies in which people hear a list of related words. Ah…, let`s say a listof different kinds of fruit. After hearing this list, they are presented with several additional words. In this case, we`ll say the additional words were “blanket” and “cheery”. Neither of these words was on the original list, and, well, people will claimcorrectly that “blanket” was not on the original list, they’ll also claim incorrectly thatthe word “cheery” was on the list. Most people are convinced they heard the word “cheery” on the original list. Why do they make such a simple mistake? Well, we think because the words on the list were so closely related, the brain stored only thegist of what they heard. For example, that all the items on the list were types of thefruit. When we tap our memory, our brains often fill in details and quite often thesedetails are actually false. We also see this “fill-in” phenomenon with perception.Perception is the faculty that allows us to process information in the present as we take it via our senses. Again, studies have shown that people will fill in informationthat they thought they perceived even when they didn`t. For example, experimentshave been done where a person hears a sentence, but it is missing the word, that lo gically completes it. They’ll claim to hear that word even though it was never said.So if I were to say…er…the sunrise is in the…and then fill to complete the sentence,people will often claim to have heard the word “east”.In cognitive psychology, we hav e a phrase for this kind of inaccurate “filling in of details”--- it’s called: A Blind Spot. The term originally refers to the place in our eyeswhere the optic nerve connects the back of the eye to the brain. There are no photoreceptors in the area where the nerve connects to the eye. So that particular area ofthe eye is incapable of detecting images. It produces “A Blind Spot” in our field vision.We are unaware of it, because the brain fills in what it thinks belongs in its image, sothe picture always appears complete to us. But the term “blind spot” has also takenon a more general meaning--- it refers to people being unaware of a bias that may affect their judgment about the subject. And the same “blind-spot phenomenon”that affects memory and perception also affects imagination. Imagination is a facultythat some people use to anticipate future events in their lives. But the ease with which we imagine details can lead to unrealistic expectations and can bias our decisions.So…er…Peter, suppose I ask you to image a lunch salad, no problem, right? But I betyou imagine specific ingredients. Did yours have tomatoes, Onion, Lettuce? mine did?Our brains fill in all sorts of details that might not be part of other people’s image of asalad, which could lead to disappointment for us. If the next time we order a salad ina restaurant, we have our imagined salad in mind, that’s not necessarily what we’llget on our plate. The problem is not that we imagine things, but that we assume what we’ve imagined is accu rate. We should be aware that our imagination has thisbuilt-in feature, the blind spot, which makes our predictions fall short of reality.TPO 14 Lecture 2 BiologyNarrator:Listen to part of a lecture in a biology class.Professor:Almost all animals have some way of regulating their body temperature; otherwisethey wouldn’t survive extreme hot or cold conditions---sweating, panting, swimmingto cooler or warmer water; ducking into somewhere cool like a burrow or a hole under a rock; these are just a few. And that’s body is colder or warmer than the surrounding environment, because it’s a microclimate.A microclimate is a group of climate conditions that affect the localized area, weatherfeatures like temperature, wind, moisture and so on. And when I say localized, I mean really localized, because microclimates can be, as the name suggests, pretty small, even less than a square meter. And microclimates are affected by hugenumber of other variables. Obviously weather conditions in the surrounding areas are a factor. But other aspects of the location like, um… the elevation of the land, theplant life nearby, and so on, have a substantial effect on microclimates. And of coursethe human development in the area, eh, a road will affect a nearby microclimate. It’salso interesting to know that microclimates thither or near each other can have verydifferent conditions. In the forest for example, there can be a number of verydifferent microclimates close to each other, because of all the variables I justmentioned.Student:So how does a hole in the ground, a burrow, stay cool in a hot climate?Professor:Well, since cold air sinks, and these spots are shaded, they are usually much coolerthan the surrounding area. And these spots are so important because many animalsrely on microclimates to regulate their body temperature. Hmm, for instance, there isa species of squirrel, in the Western part of the United States that can get really hotwhen they were out foraging for food. So they need a way to cool down. So what’dthey do? They go back to their own burrow. Once they get there, their bodytemperatures decrease very, very quickly. The trip to the burrow prevents thesquirrel from getting too hot.Student:But squirrels are mammals, right? I thought mammals regulate their temperature internally.Professor:Mammals do have the ability to regulate their body temperature, but not all can do itto the same degree, or even the same way. Like when you walk outside on a hot day,you perspire, and your body cools itself down, a classic example of how mammal regulates its own body temperature. But one challenge that squirrels face, well manysmall mammals do, is that because of their size, sweating would make them lose toomuch moisture. They dehydrate. But on the other hand, their small size allows themto fit into very tiny spaces. So for small mammals, microclimates can make a big difference. They rely on microclimates for survival.Student:So cold blood animals, like reptiles, they can’t control their own body temperature,so I can image the effect of microclimate would have on them.Professor:Yes, many reptile insects rely on microclimates to control their body temperature. Alot of reptiles use burrows or stay under rocks to cool down. Of course with reptiles,it’s a balancing act. Staying in the heat for too long can lead to problems, but stayingin the cold can do the same. So reptiles have to be really precise about where they spend their time, even how they position their bodies. And when I say the y’reprecise, I mean it--- some snakes will search out a place under rocks of a specific thickness, because too thin a rock doesn’t keep them cool enough, and too thick a rock will cause them to get too cold. That level of precision is critical to the snake formaintaining its body temperature. And even microscopic organisms rely onmicroclimates for survival.Think about this, decomposing leaves create heat that warms the soil; the warm soilin turn affects the growth, the conditions of organisms there. And those organisms then affect the rate of decomposition of the leaves. So a microclimate can besomething so small and so easily to disturbed that even a tiny change can have a bigimpact. If someone on a hike knocks a couple of rocks over, they could be unwittinglydestroying a microclimate that an animal or organism relies on.TPO 14 Conversation 2Narrator:Listen to a conversation between a student and his faculty adviserAdvisor:Hi ，Steven I schedule this appointment, cause it has been a while since we touch this.Student:I know I have been really busy--- a friend of my works on a school a paper. Heasksme if I would like to try to reporting so I did and I really love it.Advisor:Hey…that's sounds great!Student:Yeah… the first article I wrote it was profile of the chemistry professor---the one whose name teacher the year. My article ran on the front page. When I saw my name, I mean my byline in print, I was hooked. Now I know this is what I want to do--- be a reporter.Advisor:Isn't it great to discover something that you really enjoy? And I read that the articletoo? It was very good.Student:To be honest, the articles got a lot of editing. In fact I barely recognized a couple ofparagraphs. But the editor explained why the changes were made. I learned a lot andmy second article didn't meet nearly many changes.Advisor:Sound like you got a real neck for this.Student:Yeah… anyway, I am glad you schedule this meeting because I want to change mymajor to journalism now.Advisor:Um，the university doesn't offer major in journalism.Student:Oh no…Advisor:But….Student:I… I mean… should I transfer to another school, or major in English?Advisor:Er… wait a minute. Let me explain why the major isn’t offered. Editors at t he newspaper… editors… um… I mean when you apply for a reporting job, editors lookat the two things--- they want to see clips, you know, some of your published articles,though also want to try out, though give you an assignment like… covering a price ofconferences some other event, then see if you can craft the story about it, accurately,on dead line.Student:So they don't even to look at my major?Advisor:It is not that they don't look at it… it is… well, having a degree in something otherthan journalism should actually work to your advantage.Student:How?Advisor:Most journalism specialized these days. They only write about science or business ortechnology for example. Is there a type of reporting you think you may like to specialize then?Student:Well… I think it can be really cool to cover the Supreme Court. I mean… theirdecisionaffects so many people.Advisor:That is really a goal worth striving for. So, why not continue major in political science?And as elective, you could take some Pre-Law classes like Constitution Law, and asfor you work on the student newspaper paper, maybe they let you cover some localcourt cases--- once that the student and professor here would want to read about.Student:Do you know of any？