新教材高中英语UNIT3CONSERVATIONPeriod2Lesson1课件

1、UNIT 3CONSERVATIONPeriod TwoLesson 1课前自主预习1_n物种，种2_adj.异常的；不平常的3_adj.大量的4_adj.各种各样的，形形色色的5_vi.& vt.减少；减少的量speciesunusualmassvarieddecrease重点单词6_vt.指责，责怪7_vt.影响8_adj.濒危的9_adj.太阳光(能)的10_vi.& vt.(使)孵化11_vt.(使)恢复blameaffectendangeredsolarhatchrestore1at the rate of _2be based on _3lay eggs _4be at high

2、risk _5wipe out _6die from _重点词块以的速度/比例基于产卵/下蛋高危；处境非常危险彻底毁灭死于7up to _8in short _9according to _10take steps _11be to blame _12 be at risk _高达简而言之根据采取措施；执行步骤把归咎于处境危险，受到威胁1(P52)In the last 500 million years, _ five times when life on Earth has almost ended.在过去的5亿年里，曾经有5次地球上的生命几乎灭绝了。【答案】there have been

3、重点句式2(P53)_ human activity has negatively affected all other species on Earth, including animals and plants. 很明显，人类活动对地球上所有其他物种，包括动物和植物都产生了负面影响。【答案】It is clear that3(P53)Without forest, we _ no air to breathe. 没有森林，我们就没有呼吸的空气。【答案】would have判断正误()1In the last fifty million years, life on earth has al

4、most died out.()2Human activities are to blame for the previous life extinction.课文预读()3Human activities have so far negatively affected life on the earth.()4Life will almost die out in the sixth mass extinction.()5Our world and our lives depend on the balance in nature between animals and plants.【答案

5、】15FFTTT阅读理解()1Why does the author mention the extinctions in history in the first paragraph?ATo show us the terrible disasters for mankind.BTo tell us the climates impact on wildlife.CTo introduce the topic of this text to the readers. DTo warn us of the potential disasters to mankind.()2What worri

6、es us most according to the author?AThe destruction of our habitats.BThe rapid progress of life extinction.CThe environmental pollution.DThe imbalance of nature.()3What can we infer from the third paragraph?AHuman beings are closely related to nature.BMost living things will die out in the future.CN

7、o forest will exist on the earth in the future.DOxygen will soon disappear on the earth. ()4What does the author intend to do in the last paragraph?ATo show us what to do to avoid the sixth distinction.BTo tell us what to do to conserve our environment.CTo encourage us to save more energy in our lif

8、e.DTo explain why to protect the natural environment.()5What is the authors attitude towards avoiding the sixth extinction?APessimistic.BUncertain.CAmbiguous. DOptimistic. 【答案】15CBAAD课堂新知讲练1wipe out 彻底毁灭(P52) Extinctions, where entire species are wiped out, are not unusual in our Earths history. 【翻译

9、】物种灭绝，即整个物种的完全消失，在地球历史上并不罕见。词汇拓讲【语言提升】wipe out是个多义词语，可以表示：(1)彻底消灭，全部摧毁(具体的物品)The disease threatens to wipe out the entire population.这种疾病有可能毁灭整个种群。The whole village was wiped out during the earthquake.在地震中，整个村子都被毁掉了。(2)去除，擦掉(抽象的东西)I really hope surgery could wipe out the tired feelings. 我真的希望手术可以去除这

10、些疲劳的感觉。The incident wiped out my hope completely.那件事情把我所有的希望都破灭了。 wipe sth. down (用湿布)彻底揩擦干净She took a cloth and wiped down the kitchen table.她拿了一块布把厨房桌面擦得干干净净。wipe sth. off/from sth. 从除掉(或抹掉)Please wipe the dust off the chair. 请把灰尘从椅子上擦掉。wipe sth. on/with sth. 擦拭；抹；揩；蹭Please wipe your feet on the m

