Lecture 1
托福听力tpo40 lecture1、2、3、4 原文+题目+答案+译文
托福听力tpo40lecture1、2、3、4原文+题目+答案+译文Lecture1 (2)原文 (2)题目 (4)答案 (5)译文 (6)Lecture2 (7)原文 (7)题目 (9)答案 (11)译文 (11)Lecture3 (13)原文 (13)题目 (16)答案 (18)译文 (18)Lecture4 (20)原文 (20)题目 (22)答案 (24)译文 (24)Lecture1原文NARRATOR:Listen to part of a lecture in an art history class.MALE PROFESSOR:Last class I passed out your assignment for your first paper,and today I want to spend some time going over it.Mm…most people never take any art history until they get to college,so many of you have probably never written an art history paper before.I gave you a list of appropriate works of art for you to write about.So your next step in this process needs to be to go look at the work you've selected as your topic.And bring a pencil and a notepad with you,because I don't mean you should just drop by at the museum and glance at it so you can say you've seen it in real life.You need to go and sit in front of the work and really look at it—carefully and slowly.And keep careful notes about what you see—you’ll need them for the kind of art history paper you're going to be writing…it's what we call a formal analysis.A formal analysis of a work of art,any kind of art,is based on its formal qualities, which means qualities related to the form—things like color…texture…line…shapes…proportion…and composition.Probably the closest thing to a formal analysis you might have written is for an English class.If you've…say…written an analysis of a poem,you've used the same skills—you've given an analysis of the poem by describing and analyzing its form and meter.A formal analysis paper in art history is very similar.Now,before you begin writing your formal analysis,you'll want to start with a summary of the overall appearance of the work—a brief description of what you see. Are there figures—people?What are they doing?Or is it a landscape…or an abstract representation of something?Tell what the subject is,and what aspects are emphasized in the painting.This will give your reader an overview of what the work looks like before you analyze it.The next part of your paper—the actual formal analysis—will be the longest and most important section of your paper,where you describe and analyze individual design elements.For this portion of the paper,you're going to rely on the notes you took at the museum,because you should be able to describe in detail the design elements the artist uses,and how they are used.For example,does the artist use harsh lines or soft lines—are the colors bright or muted?Focus on the design elements that you feel are most strongly represented in that particular work of art. And if you don't know where to begin,take note of where your eye goes first.Then describe things in the order in which your eye moves around the work.This will help you understand how one part relates to another—the interaction between the different parts of the work.OK,this kind of analysis should occur throughout the main portion of the paper.In the last section of your paper—and this goes beyond formal analysis—you comment on the significance of what you have seen.What details of the work convey meaning?Some significant details will not be apparent to you right away,but if you look long enough,you realize how important they are for your interpretation of the work.Many years ago,I was writing a formal analysis of a painting of a little boy.In the painting,a little boy was standing in his nursery,and he was holding a toy bird in his hand,and there were more toys around him in the background of the painting. Because of the bird he was holding,I assumed at first that the painting was about the innocence of children.But as I looked at the painting longer,I realized that the boy's eyes looked sad even though there was no discernable expression on his face.And then it dawned on me that,even though he was surrounded by toys,he was all alone in his nursery.The boy's eyes were a significant detail in the painting,that I didn't notice at first.题目1.What point does the professor make about the writing of a formal analysis in art history?A.Its objective is to identify common features of several works of art.B.Its most important part is the explanation of an artwork's significance.C.Several styles of writing a formal analysis are used by art historians.D.A particular approach is required to present Information about an artwork.2.According to the professor,what will students need to do before writing the art history paper?A.Look at examples of formal analysis in textbooksB.Take notes on the artwork they will write aboutC.Go to different museums before selecting a topic for the paperD.Study the historical context of the artwork they will write about3.Why does the professor mention an English class?A.To explain the difference between visual language and written languageB.To explain that students need good writing skills for their assignmentC.To point out similarities between a poetry paper and the students'assignmentD.To point out that many art historians become writers4.What does the professor recommend as a way to understand the relationship between different parts of an artwork?A.Looking for lines that connect different parts of the workB.Examining the artwork from several different anglesC.Looking for similar colors the artist used throughout the workD.Determining how the viewer's eyes move around the work5.Why does the professor talk about his own experience analyzing the painting of a little boy?A.To point out a common misconception about formal analysisB.To stress the importance of looking at an artwork thoroughlyC.To show why a formal analysis should not emphasize small detailsD.To provide an example of an artwork that is easy to analyze6.The professor describes three sections the art history paper should contain.Place them in the order in which they should appear in the paper.Click on a phrase.Then drag it to the space where it belongs.A.Analysis of the design elements the artist usesB.Discussion of the meaning of the artworkC.Summary of the appearance of the artwork答案D B C D B CAB译文旁白：下面听一段艺术史课程的片段。