Advisor:I do. Actually, there is case involving this computer software program that one of ourprofessors wrote. The district courts decide in if the university entitle to any of ourprofessors' profits?Student:Wah…. I will definitely follow upon that!TPO 14 Lecture 3 AstronomyNarrator:Listen to part of a lecture in an astronomy class.Professor:OK, last time we talked about ancient agricultural civilizations that observed the starsand then used those observations to keep track of the seasons. But today I want to talk about the importance of stars for early seafarers, about how the fixed patterns of stars were used as navigational aids.OK, you’ve all heard about the Vikings and their impressive navigation skills, but theseafaring people of the pacific islands, the Polynesians and the Micronesians,werequite possibly the world’s greatest navigators. Long before the development of, uh,advanced navigational tools in Europe, pacific islanders were travelling from NewZealand to Hawaii and back again, using nothing but the stars as their navigationalinstruments.Um, the key to the pacific islanders’ success was probably their location near the equator. What that meant was that the sky could be partitioned, divided up, much more symmetrically than it could farther away from the equator. Unlike the Vikings,early observers of the stars in Polynesia or really anywhere along the equator wouldfeel that they were at the very center of things, with the skies to the north and the skies to the south behaving identically, they could see stars going straight up in theeast and straight down in the west. So it was easier to discern the order in the sky than farther north or farther south, where everything would seem more chaotic.Take the case of the Gilbert Islands, they are part of Polynesia, and lie very close tothe equator. And the people there were able to divide the sky into symmetrical boxes,according to the main directions, north, east, south and west. And they couldprecisely describe the location of a star by indicating its position in one of those imaginary boxes. And they realized that you had to know the stars in order tonavigate. In fact there was only one word for both in the Gilbert Islands, when youwanted to the star expert, you ask for a navigator.Um, islanders from all over the pacific learned to use the stars for navigation, and they passed this knowledge down from generation to generation. Some of them utilized stone structures called stone canoes, ah, and these canoes were on land, ofcourse, and you can still see them on some islands today. They were positioned as ifthey were heading in the direction of the points on the sea horizon where certain stars would appear and disappear during the night, and, um, young would-benavigators set by the stones at night and turned in different directions to memorizethe constellations they saw, so they could recognize them and navigate… by them later on when they went out to sea.One important way the Polynesians had for orienting themselves was by using zenithstars. A zenith star was a really bright star that would pass directly overhead atparticular latitude…at a particular distance from the equator, often at a latitude associate with some particular pacific island. So the Polynesians could estimate theirlatitude just by looking straight up, by observing whether a certain zenith star passeddirectly overhead at night, they’d know if they have rates the same latitude as a particular island they were trying to get to. Um, another technique used by the Po lynesians was to look for a star pair, that’s two stars that rise at the same time, orset at the same time, and navigators could use these pairs of stars as reference points,because they rise or set together only at specific latitudes. So navigators might seeone star pair setting together. And, uh…would know how far north or south of the equator they were. And if they kept on going, and the next night they saw the pairsof stars setting separately, then they would know that they were at a different degreeof latitude. So looking at rising and setting star pairs is a good technique. Um…actually it makes more sense with setting stars; they can be watched instead of tryingto guess when they’ll rise.Uh, OK, I think all this shows that navigating doesn’t re ally require fancy navigationalinstruments; the peoples of the pacific islands had such expert knowledge ofastronomy as well as navigation that they were able to navigate over vast stretches ofOpen Ocean. Uh, it's even possible that Polynesian navigators had already sailed tothe Americas, centuries before Columbus.TPO 14 Lecture 4 ArcheologyNarrator:Listen to part of the lecture in the archaeology classProfessor:When we think of large monumental structures built by early societies and Egyptianpyramid probably comes to mind. But there are some even earlier structures in theBritish Isles also worth discussing, and besides the well-known circle of massivestones of Stonehenge which don’t get me wrong is remarkable enough, well, otherimpressive Neolithic structures are found there too. Oh, yes, we are talking about theNeolithic period here, also called new Stone Age, which was the time before stonetools began to be replaced by tools made by bronze and other metals.It was about 5000 years ago, even before the first Egyptian pyramid that some of amazing Neolithic monuments---tombs, were racketed at the very size around ironedGreat Britain and costal islands nearby.I am referring particular to structures that in some cases, look like ordinary naturalhills. But we definitely build by humans, well-organized communities of human’s toenclose a chamber or room within stone walls and sometimes with a high, cleverlydesigned sealing of overlapping stones. These structures are called Passage Graves,because in the chamber, sometime several chambers in fact, could only be entered from the outside through a narrow passage way.Michael:Excuse me, professor, but you said Passage Graves. Was this just monument to honorthe dead buried there or were they designed to be used somehow by the living?Professor:Ah, yes! Good question, Michael. Besides being built as tombs, some of these Passage Graves were definitely what we might call Astronomical Calendars, with chambers they flooded with some light on the certain special days of the year, witchmust see miraculous and inspired good dealer of they really just wonder. Butresearch indicates that not just light but also the physics of sound help to enhance this religious experience.Michael:How so?Professor:Well, first the echoes. When religious leaders started chanting with echoes bouncedoff the stonewalls over and over again, it must seem like a whole chorus of other voices, spirits of God maybe join in. But even more intriguing is what physicistscalledStanding Waves. Basically, the phenomenon of Standing Waves occurs when soundwaves of the same frequency reflect off the walls and meet from opposite directions.So, the volume seems to alternate between very loud and very soft. You can stand quite near a man singing in loud voice and hardly hear him. Yet step little further away and voice is almost defining. As you move around chamber, the volume of thesound goes way up and way down, depending on where you are and these standingwaves. And often the acoustic makes it hard to identify where sounds are coming from. It is powerful voices that are speaking to you or chanting from inside your ownhead. This had to engender powerful sense of all Neolithic worshipers.And another bit of physics I played here is something called Resonance. I know physics, but well I imagine you have all below near of top empty bottles and heardsounds it makes. And you probably notice that depending on its size--- each emptybottle plays one particular music note. Or it is the physics might put it, each bottle resonates at a particular frequency. Well, that’s true of these chambers too. If you make a constant noise inside the chamber, maybe by steadily beating drum at certainrate, a particular frequency of sound will resonate. We will ring out intensely,depending on the size of chamber. In some of large chambers though, theseintensified sound may be too deep for us to hear, we can feel it. We are mysteriouslyagitated by a….but it is not a sound our ears can hear. The psychologic al effects of allthese extraordinary sounds can be profound, especially when they seem sodisconnected from human doing drumming or chanting. And there can be observablephysical effects on people too. In fact, the sounds can cause headaches, feelings ofdizziness, increase heartache, that sort of thing, you see.Anyway, what is we experience inside one of these Passage Graves clearly could befar more intense than everyday reality outside which made them very special places.But back to your question, Michael, as to whether these Graves were designed to beused by the living. Well, certainly, we have got to ask economical or calendarfunction. That seems pretty obvious, and I wanna go into more detail on that now.。