11、at.请在垫子上蹭一蹭脚。wipe sth. awaywipe sth. out把某物清除掉Wipe away the tears on your face, but you cant take the pain away.擦去脸上的泪水，却带不走心中的痛楚。【针对练习】完成句子(1)A volcanic eruption nearly _ of Montserrat in 19971997年的一次火山喷发差点把孟塞拉特这个小岛给毁灭了。(2)A disease has _.一场疾病把他所有的记忆都抹去了。(3)A big fire _ .一场大火把那座小木屋烧毁了。单句语法填空 (4)Loc

12、usts are pests but they arent easily wiped _ by their enemies.(5)After a serious flu outbreak wipes _ 994% of the worlds population, a battle unfolds between good and evil among those left.(6)While they cant wipe _ the strain of the past, they can certainly move forward.(7)Haze Mabry, who has worked

13、 as a school keeper for thirteen years, walks into the school building every day and empties garbage cans, wipes _ bathrooms and mops wet messes in the hallways.(8)Then I wiped the dust _ all the furniture and mopped the floors.【答案】(1)wiped out the small island(2)wiped out all his memories(3)wiped o

14、ut the small wooden house(4)out(5)out(6)away(7)down(8)off2unusual adj.异常的；不平常的(P52) Extinctions, where entire species are wiped out, are not unusual in our Earths history. 【翻译】物种灭绝，即整个物种的完全消失，在地球历史上并不罕见。【语言提升】unusual adj.不寻常的；罕见的；独特的；与众不同的not unusual 常见的；普遍的It is unusual (for sb.) to do sth.做某事对某人来说

15、是不寻常的。It is unusual that sb.do sth.某人做某事是不寻常的。Its not unusual for him to feel very angry in a situation like this.在像这样的情况下他觉得非常生气并不罕见。He was an unusual man with great business talents.他不同凡响，很有商业天赋。It is not unusual that she reaches out her helping hand.她经常出手相帮。【温馨提示】un-是常见的否定前缀，常可加形容词表示相反的状态。常见的有：un

16、known(未知的)，unsafe(不安全的)，unpleasant(使人不愉快的), unhappy(不高兴的)等。【词汇拓展】unusually adv. 不寻常地usual adj. 通常的than usual 比平时as usual 像平常那样usually adv. 通常地【语境助记】It is unusual that the rain suddenly falls today, but he still goes running in the park as usual. He usually says, “Once you have got into the habit of

17、exercising, you will stick to it.”不寻常的是，今天突然下起雨来，但是他仍然像往常一样在公园里跑步。他经常说，“你一旦养成了锻炼的习惯，就会坚持。”【针对练习】单句语法填空(1)Chopsticks are _(usual) two long, thin pieces of wood or bamboo. They can also be made of plastic, animal bone or metal.(2)This time, we stayed together, in case anything else _(usual) happened.(

18、3)But a few days ago, this ancient town was _(usual) full of people.【答案】(1)usually(2)unusual(3)unusually翻译句子(4)史密斯照例是最后一个到达教室的。【答案】As usual, Smith was the last one to arrive at the classroom.(5)在英国找到一个这么大的湖泊是不寻常的。【答案】It is unusual to find a lake of this size in Britain.3mass adj.大量的(P52) These inclu

19、de the third mass extinction, known as the “Great Dying”， which killed 90% to 96% of all species. 【翻译】这些包括被称为“大灭绝”的第三次物种大灭绝，它杀死了90%到96%的物种。【语言提升】(1)mass n大量，许多； 团，块，堆；群众，民众a mass of许多， 一堆masses of许多，大量的(泛指)the mass of大量的(特指)in mass整个地，全部地the masses群众，平民百姓There is a mass of snow in front of the house

20、. 在房子前面有一堆雪。Mary always seems to have a mass of things to do. 玛丽似乎总是有一大堆事情要做。There were masses of people in the shop yesterday. 昨天商店里人如潮涌。The trains provide cheap and comfortable travel for the masses.火车给大众提供了便宜、舒适的出行方式。(2)mass adj.大量的；群众的，民众的；大规模的mass production批量生产mass culture大众文化mass media大众传媒mas