结构方程模型lecture129页PPT
模型识别
SEM的产生与发展（续1）
Jöreskog（1966,1967）开发了验证性因子 分析（CFA）
Jöreskog提出卡方检验，用来比较可测变量的观测相 关结构与假定模型所隐含的相关结构，从而否定（或 暂时验证）假设模型，是SEM发展的里程碑
可测变量
潜变量与 可测变量
潜变量与 可测变量
基本假定 变量没有测量误差
潜变量无关
可测变量可以有测量误差 潜变量可以相关
SEM的产生与发展（续4）
1970年代，LISREL的诞生极大地促进了SEM 的研究与应用
1994年，创立了专门的杂志Structural Equation Modeling
SEM的产生与发展（续2）
将Wright的路径分析与Jöreskog的CFA融合 在一起，从而诞生了SEM
SEM 研究可测变量与潜变量之间的关系
以及潜变量之间的关系
路径分析 研究可测变量之间的关系
CAF 研究可测变量与潜变量之间的关系
SEM的产生与发展（续3）
路径分析 CFA SEM
所涉变量
use of confirmatory factor analysis to reduce measurement error by having multiple indicators per latent variable
the attraction of SEM's graphical modeling interface the desirability of testing models overall rather than coefficients
20世纪末，计算科学家和科学哲学家进一步发展 了线性因果关系理论与算法，使得SEM在线性因 果关系建模中的应用在理论、统计以及计算方面 都得以深化和推广
托福听力tpo39 lecture1、2、3、4 原文+题目+答案+译文
托福听力tpo39lecture1、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 (23)译文 (24)Lecture1原文NARRATOR:Listen to part of a lecture in a geology class.MALE PROFESSOR:Since Earth formed,some four and a half billion years ago,the number of minerals here has increased dramatically,from a few dozen relatively simple minerals early on…to over4,300kinds of minerals we can identify today—many of them wonderfully complex.A basic question of geology is how all these new minerals came into being.Well,recent studies have turned to biology to try to explain how this happens.Now,much of biology is studied through the lens of evolution.And the theory of evolution suggests that,as environments change—and inevitably they do—some organisms will have characteristics that allow them to adapt to those changes successfully…characteristics that help these organisms develop and survive and reproduce.And when environments become more complex—as tends to happen over time—those earlier adaptations,those variations…become the basis of yet other combinations and variations…and lead to ever more diverse and complex forms of life.So from fewer,simpler,and relatively similar forms of life billions of years ago,life on Earth has now become a dazzling array of diversity and complexity.Well,some geologists now want to apply this concept to explain mineral diversity too. The conditions that minerals are under are not constant.Conditions like temperature or pressure or chemical surroundings—these change—often in cycles,increasing and decreasing slowly over time.And as conditions change,minerals sometimes break down and their atoms recombine into totally new compounds,as part of a process some call mineral evolution.Now,minerals are not alive,of course,so this is not evolution in quite the same sense you'd have in living organisms.But there do appear to be some parallels.Living organisms not only adapt to their environment but also affect it—change theenvironment within which other organisms may then develop.Likewise,each new mineral also enriches the chemical environment from which lots of other,even more complex new minerals may be formed in the future.Beyond these similarities,though,what's really fascinating about mineral evolution is the way minerals apparently coevolve with living organisms.Uh,what do I mean by that?Well,it's maybe a billion years after Earth’s formation that we first see evidence of life.Of course,early life-forms were primitive—just tiny,single-celled microbes—but over time,they had a profound effect.Huge numbers of these microbes began producing food by photosynthesis,which,of course,also freed up enormous amounts of oxygen.And lots of that oxygen interacted with the atoms of existing minerals,creating rust out of iron,for instance,…reacting with a whole range of different metals to create lots of new minerals.Now,living organisms rely on minerals.But they not only take in some minerals as nutrients,they also excrete others as waste products...including what we call biominerals—minerals that form with the help of biological life.We can see geologic evidence of biomineral production in what are called stromatolites.Stromatolites look like wavy layers of sedimentary rock.But they're really fossils—fossils of the waste from microbial mats.Microbial mats are vast colonies of one-celled organisms…that were once the most prevalent form of life on Earth.And the study of stromatolites indicates that these ancient microbial mats interacted with minerals in the environment and left behind new compounds as waste products—biominerals like carbonates,phosphates,and silica.In fact,we’ve grown microbial mats in the laboratory,and,over time,they too have produced some of the same sorts of minerals found in stromatolites.Uh,you don't need to know the details of the process right now—we’re still figuring out just how it works,ourselves.But you might be interested to know that this concept of mineral evolution is being used in the search for evidence of life on other planets.The thinking is that if certainminerals occur here on Earth as a result of a biological process,and if we also find those same minerals on another planet,…this would suggest that life may have once existed there.But—just because a particular mineral is found on say,Mars or Venus—uh,we really shouldn't assume that whatever caused it to turn up there…must be the same process that formed that mineral here on Earth.