托福听力tpo49lecture1、2、3、4原文+题目+答案+译文Lecture1 (1)原文 (1)题目 (4)答案 (6)译文 (6)Lecture2 (8)原文 (8)题目 (10)答案 (12)译文 (12)Lecture3 (14)原文 (14)题目 (17)答案 (19)译文 (19)Lecture4 (21)原文 (21)题目 (23)答案 (25)译文 (25)Lecture1原文NARRATOR:Listen to part of a lecture in a geology class.MALE PROFESSOR:Alaska is fascinating to geologists because of its incrediblelandscapes.Uh,permafrost has a lot to do with this.That is,the areas where the ground—the soil—is always frozen,except for the very top layer—what we call the active layer of permafrost—which melts in the summer and refreezes again in the winter.The northern part of Alaska is covered in lakes—thousands of them—and most of these are what we call thaw lakes.T-h-a-w.Thaw lakes.I'm gonna show you a few sketches of them in a minute,so you'll have a good idea of what I'm talking about.So, how these thaw lakes are formed has to do with…OK,it starts with ice wedges.The top part of the ice wedge melts—Should I back up?Ice wedges form when water runs into cracks in the ground,the permafrost,then freezes.You ever see mud after it dries?Dried mud has cracks,because when it dries, it contracts,it shrinks.Well,in winter,permafrost behaves similarly.It shrinks in winter,because it freezes even more thoroughly then,and as it shrinks,it forms deep,deep cracks.Then in the summer,when the active layer—the top layer of the permafrost—melts,the melt water runs into those cracks in the permafrost,then freezes again—because that ground,the ground beneath the active layer,is still below freezing.So,you have wedges of ice in the permafrost.Now the ice wedges widen the original cracks in the permafrost,because water expands when it freezes.All right?OK,then in autumn,the active layer on top freezes again.Then in winter,the permafrost starts contracting again and the cracks open up even wider.So the next summer,when the active layer melts again and flows into the widened cracks…and…freezes…it makes the cracks even wider.So it’s sort of a cycle through which the cracks and the wedges grow wider and wider.So when the ice wedge reaches a certain size,its top part—in the active layer—turns into a little pond when it melts in the summer.And that's the beginning of your thaw lake.[pause]There are thousands of them in northern Alaska.One of the most fascinating things about these lakes—and this is important—is that they mostly havethe same shape.Like an elongated oval,or egg shape.And what's more,all the ovals are oriented in the same way.Here's an idea of what they look like,what the landscape looks like from an aerial view,with the lakes side by side.There's been considerable research done to try to figure out what causes them to be shaped and oriented this way.We know that the shape and orientation are caused by the way the lakes grow once they're formed,but the question is,what makes them grow this way?One theory sees winds as the cause.This region of Alaska has strong winds that blow perpendicular to the lakes.What happens is,wind blows straight into the longer side of the lakes.Now,wouldn’t that erode the lake bank in that direction?The same direction as the wind?Well…no.Actually,what happens is that the waves caused by the winds build a sorta protective layer of sediment—it's called a“protective shelf”—along the bank of the lake directly in front of them;so that bank is shielded from erosion,and the waves are diverted to the sides,to the left and to the right,and that’s why the left and the right banks start eroding.Get it?The bank straight ahead is protected,but the lake currents--the waves--erode the banks to the sides.That's the current model,um,the wind erosion model,which is generally accepted.But,there's a new theory that says that[deliberately]thaw slumping,not wind,is what shapes the thaw lakes.Thaw slumping,um…OK.Sometimes,in the summer,the temperature rises pretty quickly.So the active layer of permafrost thaws faster than the water can drain from the soil.So the sides of the thaw lakes get,like,mushy,and slump,or slide,into the lake.Then,the lake water spreads out more,and the lake gets bigger,OK?Also,in that part of Alaska,the terrain is gently sloped,so the lakes are all on an incline.Here.Now,this is an exaggeration of the angle—the hill isn't this steep—butsee how with the lake's banks,the side that is farther downhill…it's smaller,lower. This short bank thaws faster than the tall one does,so it falls into the lake—it slumps, much more and much faster than the other bank.When the short banks of many lakes slump,they move farther downhill and the lakes grow—all in the same downhill direction.This is a new theory,so it hasn't been tested much yet.In field studies,when we've looked at the banks of these thaw lakes,there's not much evidence of slumping. We'd expect to see cliff-like formations there,from the slumping,but we haven't really found many of those.题目1.What is the main purpose of the lecture?[Click on two answers.]A.To contrast how different kinds of thaw lakes growB.To explain why a new theory of thaw lakes is gaining acceptanceC.To explain how processes in permafrost lead to the formation of thaw lakesD.To describe two competing theories about the growth of thaw lakes2.The professor explains thaw lake formation as a cycle of events that occur repeatedly.Summarize this cycle,starting with the event filled in below.[Click on a sentence.Then drag it to the space where it belongs.The first one is done for you. One sentence will not be used]A.Meltwater flows into cracks in permafrostB.Ice wedges inside permafrost completely meltC.Freezing water expands cracks in permafrostD.Ice in the active layer melts as temperatures riseE.Permafrost shrinks and cracks as temperatures drop..3.What is the significance of the'protective shelf'discussed by the professor?A.It prevents the slumping of lake banks.B.It shields the lake surface from strong winds.C.It redirects the waves to lake banks that do not face the wind.D.It allows the lakes to grow in the same direction as the wind blows.4.According to the thaw slumping model,which side of a thaw lake grows fastest?A.The side where the bank is shortestB.The side least exposed to windC.The side that is at the highest elevationD.The side opposite the protective shelf5.What is the professor's opinion of the thaw slumping model?A.He thinks it was urgently needed.B.He is not convinced that it has a firm basis.C.He thinks it would be better if it were simplified.D.He does not think it is very different from the old model.6.Why does the professor say this:You ever see mud after it dries?A.He wants some information from the students.B.He thinks that the students may find an example helpful.C.He realizes that he forgot to mention an important topic.D.He wants to point out an important difference between frozen ground and dry ground.答案CD EDACB C A B B译文听一段地质学的讲座。

【托福听力资料】托福TPO14听力文本——Lecture 4众所周知，托福TPO材料是备考托福听力最好的材料。

相信众多备考托福的同学也一直在练习这套材料，那么在以下内容中我们就为大家带来托福TPO听力练习的文本，希望能为大家的备考带来帮助。

TPO 14 Lecture 4 ArcheologyNarrator: Listen to part of a lecture in an archaeology classProfessor:When we think of large monumental structures built by early societies, an Egyptian pyramid probably comes to mind. But there are some even earlier structures in the British Isles also worth discussing, and besides thewell-known circle of massive stones of Stonehenge, which don’t get me wrong is remarkable enough, well, other impressive Neolithic structures are found there too. Oh, yes, we are talking about the Neolithic period here, also called new Stone Age, which was the time before stone tools began to be replaced by tools made of bronze and other metals. It was about 5000 years ago, even before the first Egyptian pyramid that some amazing Neolithic monuments---tombs, were erected at various sites around Ireland, Great Britain and coastal islands nearby.I am referring particular to structures that in some cases, look likeordinary natural hills but were definitely built by humans, well-organized communities of humans to enclose a chamber or room within stone walls and sometimes with a high, cleverly designed ceiling of overlapping stones. These structures are called Passage Graves, because the inner chamber, sometimesseveral chambers in fact, could only be entered from the outside through a narrow passageway.Michael: Excuse me, professor, but you said Passage Graves. Were these just monuments to honor the dead buried there or were they designed to be used somehow by the living?Professor: Ah, yes! Good question, Michael. Besides being built as tombs, some of these Passage Graves were definitely what we might call Astronomical Calendars, with chambers that were flooded