21、s production批量生产，大量生产His design was accepted and began to enter mass production.他的设计被采纳，并开始大量生产。【温馨提示】a mass of/masses of后可跟可数名词复数，也可跟不可数名词。“a mass of/masses ofn.” 作主语时，谓语动词的数与of后面名词的数保持一致。如：There were masses of children playing in the yard.院子里有很多孩子在玩耍。There is mass of work for her to do.她有一大堆的工作要做。

22、【针对练习】单句语法填空(1)A mass _ colors from the palest ivory to the deepest lemon and then to the most vivid pink shone like a carpet before us.(2)The polar bear is found in the Arctic Circle and some big land _(mass) as far south as Newfoundland.(3)Its time to have lunch, so I think there surely are _(mass

23、) of people in the dining room.(4)With forests destroyed, masses of fertile soil _(be) being washed away each year.完成句子(5)Self-driving vehicles still have a long way to go before they reach _ stage.自动驾驶汽车在进入大规模生产阶段之前还有很长的路要走。(6)One hour before the news conference，_ journalists were in the hall.在新闻发布

24、会开始前一小时，大厅里已经有很多记者了。(7)我开始认真筛选大量的证据。 I began sifting through _.【答案】(1)of(2)masses(3)masses(4)is(5)mass production(6)a mass of/masses of(7)the mass of evidence4varied adj.各种各样的，形形色色的(P52) The reasons for extinctions are varied.【翻译】物种灭绝的原因多种多样。【语言提升】varied adj.不同的，多变的，各种各样的，形形色色的(various)Representativ

25、es from varied parts of the country have arrived in Beijing.来自全国各地的代表们到达了北京。The choir has a varied program of concerts throughout the year.合唱队有一个全年举行各种各样音乐会的计划。He led a full and varied life.他过着丰富多彩的生活。【词汇拓展】vary vi.(根据情况)变化，改变；(大小、形状等)相异，不同vary with随而变化vary from不同于vary in在方面不同、有差异vary fromto从到不等/不同【

26、针对练习】单句语法填空(1)The three groups of violinists _(vary) a lot in their practice times last month.(2)In 2020, World Wildlife Day celebrates biodiversity, including wild fauna and flora, in all its _(vary) and beautiful forms.(3)I like reading books very much, especially storybooks, varying from Chinese

27、stories _ English stories.(4)Changes in price normally vary _ changes of supply and need.(5)Though Lucy and Lily are twins, they vary _ character.【答案】(1)varied(2)varied(3)to(4)with(5)in5decrease vi.& vt.减少 n减少；减少的量(P52) According to scientists, they include volcanic eruptions, asteroids hitting the

28、Earth from space, changes in sea levels, the decrease of the oxygen content of the sea and global warming.【翻译】根据科学家的说法，它们包括火山爆发、小行星从太空撞击地球、海平面变化、海洋含氧量减少和全球变暖。【语言提升】(1)decrease vi.& vt.(使大小、数量等)减少，减小，降低decrease by 减少了(表示减少的比例)decrease to减少到(表示减少后的数量)decrease in在方面减少People planted trees on the waste h

29、ills to decrease soil erosion.人们在荒丘上种植了树木，以减少水土流失。The number of the students in our school has decreased to 1,200我们学校的学生数量已减少到1,200人。Compared with last year, the price of wheat has decreased by 15% this year.和去年相比，今年小麦的价格已降低了15%。(2)decrease n减少，降低(可数或不可数)a decrease in在方面减少on the decrease在减少There has

30、 been a decrease in the number of young people out of work.失业青年人数已经有所下降。The demand for corn is on the decrease each year in this country.这个国家对玉米的需求量在逐年减少。【词汇拓展】increase vi.&vt.(使)增长，增多，增加n增长，增多，增加increase to增加到(表示增加后的量)increase by增加了(表示增加了多大的比例)on the increase在增加【针对练习】单句语法填空(1)In recent years some I