题目1.What is the main purpose of the lecture?A.To explain how geologists identified the minerals present during Earth's formation.B.To explain why living organisms require certain minerals to survive.C.To explain the differences between simple and compound minerals.D.To explain a recent theory about mineral formation.2.What point does the professor make about the minerals present during Earth's formation?A.They were comparatively few of them.B.They were more complex than minerals formed on other planets.C.Most were not affected by temperature and pressure changes on early Earth.D.Some of them are no longer being formed naturally on Earth.3.What similarities does the professor point out between minerals and living organisms?[Click on2answers.]A.Both first appeared on Earth at approximately the same time.B.They both can be formed only in the presence of oxygen.C.They both have become more diverse and complex over time.D.Not only are they both shaped by their environment,but both also affect it.4.What are stromatolites?A.Fossils remains of microbial mats.yered deposits of iron-based minerals.yers of rock that indicate changes in Earth's pressure and temperature.D.Rock formations created when oxygen interacts with certain metals.5.Why does the professor talk about microbial mats?A.To explain why organisms tend to colonize near certain minerals.B.To describe how minerals can be created by living organisms.C.To illustrate the effects of geological processes on living organisms.D.To emphasize that evolving life depended on the presence of oxygen.6.What does the professor think about using evidence of minerals on another planet to determine whether life has existed there?A.He believes it is the most promising way to search for life on another planet.B.He doubts that complex minerals will ever be found on another planet.C.He is cautious about assuming that certain minerals indicate the presence of life.D.He is surprised that the technique was not suggested until recently.答案D A CD A B C译文旁白：请听一段地质学讲座的节选片段。
托福听力tpo68 lecture1、2、3 原文+题目+答案+译文
托福听力tpo68 lecture1、2、3 原文+题目+答案+译文Lecture1 (2)原文 (2)题目 (4)答案 (6)译文 (6)Lecture2 (7)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)Lecture1原文Professor: OK, let’s look at two specific ancient cultures of the arctic, both of which lived on the far northern edge of the continent, the Dorset and the Thule. The Dorset culture began around eight hundred BC and ranged to cross most of arctic Canada. The Thule, well, they lived in the same area, but about twelve hundred years later. Both groups left some beautiful art behind, really are best evidence that these folks even existed. And although these two cultures lived in the same region, each group approached their art in very different ways.Alright, so the Dorset culture. Archaeologists have unearthed hundreds of Dorset sculptures mostly carve from ivory or bone and sometimes stone. They were mostly small sculptures of animal or human figures. And our best guess is that they were probably used mainly for religious purposes. The main subject of Dorset animal sculptures is the polar bear. Some of these polar bears are represented in naturalistic or realistic ways, but usually, their abstracted or stylized that is to say less realistic. Here is a typical polar bear sculpture. It's carved from ivory, we call these artifacts flying or floating polar bears, because, because they look like the polar bears doing just that flying or floating. Notice the distinctive markings, they seem to mark out the skeleton or joints of the bear.While polar bears were favorite subject, the Dorset created sculptures of other animals too, like seals and caribou which were represented in a more realistic fashion. We speculate that if the Dorset feared or respected a particular animal, they were more likely to present it in a stylized way, like with the polar bear, which, of course, is a large dangerous predator, maybe, it was a way of dealing with their fear. We also have Dorset’s sculptures whose meaning is more allusive. I'm talking about horns with many human faces carved into them. What's remarkable about these sculptures is the variety of facial types in expressions that appear on the single horn. If only the people represented on these artifacts could answer our questions, it tells us whetherthey are ancestors or residents of villager or what.Okay, let's switch to Thule art, which differs from Dorset art in, in some important ways. Interestingly, Thule artwork wasn't generally influenced by the earlier Dorset culture. It seems it would’ve grown out of a separate tradition that originated in Alaska. Thule artwork was most likely used to decorate common objects such as tools with attractive designs, we can't be entirely sure about this. However, we've tried to interpret the symbolic designs into the art. But of course, it's impossible to confirm the accuracy of such interpretations. What we do know is that the Thule people made extensive use of engravings, they drove the small holes and carve lines into various materials. These engravings, engraved patterns, rather, are found on the diverse group of artifacts, things ranging from weapons to