with sunlight on certain special days of the year, which must’ve have seemed miraculous and inspired a good deal of religious wonder. But research indicates that not just light but also the physics of sound helped enhance this religious experiences.Michael: How so?Professor:Well, first the echoes. When a religious leader started chanting with echoes bouncing off the stonewalls over and over again, it must’ve seemed like a whole chorus of other voices, spirits of Gods maybe, joining in.But even more intriguing is what physicists calledStanding Waves. Basically, the phenomenon of Standing Waves occurs when sound waves of the same frequency reflect off the walls and meet from opposite directions. So, the volume seems to alternate between very loud and very soft. You can stand quite near a man singing in loud voice and hardly hear him. Yetstep a little further away and his voice is almost deafening. As you move around the chamber, the volume of the sound goes way up and way down, depending on where you are in these standing waves. And often the acoustics make it hard to identify where sounds are coming from. It’s as if powerful voices are speaking to you or chanting from inside your own head. This had to engender a powerful sense of awe in Neolithic worshipers.And another bit of physics at play here is something called Resonance. I am no physicist, but well I imagine you have all blown air over the top of an empty bottle and heard the sound it makes. And you’ve probably noticed that depending on its size--- each empty bottle plays one particular musical note. Or as a physicist might put it, each bottle resonates at a particular frequency. Well, that’s true of these chambers too. If you make a constant noise inside the chamber, maybe by steadily beating drum at a certain rate, a particular frequency of sound will resonate, will ring out intensely, depending on the size of the chamber. In some of the larger chambers though, these intensified sound may be too deep for us to hear, we can feel it. We are mysteriously agitated by it….but it is not a sound our ears can hear.The psychological effects of all these extraordinary sounds can be profound, especially when they seem so disconnected from the human doing the drumming or chanting. And there can be observable physical effects on people too. In fact, the sounds can cause headaches, feelings of dizziness, increased heart rate, that sort of thing, you see. Anyway, what was experienced inside one of thesePassage Graves clearly could be far more intense than the everyday realityoutside, which made them very special places.But back to your question, Michael, as to whether these Graves were designed to be used by the living. Well, certainly, with regard to astronomical orcalendar function. That seems pretty obvious, and I wanna go into more detail onthat now.。

【托福听力资料】托福TPO15 听力文本-Lecture 4众所周知，托福TPO材料是备考托福听力最好的材料。

相信众多备考托福的同学也一直在练习这套材料，那么在以下内容中我们就为大家带来托福TPO听力练习的文本，希望能为大家的备考带来帮助。

TPO 15 Lecture 4 BiologyNarrator: Listen to part of a lecture in a biology class.Professor:OK. We’ve been talking till now about the two basic needs of a biologicalcommunity – an energy source to produce organic materials, you know uh, food forthe organisms, and the waste recycling or breakdown of materials back intoinorganic molecules, and about how all this requires photosynthesis when greenplants or microbes convert sunlight into energy, and also requiresmicroorganisms, bacteria, to secrete chemicals that break down or recycle theorganic material to complete the cycle. So, now we are done with this chapter ofthe textbook, we can just review for the weekly quiz and move on to the nextchapter, right? Well, not so fast. First, I ‘d like to talk about somediscoveries that have challenged one of these fundamental assumptions about whatyou need in order to have a biological community.And, well, there actually were quite a few surprises. It all began in 1977with the exploration of hydrothermal vents on the ocean floor. Hydrothermalvents are cracks in the Earth’s surface that occur, well, the ones we aretaiking about here are found deep at the bottom of the ocean. And these vents onthe ocean floor, they release this incredibly hot water, 3 to 4 times the temperature that you boil water at, because this water has been heated deep within the Earth.Well about 30 years ago, researchers sent a deep-sea vessel to explore the ocean’s depth, about 3 kilometers down, way deep to the ocean floor, No one had ever explored that far down before. Nobody expected there to be any life down there because of the conditions.First of all, sunlight doesn’t reach that far down so it ’ s totally dark. There couldn’t be any plant or animal life since there’s no sunlight, no source of energy to make food. If there was any life at all, it’d just be some bacteria breaking down any dead materials that might have fallen to the bottom of the ocean . And?Student 1 ：And what about the water pressure? Didn ’ t we talk before about how the deeper down into the ocean you go, the greater the pressure? Professor ：Excellent point! And not only the extreme pressure, but also the extreme temperature of the water around these vents. If the lack of sunlight didn’t rule out the existence of a biological community down there then these factors certainly would, or so they thought.Student 2：So you are telling us they did find organisms that could live under those conditions?Professor: They did indeed, something like 300 different species.Student 1 ：But... but how could that be? I mean without sunlight, no energy,no no …Protessor:What they discovered was that microorganisms, bacteria, had taken over both functions of the biological community - the recycling of waste materials and the production of energy. They were the energy source. You see, it turns out that certain microorganisms are chemosynthetic - they don’t need sunlight because they take their energy from chemical reactions.So, as I said, unlike green plants which are photosynthetic and get their energy from sunlight, these bacteria that they found at the ocean floor, these are chemosynthetic, which means that they get their energy from chemical reactions. How does this work?As we said, these hydrothermal vents are releasing into the ocean depth this intensely hot water and here is the thing, this hot water contains a chemical called hydrogen sulfide, and also a gas , carbon dioxide. Now these bacteria actually combine the hydrogen sulfide with the carbon dioxide and this chemical reaction is what produces organic material which is the food for larger organisms. The researchers had never seen anything like it before.Student 2 : Wow! So just add a chemical to a gas, and bingo, you ’ ve got a food supply?ProfessorNot just that! W hat was even more surprising were all the large organisms that lived down there. The most distinctive of these was something called thetube worm. Here, let me show you a picture . The tube of the tube worm is really, really long. They can be up to one and a half meters long , and these tubes are attached to the ocean floor, pretty weird looking, huh?And another thing, the tube worm has no mouth or digestive organs. So you are asking how does it eat? Well, they have these special organs that collect the hydrogen sulfide and carbon dioxide and then transfer it to another organ, where billions of bacteria live. These bacteria that live inside the tube worms, the tube worms provide them with hydrogen sulfide and carbon dioxide. And the bacteria, well the bacteria kind of feed the tube worms through chemosynthesis, remember, that chemical reaction I described earlier.。

TPO1-3听力题目托福TPO 1-3 Listening QuestionsTPO1 Lecture 1 5TPO1 Lecture 2 6TPO1 Conversation 2 8TPO1 Lecture 3 8TPO1 Lecture 4 9TPO2 Conversation 1 11TPO2 Lecture 1 11TPO2 Lecture 2 12TPO2 Conversation 2 13TPO2 Lecture 3 14TPO2 Lecture 4 15TPO3 Conversation 1 16TPO3 Lecture 1 17TPO3 Lecture 2 18TPO3 Conversation 2 19TPO3 Lecture 3 20TPO3 Lecture 4 21TPO4 Conversation 1 22TPO4 Lecture 1 23TPO4 Lecture 2 24TPO4 Conversation 2 25TPO4 Lecture 3 26TPO4 Lecture 4 27TPO5 Conversation 1 29TPO5 Lecture 1 29TPO5 Lecture 2 30TPO5 Conversation 2 32TPO5 Lecture 3 32TPO5 Lecture 4 33TPO6 Conversation 1 35TPO6 Lecture 1 36TPO6 Lecture 2 37TPO6 Conversation 2 38TPO6 Lecture 3 38TPO7 Conversation 1 41 TPO7 Lecture 1 41 TPO7 Lecture 2 42 TPO7 Conversation 2 43 TPO7 Lecture 3 44 TPO7 Lecture 4 45 TPO8 Conversation 1 46 TPO8 Lecture 1 47 TPO8 Lecture 2 49 TPO8 Conversation 2 50 TPO8 Lecture 3 51 TPO8 Lecture 4 52 TPO9 Conversation1 54 TPO9 Lecture 1 55 TPO9 Lecture 2 56 TPO9 Conversation 2 57 TPO9 Lecture 3 58 TPO9 Lecture 4 59 TPO10 Conversation 1 61 TPO10 Lecture 1 63 TPO10 Lecture 2 64 TPO10 Conversation 2 65 TPO10 Lecture 3 66 TPO10 Lecture 4 67 TPO11 Conversation 1 69 TPO11 Lecture 1 70 TPO11 Lecture 2 71 TPO11 Conversation 2 72 TPO11 Lecture 3 73 TPO11 Lecture 4 74 TPO12 Conversation 1 75 TPO12 Lecture 1 76 TPO12 Lecture 2 77 TPO12 Conversation 2 78 TPO12 Lecture 3 79 TPO12 Lecture 4 80 TPO13 Conversation 1 81TPO13 Lecture 2 83 TPO13 Conversation 2 85 TPO13 Lecture 3 86 TPO13 Lecture 4 87 TPO14 Conversation 1 88 TPO14 Lecture 1 89 TPO14 Lecture 2 91 TPO14 Conversation 2 92 