31、nuit people in Nunavut reported increases _ bear sightings around human settlements.(2)In September, an Australian Senate committee reported that there was no question the koalas population is _ the decrease.(3)Also power walking _(decrease) the risks of serious diseases like high blood pressure, he

32、art attacks and certain types of cancers. (4)The accidents have decreased _ 20% since the measures were taken.(5)The crime rate in this area has decreased _ the lowest level nowadays.(6)Tea is still a large part of daily life in the UK today, but it seems to be _ the decrease.(7)Experts predicted th

33、e average global temperature will increase _ 3 over the next century.【答案】(1)in(2)on(3)decreases(4)by(5)to(6)on(7)by6die out灭绝，死光(P52) Although it is not unusual for species to die out naturally, the rate at which this is now happening is cause for concern.【翻译】虽然物种自然灭绝并不罕见，但现在这种情况发生的速度令人担忧。【语言提升】die

34、out意为 “灭绝，死光，消失”This species has nearly died out because its habitat is being destroyed.因栖息地正受到破坏，这一物种已濒临灭绝。To our sadness, many old customs are gradually dying out.让我们伤心的是，许多旧习俗都在渐渐消失。die off相继死去，先后死去die down逐渐变弱，逐渐平息die from/of死于die away逐渐减弱，逐渐消失be dying for sth./to do sth.渴望某物/做某事【针对练习】单句语法填空(1)T

35、he prey species they directly attack will die _.(2)In 2016, just over 400,000 people died _ the disease.(3)So far worldwide, it is reported that more than 90,000 people have been infected with the new coronavirus and more than 3,000 have died _ less than three months.(4)So we did what anyone would d

36、o when pressed for time and, actually lost: we got ice cream. Im not sure if it was because of the ice cream, but at that point, any fear I had died _.【答案】(1)out(2)from(3)in(4)down7blame vt.责怪，指责(P52) This time, human activity will be to blame.【翻译】这一次，人类活动应受到指责。【语言提升】blame vt.责备；谴责；把归咎于blame sb.for

37、(doing) sth.因(做)某事责备某人blame sth.on sb./sth.把某事归咎于某人/某事be to blame for (doing) sth.因(做)某事应受责备；对(做)某事负有责任(不定式用主动形式表示被动意义)Dont blame him for breaking that vase；he is a child after all.别怪他打碎了那个花瓶。他毕竟是个孩子。They blamed the failure of the business on the economic downturn.他们把生意的失败归咎于经济衰退。The hot weather is

38、partly to blame for the water shortage.炎热的天气是缺水的部分原因。blame n责任，责备take/bear the blame for sth. 承担某事的责任lay/put the blame (for sth.) on 把(某事的)责任归咎于We were ready to take the blame for what had happened.我们准备对所发生的事承担责任。Health officials put the blame for the disease on poor housing conditions. 卫生官员们将该疾病归咎于

39、恶劣的住房条件。【语境助记】He is blamed for the big mistake, but he blamed it on others. In fact, it is he, not others, that is to blame for it.他因这次严重的错误受到了责备，但他把它归咎于别人。事实上，应该是他，而不是别人，要对此负责。【考向追踪】高考通常从以下几个角度设题对blame进行考查：(1)to blame作表语或定语时要用主动形式表示被动意义；(2)通过非谓语结构对blame进行考查；(3)blame后的介词既可以用on又可以用for，on表示责怪的对象， for表

40、示责怪的起因。【针对练习】单句语法填空(1)Our task now is not _(blame) the past，but to plan for the future.(2)Chavis is among a growing number of teachers, parents and health experts who believe that smart phones are now partly to blame _ increasing the levels of student anxiety.(3)Joel blamed Harry _ using all of the