jewelry to cones and boxes. Here's some examples. It's hard to see, but most of these objects do have engravings on them. Thule art was more of a graphic art. Uh, more like drawing. Many of their designs are geometric and abstract. Others containing engravings of human and animal figures.For instance, the long skinny object, among left, has a face at the top. We’ve also found the tool handle with hunting and camp scenes carved into it. As far as Thule’s sculpture goes, there is only a few small objects in wooden dowels like the one in the bottom right-hand corner. These have either no facial features or very rudimentary ones, less detailed, less individualized than the faces of Dorset’s sculpture.One scholar has argued that this difference resulted from the nature of Thule’s society which was built around group hunting expeditions on the ocean. This hunting approach required a great deal of cooperation which may have led to a kind of an overall uniformity in their art. And emphasis on commonality rather than individuality, which probably explains why there’re human figures like the faces or had standardized faces that all look similar. The most famous of the few Thule sculptures are the ones of birds in creatures that are part bird and part woman. While the sculpture is probably had some symbolic purpose, patterns of holes were drilled into them too. So, in general compared with artwork of the Dorset, Thule artprobably had a more decorative or utilitarian function.题目1.What is the main purpose of the lecture?A. To examine the extent to which Thule and Dorset art influenced the artwork of other arctic culturesB. To examine how Thule and Dorset designs changed over timeC. To compare and contrast artwork from two ancient arctic culturesD. To discuss how the natural world is shown in the artwork of two ancient arctic cultures2.What does the professor imply about “flying”or “floating”polar-bear sculptures?[Click on 2 answers.]A. They may have helped the Dorset people cope with their fear of a dangerous animal.B. Art historians consider them to be of little religious importance to the Dorset people.C. The Dorset people created them to demonstrate respect for polar bears.D. They were designed to take advantage of the natural shape of the ivory.3.According to the professor, what can be inferred about Dorset society based on its artwork?A. It placed more emphasis on religious beliefs than Thule society did.B. It relied on hunting large animals to a greater extent than Thule society did.C. It placed an emphasis on the production of jewelry.D. It was structured to support long ocean expeditions.4.According to the professor, what appears to be the main reason that the Thule engraved holes and lines into their artifacts?A. To honor their Alaskan ancestorsB. To illustrate the layout of their campgroundsC. To add realism to their sculpturesD. To add decoration to their sculptures5.Why does the professor mention Thule group-hunting expeditions?A. To explain why the Thule had plenty of time to produce detailed artworkB. To draw a connection between cooperation in finding food and uniformity in artC. To compare Thule hunting practices with Dorset hunting practicesD. To suggest that the majority of Thule sculptures were probably lost at sea6.Why does the professor saythis:If only the people represented on these artifacts could answer our questionsA. To suggest that the students interview descendants of Dorset peopleB. To propose a topic that the students could write aboutC. To ask students who they think the faces representD. To indicate that there is still a lot of missing information答案C AC AD B D译文教授:好的，让我们来看一下北极的两种特定的古代文化，它们都生活在大陆的最北端，Dorset文化和Thule文化。
托福听力tpo63 lecture1、2、3 原文+题目+答案+译文
托福听力tpo63lecture1、2、3原文+题目+答案+译文Lecture1 (1)原文 (1)题目 (3)答案 (5)译文 (5)Lecture2 (7)原文 (7)题目 (9)答案 (11)译文 (11)Lecture3 (13)原文 (13)题目 (15)答案 (17)译文 (17)Lecture1原文Listen to part of a lecture in a geology class.Professor:OK.Before we begin,I wanna remind you that our field trip to Bryce canyon national park is this weekend.Remember the bus leaves early,five am,so don't forget to set your alarm clocks.I think you're all gonna enjoy getting out of the classroom and actually seeing some remarkable geologic phenomena.Now,while we're there,I want you to pay particular attention to two things.One obviously will be the sediment layers making up the rocks,since we've spent so much time onsedimentary rocks.Bryce canyon is a great place to see how millions of years have turned layers and layers of tightly packed sediment,mud particles,sand remains of plants and animals into rock.But you're also gonna see some fascinating rock shapes, formations that are the result of the weathering and the erosion processes that occur at Bryce canyon.There are two main processes that are important.The first one is a weathering process called frost wedge.Frost wedge a process that widens cracks in rocks in the wintertime.It begins with warm air or daytime sun melting the snow.As the snow turns into water,it seeps into the cracks that occur naturally in sedimentary rocks.At night,this water freezes in the cracks,but when water freezes,it expands quite a bit, which means that it prize cracks open,gradually,making them wider and breaking off a little bits in the process.Now,this thought freeze cycle can happen as many as two hundred times in a single year.So that makes it the most important weathering process at Bryce canyon.The other key processes is runoff,which is an erosion