TPO14 Lecture 3 93 TPO14 Lecture 4 94 TPO15 Conversation 1 95 TPO15 Lecture 1 96 TPO15 Lecture 2 97 TPO15 Conversation 2 99 TPO15 Lecture 3 100 TPO15 Lecture 4 101 Tpo16 Conversation 1 102 TPO16 Lecture 1 103 TPO16 Lecture 2 105 TPO16 Conversation 2 106 TPO16 Lecture 3 107 TPO16 Lecture 4 108 Tpo-17 Conversation 1 110 TPO17 Lecture 1 111 TPO17 Lecture 2 112 TPO 17 Conversation 2 113 TPO 17 Lecture 3 114 TPO17 Lecture 4 115 TPO 18 Conversation 1 117 TPO 18 Lecture 1 117 TPO 18 Lecture 2 118 TPO 18 Conversation 2 119 TPO 18 Lecture 3 119 TPO 18 Lecture 4 120 TPO 19 Conversation 1 121 TPO 19 Lecture 1 122 TPO 19 Lecture 2 123TPO 19 Conversation 2 124TPO 19 Lecture 3 125TPO 19 Lecture 4 126TPO 20 Conversation 1 127TPO 20 Lecture 1 128TPO 20 Lecture 2 129TPO 20 Conversation 2 130TPO 20 Lecture 3 131TPO 20 Lecture 4 133TPO 21 Conversation 1 134TPO 21 Lecture 1 135TPO 21 Lecture 2 136TPO 21 Conversation 2 137TPO 21 Lecture 3 138TPO 21 Lecture 4 139TPO 22 Conversation 1 140TPO 22 Lecture 1 141TPO 22 Lecture 2 142TPO 22 Conversation 2 143TPO 22 Lecture 3 144TPO 22 Lecture 4 145TPO 23 Conversation 1 146TPO 23 Lecture 1 148TPO 23 Lecture 2 149TPO 23 Conversation 2 151TPO 23 Lecture 3 152TPO 23 Lecture 4 153TPO 24 Lecture 4 156TPO1 Conversation 11. Why does the student go to see the librarian?To sign up for a seminar on using electronic sources for research To report that a journal is missing from the reference areaTo find out the procedure for checking out journal articlesTo ask about how to look for resources for a class paper2.What does the librarian say about the availability of journals and articles in the library?They are not easy to find if a professor put them on reserveMost of them are accessible in an electronic formatMost of them can be checked out for three weeksPrinted versions from the past three years are located in the reference section.3.What does the librarian suggest the student should do to save time?Choose an easier research topicConcentrate on five journalsRead the summaries of the articles firstInstall a new program on her home computer4.What can be inferred about why the woman decides to use the computer in the library? She thinks she might need additional help from the manShe does not have a computer at homeShe has to hand in her assignment by the end of the dayShe will be meeting a friend in the library later on5.Why does the woman say this()She had forgotten about the informationShe is surprised she was not aware of the informationShe is annoyed that the information was published only recentlyShe is concerned that the librarian gave her incorrect informationTPO1 Lecture 16.What is the purpose of the lecture?To explain the difference between two artistic stylesTo describe a new art gallery to the classTo introduce an artist's work to the classTo show how artists' styles can evolve over time7.What does the professor say about Frantzen's painting of a farm scene?It resembles a photographIt may be Frantzen's best known paintingIt was painted in the Impressionist styleIt was painted while Frantzen lived abroad8.Why did Frantzen go to the Sales Barn?To study human form and movementTo earn money by painting portraitsTo paint farm animals in an outdoor settingTo meet people who could model for her paining9.What does the professor imply about the painting of the young woman surrounded by pumpkins?It was painted at an art fairIt combines Impressionism with RealismIt convinced Frantzen that she was a good illustratorIt was originally meant to be used in an advertisement10.Why does the professor discuss Frantzen's difficulties as a young painter?He wants to point out mistakes that young artists commonly makeHe thinks her example can inspire the students in their own livesHer difficulties remind him of the difficulties he himself experienced as a young girl Her difficulties are the subject of some of the paintings in the gallery that the students will visit11.What does the professor imply when he says this()The students can understand Frantzen's art without knowing about her lifeThe students should pay very close attention to what he is going to saySome of his students are already familiar with Frantzen's life storySome of his students may not appreciate Frantzen's workTPO1 Lecture 212.What does the professor mainly discuss?The difference in age among American mountain rangesThe importance of a technique used for dating geological materialsThe recent discovery of an ancient canyonA comparison of various minerals used for dating13.Before the use of uranium-lead analysis, where did most geologists think the Grand Canyon sandstone came from?An ancient lake located in the American SouthwestA desert that once connected two continentsSands carried by a river from the Appalachian MountainsA nearby mountain range that had flattened out over time14.In the talk, the professor describes the sequence of uranium-lead dating. Summarize the sequence by putting the events in the correct order.Drag your answer choices to spaces where they belong. To remove an answer choice, click on itZircon in the sandstone is matched to the zircon in a particular mountain range.The amount of lead in sandstone zircon is measuredThe age of zircon in a sandstone sample is determined12315.According to the professor, what change has caused uranium-lead dating to gain popularity recently?It can be performed outside a laboratoryIt can now be done more efficientlyIt no longer involves radioactive elementsIt can be used in fields other than geology16.Why does the professor talk about the breaking apart of Earth's continents?To give another example of how uranium-lead dating might be usefulTo explain how the Grand Canyon was formedTo demonstrate how difficult uranium-lead dating isTo disprove a theory about the age of Earth's first mountain ranges17.What does the professor imply when he says this()The class is easier than other geology classesThe class has already studied the information he is discussingSome students should take a course in geological dating techniquesHe will discuss the topic later in the classTPO1 Conversation 21.What is the conversation mainly aboutA lesson Matthew prepared for his studentsA class Matthew has been observingA term paper that Matthew has writtenA problem in Matthew's classroom2.What is Matthew's opinion about observing Mr.Grabell's third-grade class? It will help him become a more effective teacherIt could help improve his study habitsIt has improved his public-speaking skillsIt may be the most difficult assignment he has had3.Why does Matthew mention Greek and Roman mythology?To identify a topic frequently discussed in third gradeTo get the professor's opinion about a lesson he taughtTo make a suggestion to improve the class he is takingTo illustrate a technique used to teach a third-grade class4.What important skills did Mr.Grabell introduce to his third-grade class?Click on 3 answersReviewing other student's reportsUsing books in the libraryInterviewing their classmatesSpeaking in publicWriting reports5.What will Matthew probably do in next Wednesday's class?Hand in his assignment earlyTry to start a study groupMake a presentation to the classChoose a topic for his paperTPO1 Lecture 36.What is the lecture mainly about?Art in the Neolithic periodThe site of a Neolithic townMethods of making stone toolsThe domestication of plants and animals by early farmers7.What does the professor imply about the tools used by the people of Catalhoyuk?They were made of stone that came from CatalhoyukThey were among the sharpest tools available at the timeThey were often used in religious ritualsThey were used primarily for agriculture8.What does the professor say about the entrances to the horses in Catalhoyuk?Click on 2 answersThey were in the roofThey were usually kept closedThey allowed smoke to escape from the houseThey stood opposite one another across narrow streets9.What does the professor say about Catalhoyuk graves?The graves contained precious stonesMany people were buried in each graveThe grave were located under the house floorsThe graves contained ashes rather than bones10.What does the professor think of the idea that the inhabitants of Catalhoyuk deliberately arranged their house so that they could live near their ancestors' graves?She thinks it is a good guess, but only a guessShe thinks some evidence supports it, but other evidence contradicts it.She thinks that further excavations will soon disprove itShe thinks that it is not appropriate to make such guesses about the distant past11.What are three things the professor says about the artwork of Catalhoyuk? Click on 3 answersIt was clearly important to the Catalhoyuk religionIt became covered with sootIt often shows farmers at workIts significance is unknownIt contains many hunting scenesTPO1 Lecture 412.What is the main topic of the lectureThe types of habitats marmots preferMethods of observing marmot behaviorFeeding habits of some marmot speciesDifferences in behavior between marmot species13.According to the case study, why are marmots ideal for observationThey do not hide from humansThey reside in many regions throughout North AmericaThey are active in open areas during the dayTheir burrows are easy to locate14.Drag