1、Unit 6 Nurturing naturePeriod 1Starting out&Understanding ideas 语篇研读课 自主素养储备.新词相知(一)连线相匹配的英语释义。【答案】eafbgcdmassivedelicatesplendidleisureradiationmirror-likewandera.having a fine structure that is easily damaged or brokenb.the time when you are not working or are not busyc.like a mirrord.to go somewh
2、ere at a leisurely pacee.large,solid,and heavy f.seems to be impressive and beautifulg.energy emitted from a source in the form of rays or waves,e.g.heat,light,or sound(二)结合语境,从上面的表格中选择恰当的单词填空。1.It is said that mobile phone _may cause brain illness.2.Let us work together for a more _future.3.A _popu
3、lation still has health problems.4.He did nothing but _on the street.radiationsplendidmassivewander.短语熟记选择恰当的短语补全下列语境。at ones leisure,allow.to,in order to,located at,make sure,thanks to1.Please _me _express how much I appreciate your help.2._the bottom of the CD,the word“Microsoft”is printed.3._the
4、Internet,its easy to compare prices for everything.4.He always plays it _or before sleep every day.5._do his scientific experiment,Edison had to work at the age of his teens.6.We have to find more ways to _we have room to operate.allowtoLocated atThanks toat his leisureIn order tomake sure课文浅触1.阅读Th
5、e Sky Railway,思考你对这个标题的理解。2.Why is the Qinghai-Tibet Railway called the Sky Railway?_ Because it is a“impossible”railway in the world with the care theenvironment deserves and a record to overcome the most difficultengineering challenges.Step 1While reading.Find the answers to the questions in the f
6、orm.探究素养提能Why the railway is particularly special to the author?He was travelling along the railway that many foreign experts claimed was 1.“_”He was one of the people who 2._ on this railwayThe unforgettable experience of the building work of this railwayThe 3._ and the passages The building of the
7、 4._ railway stationThe 5._ for the plants and animalsimpossibleworkedbridgeshighestcare.Choose the best answer.1.Which is the first station of the Qinghai-Tibet Railway?A.Qinghai.B.Tibet.C.Xining.D.Lhasa.2.Which of the following is not mentioned in the passage?A.The efforts to overcome the most dif
8、ficult engineering challenges.B.How to protect the delicate ecosystem.C.The greatest challenges for railway workers.D.The cost of building the railway.答案:12.CD.Answer the following questions.1.What does the title“The Sky Railway”mean?_ 2.Why is the Qinghai-Tibet Railway“impossible”?_ It is a song wh
9、ich represents the Qinghai-Tibet Railway and the importance ofits building.Because it took years to overcome so many difficult engineering challenges andprotected the delicate ecosystem as well.Sentence explanation.Sitting back in my seat,I cant quite believe that Im about to travel along the railwa
10、y that many foreign experts claimed was“impossible”.分析:本句包含一个宾语从句和定语从句。Sitting back in my seat,I cant quite believe 非谓语动词that Im about to travel along the railway that宾语从句 定语从句many foreign experts claimed was“impossible”.插入语句意:坐在我的座位上,我还是不能相信我将沿着许多外国专家认为“不可能”的铁路旅行。Step 2Post-readingSuppose you are a
11、 traveler,try to tell the journey along the railway.Since our train left Xining,the song“Sky Railway”has been playing 1._.The first landmark to 2._is the splendid QingshuiheBridge,the worlds longest bridge 3._permafrost.I can see many wild animals such as the Tibetan antelopes moving in their 4._.Ta
12、nggula Station,the highest railway station in the world,is 5._over 5,000 metres 6._.Cuona Lake is so close to the railway that I inside my headcatch my eyebuilt overnatural habitatlocated atabove sea levelwant to reach out and touch its pale blue 7._ surface.Thanks to our country and the railway wor
13、kers,I can enjoy these 8._in the Qinghai-Tibet Plateau.mirror-likemagical landscapesPre-readingHeaven RoadEarly morning standing on the green ranchI caught sight of eagles in the sun glowFlying across the blue sky like an auspicious cloud And bringing auspiciousness to the Tibetan sons and daughters
14、Its really a magical heaven roadBy which the terrestrial warmth is sent to the frontierFrom now on the mountains seem not so high and the roads not so longChildren of all ethnic groups gather together happilyAt dusk standing on the high hillI sighted the railway built stretching to my hometownLike d
15、ragons climbing over mountains and mountainsIt brings peace and happiness to the snowy plateauIts really a magical heaven roadTaking us to the paradise on earthHighland barley wine and buttered tea will be more aromatic and sweeterSongs of happiness will spread all over the landHave you ever heard a