process.Runoff takes place in the summer.The parks in the desert said the grounds very dry.When it rains in late summer,the ground is too hard to absorb the water,so it runs off.And as it runs off, it carries away the gravel,the broken bits of rock created by cross wedge in the winter.So runoff is the main erosion process that alters the rock landscape in the park.And because these processes have occurred over thousands of years,some of the results can be pretty dramatic,like the giant corridors are passage ways that have developed within the rocks.These passage ways are known as slot canyons.Here's an example of one,not from the part we're going to.This one is actually in Australia,but the scale is typical.So these huge spaces started out as small cracks throughout the sedimentary rock,then thanks to millions of cycles across wedge and runoff.What used to be one big area of rock is now sort of two smaller areas of brought with the corridor in between.We'll have a chance to walk through some like this.These slot canyons are great places to explore,but let me just say,for any of you who aren't from around here,if you ever go on your own,make sure you check aweather forecast first.A sudden heavy rain can cause a flash flood in a slot canyon. So you want to know when it's safe to explore them.Unfortunately,it'll be dry this weekend.Now,these deep,narrow slots are pretty common.You might even have two of them very close to each other with only a thin wall of rock in between.Of course,frost wedge is still at work,so it starts wearing away at the front of the thin wall until you get a whole I mean a hole all the way through the wall,front to back.And this hole gets bigger and bigger.Once it's at least one meter in diameter,it's called a window.And eventually the weight on top of it is just too much,so the roof caves in and only the sides,sometimes it's just one side is left standing.These sides,which look a lot like collins,now are called Hudos.Here's a photo of something we'll be seeing.One of the things that makes Bryce canyon unique is that it has more Hudos than anywhere else in the world.Yes,Margot?Female student:Why is it so lumpy looking?You'd think it would be smoother.Professor:Well,remember,these are sedimentary rocks,so they have layers.Some layers are mostly limestone,and limestone erodes pretty quickly in the presence of any kind of acid.Now Bryce canyon in a very unpolluted area,but even,there the rain water has a little carbolic acid in it,which causes the limestone to erode.But other layers are made up of different types of sediment,which aren't so vulnerable to acid,so they don't erode as quickly.题目1.What is the lecture mainly about?A.The length of time required to produce sedimentary rocksB.The role of climate conditions in the creation of sedimentary rocksC.Some processes that produced a specific group of rock formationsD.Some unique geologic features found in canyons in the United States2.According to the professor,what is one characteristic that frost wedging and runoff share?A.Neither occurs in a desert.B.Neither is a frequent event.C.Both are weathering processes.D.Both are seasonal phenomena.3.Why does the professor show a picture of a slot canyon?A.To give students a sense of the size of a typical slot canyonB.To show students one of the places they will visit on their field tripC.To illustrate how many sediment layers are visible in a typical slot canyonD.To show how much slot canyons can vary based on local climate conditions4.What is the professor's attitude toward students exploring Bryce Canyon on their own?A.He worries that students may not know to take appropriate precautions if they go by themselves.B.He suspects that many students will not go on their own if such a trip requires them to get up early.C.He hopes that the class field trip will motivate students to visit Bryce Canyon on their own.D.He believes that students learn more from individual exploration than they dofrom being in a group.5.How is a hoodoo formed?A.Runoff produces large gravel deposits.B.Air pollution leads to a buildup of limestone.C.The roof of a rock window collapses.D.A flash flood washes away the base of a rock wall.6.According to the professor,what two factors explain why a hoodoo does not have a smooth shape?[Click on2answers.]A.The presence of acid in rainwaterB.The temperature swings between the summer and the winter seasonsC.The composition of the hoodoo's sedimentary layersD.The location of the cracks created by frost wedging答案C D A A C AC译文听一段地质学的讲座。
托福听力tpo67 lecture1、2、3 原文+题目+答案+译文
托福听力tpo67lecture1、2、3原文+题目+答案+译文Lecture1 (2)原文 (2)题目 (4)答案 (6)译文 (6)Lecture2 (7)原文 (7)题目 (10)答案 (12)译文 (12)Lecture3 (13)原文 (14)题目 (16)答案 (18)译文 (18)Lecture1原文Professor:Now we've said that animal behavior patterns involve an interplay between an animal and its environment.In particular,behavior patterns can change as an animal becomes adapted to its environment.We can see the results of this in the way that animals have developed different types of feeding behavior.Animals are generally classified as a generalist feeders and specialist feeders.Now,um,these terms are used in a variety of ways.At times,they're used to refer to an animal's range of habitats.I've also seen them used to describe the number of foraging techniques that are used by an individual or species.Um,but for our purposes,we're going to use them to refer to the range of food items that are eaten by a species.So a generalist feeder is a species that eats