the appropriate description of each marmot species' behavior to the box below the marmot's nameClick on a phrase. Then drag it to the space where it belongs.One of the phrases will not be usedDisplays aggressive tendencies is family oriented says active during the winterOlympic Marmot Eastern Marmot15.What reason does the professor give for the difference in marmot behaviour patterns?Type of food availableThe size of the populationInteraction with other marmot speciesAdaptations to the climate16.Why does the professor say this()To inform the student that his definition is incorrectTo suggest that the student did not do the readingTo encourage the student to try againTo change the topic of discussion17.Why does the professor say this()To express a similar concernTo encourage the student to explain what she meansTo address the student's concernTo agree with the studentTPO2 Conversation 11.Why does the man go to see his professorTo borrow some charts and graphs from herTo ask her to explain some statistical proceduresTo talk about report he is writingTo discuss a grade he got on a paper2.What information will the man include in his report?Click in the correct box for each phraseInclude in report Not include in reportClimate chartsInterviews with meteorologistsJournals notesStatistical tests3.Why does the professor tell the man about the appointment at the doctor's office? To demonstrate a way of remembering thingsTo explain why she needs to leave soonTo illustrate a point that appears in his reportTo emphasize the importance of good health4.What does the professor offer to do for the manHelp him collect more data in other areas of the stateSubmit his research findings for publicationGive him the doctor's telephone numberReview the first version of his report5.Why does the professor say this()To question the length of the paperTo offer encouragementTo dispute the data sourcesTo explain a theoryTPO2 Lecture 16.What is the professor mainly discussingThe development of motor skills in childrenHow psychologists measure muscle activity in the throatA theory about the relationship between muscle activity and thinkingA study on deaf people's problem-solving techniques7.Why does the professor say this()To give an example of a laryngeal habitTo explain the meaning of a termTo explain why he is discussing laryngeal habitsTo remind students of a point he had discussed previously8.Why does the professor say about people who use sign languageIt is not possible to study their thinking habitsThey exhibit laryngeal habitsThe muscles in their hands move when they solve problemsThey do not exhibit ideomotor action9.What point does the professor make when he refers to the university libraryA study on problem solving took place thereStudents should go there to read more about behaviorismStudents' eyes will turn toward it if they think about itHe learned about William James' concept of thinking there10.The professor describes a magic trick to the class,what does the magic trick demonstrate?An action people make that they are not aware ofThat behaviorists are not really scientistsHow psychologists study childrenA method for remembering locations11.What is the professor's opinion of the motor theory of thinkingMost of the evidence he has collected contradicts itIt explains adult behavior better than it explains child behaviorIt is the most valid theory of thinking at the present timeIt cannot be completely proved or disprovedTPO2 Lecture 212.What aspect of Manila hemp fibers does the professor mainly discuss in the lectureSimilarities between cotton fibers and manila hemp fibersVarious types of manila hemp fibersThe economic importance of Manila hemp fibersA use of Manila hemp fibers13.Why does the professor mention going away for the weekend?To tell the class a jokeTo apologize for not completing some workTo introduce the topic of the lectureTo encourage students to ask about her trip14.What does the professor imply about the name Manila hempIt is a commercial brand namePart of the name is inappropriateThe name has recently changedThe name was first used in the 1940's15.Why does the professor mention the Golden Gate Bridge?To demonstrate a disadvantage of steel cablesTo give an example of the creative use of colorTo show that steel cables are able to resist salt waterTo give an example of a use of Manila hemp16.According to the professor, what was the main reason that many ships used Manila hemp ropes instead of steel cables?Manila hemp was cheaperManila hemp was easier to produceManila hemp is more resistant to salt waterManila hemp is lighter in weight17.According to the lecture, what are two ways to increase the strength or rope made from Manila hemp fibers?Click on 2 answersCoat the fibers with zinc-based paintCombine the fibers into bundlesSoak bundles of fibers in salt waterTwist bundles of fibersTPO2 Conversation 21.What are the students mainly discussing?Click on 2 answersTheir courses for next semesterTheir plans for the weekendA poetry clubA class assignment2.What does the man plan to do at the end of the monthRegister for classesFinish writing his master's thesisLeave his job at the coffee shopTake a short vacation3.Why does the man talk to the woman about the "Poetry Kitchen"?To find out how often the club meetsTo inform her that the date of the next meeting has changedTo complain that not enough people are reading their poemsTo encourage her to attend4.What is the woman's attitude toward participating in the poetry club?She is looking forward to hearing her professor's poetryShe is interested in attending but she has no timeShe thinks the poetry that is read there is not very goodShe used to participate but did not enjoy it5.What will the students do in the summerThey will both take coursesThey will both have full-time jobsThey will travel to England togetherThey will teach a class togetherTPO2 Lecture 36.What is the main purpose of the lecture?To illustrate the importance of extrinsic valuesTo explain Aristotle's views about the importance of teachingTo explain why people change what they valueTo discuss Aristotle's views about human happiness7.The professor gives examples of things that have value for her. Indicate for each example what type of value it has for her.Click in the correct box. This question is worth 2 points.Only extrinsic value Only intrinsic value Both extrinsic and intrinsic value TeachingExercisehealthPlaying a musical instrument8.Why is happiness central to Aristotle's theory?Because it is so difficult for people to attainBecause it is valued for its own sake by all peopleBecause it is a means to a productive lifeBecause most people agree about what happiness is9.According to the professor, why does Aristotle think that fame cannot provide true happiness?Fame cannot be obtained without help from other peopleFame cannot be obtained by all peopleFame does not last foreverPeople cannot share their fame with other people10.What does the professor mean when she says this()Teaching is not a highly valued profession in societyShe may change professions in order to earn more moneyThe reason she is a teacher has little to do with her salaryMore people would become teachers if the salary were higher11.What is Bode's law?A law of gravitationAn estimate of the distance between Mars and JupiterA prediction of how many asteroids there areA pattern in the spacing of the planetsTPO2 Lecture 412.Why does the professor explain Bode's Law to the class?To describe the size of the asteroidsTo explain who the asteroids belt was discoveredTo explain how gravitational forces influence the planetsTo describe the impact of telescopes on astronomy13.How does the professor introduce Bode's Law?By demonstrating how it is derived mathematicallyBy describing the discovery of UranusBy drawing attention to the inaccuracy of a certain patternBy telling the names of several of the asteroids14.According to the professor, what two factors contributed to the discovery of the asteroid Ceres?Click on 2 answersImproved telescopesAdvances in mathematicsThe discovery of a new starThe position of Uranus in a pattern15.What does the professor imply about the asteroid belt?It is farther from the Sun than UranusBode believed it was made up of small starsIt is located where people expected to find a planetCeres is the only one of the asteroids that can be seen without a telescope16.Why does the professor say thisTo introduce an alternative application of Bode's LawTo give an example of what Bode's law cannot explainTo describe the limitaions of gravitational theoryTo contrast Bode's Law with a real scientific lawTPO3 Conversation 1Q1Why does the women come to the office?To notify the university of her change of addressTo find out where her physics class is being heldTo get directions to the science buildingTo complain about her physics class being canceledQ2What happened to the letter the university sent to the woman?She threw it away by mistakeHer roommate forgot to give it to herIt was sent to her old mailing addressIt was sent to another student by mistakeQ3Why was the woman’s physics class canceled?Not enough students signed up to take the classNo professors were available to teach the classThe university