16、bout this song?.Answer the following questions.1.Q:How many parts does the passage contain?A:_2.Q:What is the topic of the passage?A:The _ Railwaythe _ Railway.Two.SkyQinghai-Tibet.Fill in the form below.The travel along the Sky RailwayThe train has been racing along steadily since it left 1._.The 2
17、._ Qingshuihe BridgeThe 3._ Tanggula StationThe Cuona Lake with a pale blue 4._ surfaceXiningsplendidhighestmirror-like【主题情境思考】Suppose you are an official of a wild animal natural reserve,what can you do to protect the natural habitat in the area?_As an official of a wild animal nature reserve,I sho
18、uld protect theenvironment as much as I can.I will advise every organization to avoid furtherdestruction of biodiversity and natural life.At the same time,I will seed moretrees to replant forests and barren mountains.阅读理解How does an ecosystem(生态系统)work?What makes the populations of different species
19、 the way they are?Why are there so many flies and so few wolves?To find an answer,scientists have built mathematical models of food webs,noting who eats whom and how much each one eats.课时素养达标With such models,scientists have found out some key principles operating in food webs.Most food webs,for inst
20、ance,consist of many weak links rather than a few strong ones.When a predator(掠食动物)always eats huge numbers of a single prey(猎物),the two species are strongly linked;when a predator lives on various species,they are weakly linked.Food webs may be dominated by many weak links because that arrangement
21、is more stable over the long term.If a predator can eat several species,it can survive the extinction(灭绝)of one of them.And if a predator can move on to another species that is easier to find when a prey species becomes rare,the switch allows the original prey to recover.The weak links may thus keep
22、 species from driving one another to extinction.Mathematical models have also revealed that food webs may be unstable,where small changes of top predators can lead to big effects throughout entire ecosystems.In the 1960s,scientists proposed that predators at the top of a food web had a surprising am
23、ount of control over the size of populations of other speciesincluding species they did not directly attack.And unplanned human activities have proved the idea of top-down control by top predators to be true.In the ocean,we fished for top predators such as cod on an industrial scale,while on land,we
24、 killed off large predators such as wolves.These actions have greatly affected the ecological balance.Scientists have built an early-warning system based on mathematical models.Ideally,the system would tell us when to adapt human activities that are pushing an ecosystem toward a breakdown or would e
25、ven allow us to pull an ecosystem back from the borderline.Prevention is key,scientists say,because once ecosystems pass their tipping point(临界点),it is remarkably difficult for them to return.1.What have scientists discovered with the help of mathematical models of food webs?A.The living habits of s
26、pecies in food webs.B.The rules governing food webs of the ecosystems.C.The approaches to studying the species in the ecosystems.D.The differences between weak and strong links in food webs.2.A strong link is found between two species when a predator_.A.has a wide food choiceB.can easily find new pr
27、eyC.sticks to one prey speciesD.can quickly move to another place3.What will happen if the populations of top predators in a food web greatly decline?A.The prey species they directly attack will die out.B.The species they indirectly attack will turn into top predators.C.The living environment of oth
28、er species will remain unchanged.D.The populations of other species will experience unexpected changes.4.What conclusion can be drawn from the examples in Paragraph 4?A.Uncontrolled human activities greatly upset ecosystems.B.Rapid economic development threatens animal habitats.C.Species of commerci
29、al value dominate other species.D.Industrial activities help keep food webs stable.1.【解析】选B。细节理解题。根据第二段的With such models,scientists have found out some key principles operating in food webs.可知,利用这种模型,科学家们已经发现了在食物网中的一些关键的规则。故选B。2.【解析】选C。细节理解题。根据第二段的When a predator always eats huge numbers of a single
30、 prey,the two species are strongly linked可知,如果一种掠食动物一直大量吃单一的动物种类,它们就是紧密相连的。故选C。3.【解析】选D。推理判断题。根据第三段的Mathematical models have also revealed that food webs may be unstable,where small changes of top predators can lead to big effects throughout entire ecosystems.可知,当顶层的掠食动物稍微有变化时,整个生态系统就会有很大的影响。由此可知,如果顶层掠食动物的数量大幅减少,其他物种的数量也会有出乎意料的变化。故选D。4.【解析】选A。推理判断题。第四段的例子旨在阐明,人类的计划外的活动会在很大程度上影响生态系统的平衡。故选A。本课结束