a wide variety of foods during its lifetime.And a specialist is a species that feeds on a highly restricted number of foods.A good example of a generalist would be a rat.Rats are notorious for eating just about anything that's available,whether it's a plant or an animal.At the other end of the spectrum,we have the koala which eats only the leaves of eucalyptus trees.Okay,now there are advantages to each.For a generalist,If1type of food isn't around,it can feed on another that's more abundant.On the other hand,the advantage of being a specialist is that the animal is well adapted to its food.You could say that specialists are feeding masters,their consumption,even their digestive system is just so finely tuned.For instance,take the koala.The eucalyptus leaves that it feeds on,don't contain much protein.What's more,the leaves contain compounds that are poisonous to most species?But the koalas digestive system has adapted to handle this.It's liver deactivates,the poisonous compounds,and its digestive system is designed to extract the maximum amount of nutrients from the leaves.So it's not a question of which strategy is better.The real question is,what determines how selective animal species are in what they eat?Well,the answer maylie in a concept called optimal foraging.The idea is that natural selection favors animals whose feeding behavior has the lowest cost to benefit ratio.That is you want to get the best healthiest food you can.And you want to do it as quickly as possible. And as easily as possible.Now,in a natural environment,no animal forage in an absolutely optimal manner. But,well,I read some research on a little rat called the kangaroo rat,which lives in deserts in North America.The kangaroo rat is a generalist which eats plant matter like seeds and fruit.It lives in deep burrows which provide protection from the desert heat and from predators like hawks or snakes.And it goes foraging at night for food.For plant matter,under the protection of darkness,even though it's a generalist.If the only thing available is seed,if a choice of seeds is available to it,it picks up seeds that provide more energy than those it leaves behind.And it carries them back to its burrow.Once it's there,it might eat only the richest seeds from the ones that brought back.So it selects seeds outside in a way that lets it spend as little time as possible foraging in that risky environment,and then sorts out its food later when it's safely in its burrow.Oh,yes,Kenneth.You have a question?Male student:But what about the koala?It gets by uh,by being even more selective, you'd think you would be really risky to rely completely on eucalyptus leaves. Wouldn't it be better to diversify like the kangaroo rat,and eat,at least one or two other things?Professor:Well,what do you think the koala would say?What do I gain by being so selective?In terms of optimal foraging,it's clear that eucalyptus trees provide an abundant source of food.Other animals can't eat the leaves and think of how little energy the koala uses.It spends only about3hours each day eating to get the energy it needs.So being a specialist allows it to get the nutrients it needs with minimal expenditure of energy.题目1.What is the lecture mainly about?A.The reasons why some animals eat only plantsB.The advantages of two different feeding adaptationsC.The variety of foods that certain animals can eatD.The relationship between two animals that share a habitat2.What definition of the term“generalist”does the professor use in the lecture?A.An animal species that eats a wide variety of foodsB.An animal species that lives in a range of different habitatsC.An animal species that uses several techniques to forage for foodD.An animal species that forages at several different times of the day3.What points does the professor make about the koala’s specialist feeding habits? [Click on2answers.]A.It obtains all the food it needs in relatively little time.B.It requires large amounts of protein in its diet.C.It can eat leaves that are poisonous to other animals.D.It spends most of its time eating.4.What does the professor imply about the kangaroo rat?A.It will take more risks when foraging for high-energy food.B.It is one of the most selective feeders in North America.C.Its competitors often eat its food supply.D.It is selective when choosing what food it eats.5.How does the professor organize the information in the lecture?A.By contrasting an old theory with a new theoryB.By defining important terms and then giving examples of themC.By describing the similarities between two animalsD.By describing a problem and then suggesting some solutions6.Why does the professor say this:Male student:But what about the koala?It gets by uh,by being even more selective, you'd think you would be really risky to rely completely on eucalyptus leaves. Wouldn't it be better to diversify like the kangaroo rat,and eat,at least one or two other things?Professor:Well,what do you think the koala would say?What do I gain by being so selective?In terms of optimal foraging,it's clear that eucalyptus trees provide an abundant source of food.Other animals can't eat the leaves and think of how little energy the koala uses.A.To express agreement that the koala should eat a greater variety of foodB.To indicate that the koala’s behavior does not illustrate optimal foragingC.To remind the man of the characteristics of selective feedersD.To encourage the man to consider the koala’s feeding behavior differently答案B A ACD B D译文我们已经说过动物的行为模式涉及到动物和它的环境之间的相互作用。