changed its requirements for physics studentsThere were no classrooms available in the science building at the hourQ4What does the man suggest the woman do before the beginning of next semester? Consult with her advisor about her class scheduleCheck with the registrar’s office about the location of the classRegister for her classes earlyCall the physics departmentQ5RWhat does the man imply when he say this:He know the physics class has been canceledHe is not sure where the science building isMany of the room assignments have been changedThe women can check for herself where her class isTPO3 Lecture 1Q6What does the professor mainly discuss?Major changes in the migratory patterns of hummingbirdsThe adaptation of hummingbirds to urban environmentsConcern about the reduction of hummingbird habitatThe impact of ecotourism on hummingbird populationsQ7What does the professor imply might cause a decrease in the hummingbird population?An increase in the ecotourism industryAn increase in the use of land to raise crops and cattleA decrease in banding studiesA decrease in the distance traveled during migrationQ8What does the professor say people have done to help hummingbirds survive?They have built a series of hummingbird feeding stationsThey have supported new laws that punish polluters of wildlife habitatsThey have replanted native flowers in once polluted areasThey have learned to identify various hummingbird speciesQ9What way of collecting information about migrating hummingbirds does the professor mention?Receiving radio signals from electronic tracking devicesBeing contacted by people who recapture banded birdsCounting the birds that return to the same region every yearComparing old and young birds’ migration routesQ10What does the professor imply researchers have learned while studying hummingbird migration?Hummingbirds have totally disappeared from some countries due to recent habitat destructionPrograms to replant flowers native to hummingbird habitats are not succeeding Some groups of hummingbirds have changed their migration patternsSome plant species pollinated by hummingbirds have become extinctQ11RWhat does the professor imply when she say this:There is disagreement about the idea she has presentedShe does not plan to discuss all the detailsHer next point may seem to contradict what she has just saidThe point she will make next should be obvious to the studentsTPO3 Lecture 2Q12What is the main purpose of the lecture?To discuss the style of an early filmmakerTo describe different types of filmmaking in the 1930sTo discuss the emergence of the documentary filmTo describe Painleve’s influence on today’s science-fiction filmsQ13Why are Painleve’s films typical of the films of the 1920s and 1930s?They do not have soundThey are filmed underwaterThey are easy to understandThey difficult to categorizeQ14According to the professor, how did Painleve’s film confuse the audience?They show animals out of their natural habitatThey depict animals as having both human and animal characteristicsThe narration is scientific and difficult to understandThe audiences of the 1920s and 1930s were not used to films shot underwaterQ15Why does the professor mention sea horses?To explain that they were difficult to film in the 1930sTo point out that Cousteau made documentaries about themTo illustrate Pianleve’s fascination with unusual animalsTo explain why Painleve’s underwater films were not successfulQ16Why does the professor compare the film style of Jacques Cousteau and Jean Painleve?To explain how Painleve influenced CousteauTo emphasize the uniqueness of Painleve’s filming styleTo emphasize the artistic value of Cousteau’s documentary filmsT o demonstrate the superiority of Painleve’s filmmaking equipmentQ17RWhat does the student imply when he say this:He does not like Jean Painleve’s filmsHe thinks that the professor should spend more time discussing Jacques Cousteau’s filmHe believes that high quality filmmakers are usually well knownHe believes that Jean Painleve’s film have been unfairly overlookedTPO3 Conversation 2Q1Why does the student go to see the professor?To ask about a class assignmentTo find out about a midsemester projectTo get information about summer jobsTo discuss ways to improve his gradeQ2What was originally located on the site of the lecture hall?A farmhouseA pottery factoryA clothing storeA bottle-manufacturing plantQ3What is mentioned as an advantage of working on this project?Off-campus travel is paid offStudents can leave class earlyThe location is convenientIt fulfills a graduation requirementQ4What is the professor considering doing to get move volunteers?Offering extra class creditPaying the students for their timeAsking for student volunteers from outside her classProviding flexible work schedulesQ5What information does the student still need to get from the professor? The name of the senior researcherWhat book he needs to read before the next lectureWhen the train session will be scheduledWhere the project is locatedTPO3 Lecture 3Q6What does the professor mainly discuss?The oldest known cave artHow ancient cave art is datedThe homes of Paleolithic humansHow Paleolithic humans thought about animalsQ7When does the professor mention his daughter?To describe her reaction to seeing the paintingsTo explain the universal appeal for the Chauvet paintingsTo demonstrate the size of most Paleolithic cave artTo emphasize his point about the age of Chauvet paintingsQ8What is the professor’s opinion about the art at the Chauvet cave?It is extremely well doneIt probably reflected artists’ religious beliefsIt is less sophisticated than the art at Lascaux and AltamiraIt is probably not much older than the are at Lascaux and AltamiraQ9According to the professor, what is the significance of charcoal marks on the walls of the Chauvet cave?They suggest that Paleolithic people cooked their food in the caveThey prove that people came to the cave long after the paintings were madeThey show how much light the Paleolithic artists needed for their workThey were used in recent times to date the paintingsQ10Compared to other Paleolithic art, what is unusual about the animals painted at Chauvet?Most of them are horsesMany of them are dangerousMany of them are shown alongside humansAll of them are species that are still found in FranceQ11What are two questions about the Chauvet cave artists that the professor raises but cannot answer?Choice two answers belowHow they lighted their work areaHow they obtained pigments for their paintsWhy they chose to paint certain animals and not othersWhy they placed their art in dark, uninhabited placesTPO3 Lecture 4Q12What is the lecture mainly about?Different ways of magnifying the spectrum of a starHow a chemical element was first discovered on the SunHow astronomers identify the chemical elements in a starWhy the spectra of different stars are composed of different colors。

Section 2TPO14-L4 Conversation 2NarratorListen to a conversion between a student and his faculty advisorAdvisorHi, Steve! I scheduled this appointment 'cuz it's been a while since we touched base.StudentI know. I've been really busy. A friend of mine works on the school paper. He asked me if I'd like to try reporting. So I did and I really love it.AdvisorHey, that sounds great.StudentYeah. The first article I wrote, it was a profile of the chemistry professor, the one who is named Teacher of the Year. My article ran on the front page. When I saw my name, I mean my byline in print, I was hooked. Now I know this is what I wanna do - be a reporter.AdvisorIsn't it great to discover something that you really enjoy? And I read that article too. It was very good.StudentTo be honest, the article got lots of editing. In fact, I barely recognized a couple of paragraphs. But the editor explained why the changes were made. I learned a lot, and my second article didn't need nearly as many changes.AdvisorSounds like you've got a real knack for this.StudentYeah. Anyway, I'm glad you scheduled this meeting 'cuz I wanna change my major to journalism now.AdvisorUm...the university doesn't offer a major in journalism.StudentOh no!AdvisorBut...StudentI... I mean, should I transfer to another school or major in English?AdvisorWell, wait a minute. Let me explain why the major isn't offered. Editors at newspapers, editors (sigh), I mean when you apply for a reporting job, editors look at two things. They want to see clips, you know, some of your published articles. They'll also want you to try out. They'll give you an assignment like covering a press conference or some other event, then see if you can craft a story about it accurately on deadline.StudentSo they don't even look at my major?AdvisorWell, it's not that they don't look at it, It's...well...having a degree in something other than journalism should actually work to your advantage.StudentHow?AdvisorMost journalists specialize these days; they only write about science or business or technology, for example. Is there a type of reporting you think you might like to specialize in?StudentWell, I think it'd be really cool to cover the Supreme Court. I mean their decisions affect so many people.AdvisorThat's really a goal worth striving for. So why not continue majoring in political science? And as electives, you could take some prelaw classes like Constitutional Law. And as for your work on the student newspaper, maybe they'd let you cover some local court cases, ones that students and professors here would want to read about.StudentDo you know of any?AdvisorWell I do, actually. There's a case involving this computer software program that one of our professors wrote. The District Court's deciding if the university's entitled to any of the professor's profits.StudentWow! I will definitely follow up on that.。