lecture 1 课程介与课程基础绍
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5.需求分析
Object Oriented Requirement Analysis:
analysis = extracting the needs
– 方法：Use cases
The difficulties: – The problem domain -- complex reality – Communication -- with domain experts – Continual change -- user requirements
•软件过程 •CMMI
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课程组织
36课时： – 授课26H – 实验8H – 考试2H
成绩 – 平时考核：30% – 考试：70%
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参考教材与资料
邵维忠，面向对象的系统分析
面向对象的系统设计 朱三元，软件工程技术概论。 Anton Eliens, 面向对象软件开发原理,机械工业出 版社。2003 Ian Graham,Third Edition 面向对象方法--原理与实 践,机械工业出版社。2003 Grady Booch, 面向对象的分析与设计，机械工业 出版社。2003
4
Lecture 1. OO基础
部分概念与术语
对象与面向对象
结构化方法 VS OO 方法对比 面向对象的术语 面向对象的需求、分析、设计、实施
5
1.概念与术语（1/2）
Some terms known OOP: C++,Java，…. Object based: VB Object Inheritance Class Capsulation Overload Overriding Dynamic binding /Static binding
Lecture 1-2 词汇对比
do large harm to do great harm to
great population
a large population crowded traffic heavy traffic
keep one’s face save one’s face
留面子
三、 情感意义对比
教师休息室 teachers’ restroom
sea cucumber 海黄瓜
海参
不能望文生义，要勤查 字典，避免貌合神离
4. Mr. Smith is one of the most durable teachers at this university. 持久的 史密斯先生是该大学任教时间最长的教师之一. 5. He used to be very shy; but after entering college he’s started to blossom. 开花、绽放 他过去一直非常害羞，但是现在他开始活泼/开朗起来。
译文一：…… made our blood boil. 愤怒 译文二：Beijing's winning the bid for the 2008 Olympics ek 凉茶 红茶 cold tea red tea
yoghurt herbal tea black tea teachers’ lounge
3. 意见 (1) 我们应该认真倾听群众的意见。
看法
We should listen carefully to people’s opinions. (2) 两位领导人就双边关系及共同关心的问题交换了意见。 见解 (fml) The two leaders exchanged views on bilateral relations and issues of common concern.
澳大利亚公司法Lecture 1ppt翻译版
2
Sources of Company Law 公司法渊源
(1) General Law/case law (made up of both common law and equity) and 普通法/ 判例法(由普通法和衡平法组成)
(2) Statute Law: Corporations Act 2001 (Cth) 成文法:2001年公司法(Cth) • sets out key rules that govern or facilitate the formation, management, operation
and termination of companies 订定指引或协助公司成立、管理、营运及终止的 主要规则 • Passed by Federal Government in July 2001, but Act has been amended ever since; 2001年7月，联邦政府通过了该法案，但此后该法案一直被修订; • Continuous process of law reform (both statutory and through judicial development of case law) 持续的法律改革过程(包括成文法和判例法的司法发 展) • Content of company law never stands still! 公司法的内容永远不会一成不变! • Over 1,500 sections. • See: How to use the Corporations Act at Ch 1 of Australian Corporate Law (5th ed, 2016) 参见:如何使用澳大利亚公司法第1章(2016年第5版)
托福听力TPO22原文 Lecture1
托福听力TPO22原文Lecture1下面就让小编来为大家介绍一下托福听力TPO22原文中Lecture1的文本内容吧，大家要好好把握，这些都是非常有价值的材料，同时，大家也可以登录前程百利论坛进行TPO练习辅导，希望能够给准备托福听力的同学带来帮助。
TPO22Lecture1(Anthropology)Professor：One of the big questions when we look at prehistory is why did the earliest statesform?Well,to begin we’d better define exactly what we mean when we talk about states.The human groups that are the smallest and have the least social and political complexity,we call bands.The groups that are the largest and most socially and politically complex,we call states.So,the level of complexity here refers to the organization of people into large,diverse groups,and densely populated communities. And there are four levels in total:bands,tribes,chiefdoms and states.But,but back to my original question. Why did early states form?Why not just continue to live in small groups?Why become more complex? One theory called the environmental approach hypothesizes that the main force behind state formation was population growth.It assumes that centralized management was critical to dealing with issues caused by sudden population surges,like a strain on limited food supplies.At the least complex end of the spectrum, the few families living in bands are able to meet their own basic needs.They usually hunt together and forage whatever foods are available to them,instead of domesticating animals and planting crops.In order to efficiently take advantage of the wild foods available,bands are often nomadic and move around following herds of animals.This strategy is feasible when you have a small population.But when you have a large population,well,the whole population can’t just get up and move to follow a wild herd of animals.So you need sophisticated technologies to produce enough food for everyone.And there is an increase need to resolve social problems that arise as people begin to compete for resources.To manage intensified food production,to collect,store and distribute food,you need centralizeddecision-making,centralized decision-makers.It’s the same thing when it comes to maintaining social order.You need to create and efficiently enforce a formal legal code.It makes sense to have a centralized authority in charge of that,right?So a hierarchy forms.By definition,states had at least three social levels. Usually,an upper class of rulers,a middleclass comprised of managers and merchants,and a lower class of crop producers and agricultural laborers.The environmental approach hypothesizes that states appear in certain environmental settings,settings which have a severe population problem or a shortage of agricultural land.But not everyone agrees with the theory.It definitely has some weaknesses.For example,states have developed in places like the mild lowlands of Mesoamerica and in Egypt’s Nile River Valley. Both places had vast areas of fertile farmland,no shortage of agricultural land.And what about population increase?Well,there were some early states that formed where there wasn’t any sudden population increase.So it seems that these are valid criticisms of the environmental approach.教授：当我们审视史前历史的时候，最大的一个问题就是为何最早的城邦会形成。
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Lecture 1 Language Acquisition & Teaching Approaches Lecturer: Bin Yin Mother Tongue Learner Experiences Language Acquisition: A Progression Role of the Adult Caretaker Speech Language Acquisition: A Progression Language Acquisition: A Progression Language Acquisition: A Progression Caretaker Speech Frequent questions Exaggerated intonation Special forms - baby talk (tummy) Simple sounds for objects (choo choo, poo poo) Caretaker Speech Conversational structure adopted which assigns an interactive role to child before (s)he becomes a speaking participant. Simple sentence structures Lots of repetition Caretaker speech becomes more elaborate as child becomes more proficient. homework Views on language 1. Structural view 2. Functional view 3. Interactional view Homework Views on language learning and learning in general 1. Behaviourist theory 2. Cognitive theory 3. Constructivist theory 4. Socio-constructivist theory Homework Krashen‘s Input Hypothesis Model Krashen‘s Input Hypothesis Model Known by various names ◦ Monitor hypothesis ◦ Input model ◦ Comprehensible input model ◦ Natural model All these names refer to the one and the same model Five hypotheses Acquisition – learning distinction hypothesis Natural sequence/order hypothesis Monitor hypothesis Comprehensible input hypothesis Affective filter hypothesis Acquisition-Learning Distinction Hypothesis Acquisition Learning Subconscious – implicit learning A distinct process – can never become learning The way children learn the language Meaning focused Inductive Naturalistic settings Conscious – explicit learning A distinct process – can never become acquisition The way adults learn the language Grammar (form) focused Deductive Formal settings Language Acquisition The acquisition of language ‗is doubtless the greatest intellectual feat any one of us is ever required to perform‘ – Leonard Bloomfield, Language (1933) Universal Grammar- innateness hypothesis ? A child‘s brain contains special language-learning mechanisms at birth (Chomsky, 1957) – an inborn faculty for language acquisition – Language Acquisition Device (LAD) UG – blueprint (Chomsky, 1957) which aids the child in the task of constructing a grammar. LAD contained ‗specific knowledge about language‘ Russell (2001) – ‗mechanism for working out the rules of language‘ Criticisms It is possible they are two endpoints in a continuum (for Krashen, learning cannot become acquisition and vice versa) Confusion between learning settings and psychological processes Research shows that children are not the best language learners Current research opinion on acquisition – learning distinction Krashen may be correct – neurobiological findings in the last 3 or 4 years indicate that there are two kinds of knowledge – declarative (what) and procedural (how). Originally they were considered to be two sides of the same coin. They have been shown to be two entirely different processes It is possible that children acquire language procedurally from the start whereas adults learn declarative knowledge and then try to convert it into procedural knowledge. Implications of Acquisition-Learning Distinction Hypothesis Content based language teaching – total immersion is preferable. Provide meaningful contexts for understanding language Provide meaningful communication activities such as information gap activities. Natural (order) sequence hypothesis Children learn language in a predictable sequence. It is impossible to alter the course of development since language acquisition, be it L1 or L2 is a UG driven process. Grammar teaching is a waste of time. Criticisms on natural sequence hypothesis Natural sequence is a product of various factors such as ◦ Perceptual saliency (competition model) ◦ Input frequency (connectionist and social interactionist models) ◦ Syntactic complexity ◦ Cognitive transparency ◦ Artifact of methods and instruments used ◦ Native language influence Criticisms on natural sequence hypothesis The sequences are not identical though similar – the items that are learnt in L1 are also learnt earlier in L2 Total disregard for grammar had negative results in Canadian immersion programs. It has been shown that teaching can somewhat alter the sequence. Implications of natural order hypothesis Errors are developmental and are a natural byproduct of learning – tolerate them.( ambiguity) Allow learners to make errors and do not correct them Monitor hypothesis Three conditions: Knowledge of grammar Focus on grammar Availability of time Monitor hypothesis Grammar focused learning leads to grammar focused production Children do not monitor so why should adults? Criticisms on monitor hypothesis Children do monitor Children are not the best language learners. Total disregard for grammar had negative effects in the Canadian immersion programs. Implications of monitor hypothesis Model language and do not teach grammar explicitly. Comprehensible input hypothesis Vygotsky – Zone of proximal development (ZPD) i + 1 (expanded, it means, the level of interlanguage plus 1 level beyond) Comprehension is sufficient and there is no necessity for production Comprehensible input hypothesis - criticism Imprecise terminology – impossible to come up with operationalizable definitions, the level of the learner, 1 level, 2 levels, one level beyond – what are they?