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官方真题Official35托福听力Lecture 4对话原文免费分享(原TPO)官方真题Official 35-L4Narrator:Listen to part of a lecture in an Earth science class.Professor:Let's review something from last week. We talked about an event that happened 65 million years ago. Anyone?Student:An asteroid hit Earth. Um...well, we think an asteroid hit Earth, near the Yucatan Peninsula, in Mexico, and that wiped out all the dinosaurs.Professor:Right. I wouldn't say that we've got 100% proof, but there's very strong evidence that this is why that mass extinction occurred.Okay. But did you know there was an earlier extinction far greater than the one that killed off the dinosaurs? It was what we call the Permian Extinction.Now, way back about 290 million years ago, at the beginning of the Permian Period, there was just one big continent, a super continent. And as the climate warmed up, plant and animal species began to diversify profusely. So life during the PermianPeriod was abundant and diverse. But about 250 million years ago, the Permian Period ended with a rapid mass extinction, something happened that wiped out 75% of the land animals and over 95% of ocean life.So what was it? What could have caused this?Well, with the all the evidence that it was an asteroid that led to the dinosaur extinction, we began asking ourselves: is it possible that another asteroid much earlier caused the Permian Extinction? And so researchers have been looking for an impact crater.Well, with the all the evidence that it was an asteroid that led to the dinosaur extinction, we began asking ourselves: is it possible that another asteroid much earlier caused the Permian Extinction? And so researchers have been looking for an impact crater.Student:I thought the Permian Extinction was caused by a decline in sea water oxygen levels. Isn't that what's in the textbook?Professor:But don't forget the textbook makes it very clear that's only a theory.Student:And it mentions something about volcanic eruptions too.Professor:It does, but now this new theory has led to a search for evidence of an asteroid impact. And one place of interest is a region called Wilkes Land in eastern Antarctica.A few years ago, a researcher reported a strange anomaly beneath the ice in Wilkes Land. Evidence of what may be a mascon. That's just short for mass concentration.When an asteroid hits Earth, when it slams into Earth's crust, we think that causes molten rock from deep below the surface to rise up into the impact area. Sort of like if you bump your head, you get a big lump under the skin. Fluid makes the area swell. Anyway, the material flowing up from below the crust is more dense than the crust itself. So that's how we get a mascon, a spot in the crust with newer crust material that's more dense than the material all around it.There're lots of mascons on the moon too, where a mascon’s density causes a small increase in the local gravity that can be measured and mapped by orbiting spacecraft. And where do these mascons tend to be found? In the centers of impact craters on the moon's surface.But back to Wilkes Land. We’re not certain that the mascon there...what might be a mascon ...was actually caused by the impact of an asteroid, but there does seem to be evidence. Researchers notice a gravity anomaly similar to those on the moon. And the spot where the gravity readings are especially high...this is right in the middle of a 500-kilometer wide, circular ridge, what could be part of an old impact crater.And if there was an asteroid impact there in Wilkes Land, the next question is: did it happen 250 million years ago? Because that would put it when in geologic history?Student:At the end of the Permian Period? Right when those animals went extinct.Professor: Exactly.Student:But can't researchers figure that out by studying the rocks there in Wilkes Land...where this impact supposedly took place?Professor:Well, to get to anything from that long ago, we would have to drill down to about a mile, about 1.6 kilometers of solid ice that covers the area today. And that's not likely to happen.But speaking of rocks, I should mention that Wilkes Land is not the only place of interest here. There's another called the Bedout High off the coast of Australia. And we have rock samples from the Bedout High. Some apparently have extraterrestrial origin. I mean, they show the effects of extreme temperatures and pressures, the level of extremes produced only by an impact. And as for their age, well, they do in fact, date back to about 250 million years ago.怎样用单词推断托福听力对话场景方法可行的原因仍在于ETS的出题原则，大家肯定已经非常熟悉托福听力考试中的"学生生活原则"，它是ETS坚定不移的出题原则，这一原则使托福听力从内容上永远离不了学生生活这一中心。

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TPO14Lecture1PsychologyProfessor：We’ve said that the term“Cognition”refers to mental states like:knowing and believing,and to mental processes that we use to arrive at those states.So for example, reasoning is a cognitive process,so it’s perception.We use information that we perceive through our senses to help us make decisions to arrive at beliefs and so on.And then there are memory and imagination which relate to the knowledge of things that happen in the past and may happen in the future.So perceiving,remembering,imagining are all internal mental processes that lead to knowing or believing.Yet,each of these processes has limitations, and can lead us to hold mistaken believes or make false predictions.T ake memory for example, maybe you have heard of studies in which people hear a list of related words.Ah…,let`s say a list of different kinds of fruit.After hearing this list,they are presented with several additional words.In this case,we`ll say the additional words were“blanket”and“cheery”.Neither of these words was on the original list,and,well,people will claim correctly that“blanket”was not on the original list,they’ll also claim incorrectly that the word“cheery”was on the list.Most people are convinced they heard the word “cheery”on the original list.Why do they make such a simple mistake?Well,we thinkbecause the words on the list were so closely related,the brain stored only the gist of what they heard.For example,that all the items on the list were types of the fruit.When we tap our memory,our brains often fill in details and quite of ten these details are actually false. We also see this“fill-in”phenomenon with perception.Perception is the faculty that allows us to process information in the present as we take it via our senses.Again,studies have shown that people will fill in information that they thought they perceived even when they didn`t.For example,experiments have been done where a person hears a sentence,but itis missing the word,that logically completes it.They’ll claim to hear that word even though it was never said.So if I were to say…er…the sunrise is in the…and then fill to complete the sentence,people will often claim to have heard the word“east”.In cognitive psychology,we have a phrase for this kind of inaccurate“filling in of details”---it’s called:A Blind Spot.The term originally refers to the place in our eyes where the optic nerve connects the back of the eye to the brain.There are no photo receptors in the area where the nerve connects to the eye.So that particular area of the eye is incapable of detecting images.It p roduces“A Blind Spot”in our field vision.We are unaware of it, because the brain fills in what it thinks belongs in its image,so the picture always appears complete to us.But the term“blind spot”has also taken on a more general meaning---it refers to people being unaware of a bias that may affect their judgment about the subject. And the same“blind-spot phenomenon”that affects memory and perception also affects imagination.Imagination is a faculty that some people use to anticipate future events in their lives.But the ease with which weimagine details can lead to unrealistic expectations and can bias our decisions.So…er…Peter,suppose I ask you to image a lunch salad,no problem,right?But I bet you imagine specific ingredients.Did yours have tomatoes,Onion,Lettuce?mine did?Our brains fill in all sorts of details that might not be part of other people’s image of a salad,which could lead to disappointment for us.If the next time we order a salad in a restaurant,we have our imagined salad in mind,that’s not necessarily what we’ll get on our plate.The problem is not that we imagine things,but that we assume what we’ve imagined is accurate.We should be aware that our imagination has this built-in feature, the blind spot,which makes our predictions fall short of reality.《心理学》教授：我们已经说过，“认知力”指的是这样的精神状态：熟悉某事并相信它确实存在，精神层面上我们曾经达到这样的状态。