41、bug spray. Harry told Joel he smelled terrible, and Joel called Harry a coward.(4)Lots of people find it hard to get up in the morning, and put the blame _ the alarm clock. 【答案】(1)to blame(2)for(3)for(4)on8affect vt.影响(P53) It is clear that human activity has negatively affected all other species on

42、 Earth, including animals and plants. 【翻译】很明显，人类活动对地球上所有其他物种，包括动物和植物都产生了负面影响。【语言提升】affect vt.影响；感染；假装The south of the country was worst affected by the drought.这个国家南方旱情最严重。From the experience I learned how the attitude of theleader affected the members of a team.从这次经历中，我懂得了领导者的态度是如何影响团队成员的。affect vt

43、.(感情上)深深打动(一般用被动形式); 使悲伤(或怜悯等)He was deeply affected by the music.那段音乐深深打动了他。affect vt.(指疾病)侵袭，感染The disease is beginning to affect her brain.疾病开始侵袭她的大脑。【词汇拓展】affection n影响；喜爱，钟爱have/show affection for sb/sth.钟爱某人或某物affections爱情【针对练习】单句语法填空(1)It is certain that peoples views on happiness _ (affect)

44、greatly by their own life experience.(2)His mother had a deep _(affect) for him.(3)When I make a business decision, it comes naturally for my decision to be made in the common interest of all involved because every day I see the people _(affect) by my decision my neighbors, my customers, and my empl

45、oyees as well as the natural world.(4)Instead of spreading misinformation and fueling fearful thoughts, we should do everything we can to support those who are affected _ events such as the COVID-19 outbreak. (5)Both of us had the qualities and virtues that are typical of American actors: humorous,

46、aggressive, and making fun of each other but always with an underlying _(affect)【答案】(1)are affected(2)affection(3)affected(4)by(5)affection9up to高达(P53) If a sixth mass extinction occurs, scientists who have studied the issue believe that up to three quarters of all species on Earth could die out.【翻

47、译】研究这一问题的科学家们认为，如果第六次物种大灭绝发生，地球上多达四分之三的物种将会灭绝。【语言提升】本句中的up to意为“高达(某个数量)”，还可以表示：(1)“达到程度或数量”The spokesman said the high speed train could speed up to 350 kilometers per hour.发言人说，高铁的速度最高可达每小时350千米。Our team played up to its best in the last football league.我们的足球队在上届联赛中发挥了最高水平。(2)“直到为止”，相当于till或untilu

48、p to now直到现在(常与现在完成时连用)up to then直到那时(常与过去完成时连用)Please feel free to call me any time up to half past nine at night.晚上9点半之前任何时间你都可以给我打电话。Up to now，the writer has written six stories，three of which are about country life. 到现在为止，这位作家写了6个故事，其中有3个是关于乡村生活的。(3)“(体力或智力上)能胜任”Im afraid Tim just isnt up to the

49、 job.恐怕蒂姆干不了这份工作。You neednt go back to school if you dont feel up to it.你要是觉得身体还不是很好的话，就不一定要回去上学。(4)表示“是(某人)的责任，由决定，取决于”Its up to sb. to do sth.做某事是某人的职责。/做某事由某人决定。Its up to sb.whether/how/when是否/如何/何时/由某人决定。Its up to you.(交际用语)由你决定。Its up to the travel companies to warn customers of any possible da

50、ngers.旅游公司有义务预先告知游客任何可能的危险。Now that the tool is available to you, it is up to you how to use it.既然这个工具你能用，那么怎么使用它取决于你。Shall we go out for dinner or eat at home?我们是要出去吃饭还是在家吃呢？Its up to you.由你决定。【针对练习】单句语法填空(1)Almost one in ten admits spending up _ three hours outside their normal working day checkin

51、g work emails.(2)Up to now, the program _(save) thousands of children who would otherwise have died.(3)It is up to you _(decide) when to go shopping.(4)He, up to then, _(find) a good subject to write about. 【答案】(1)to(2)has saved(3)to decide(4)had found10be at risk 处境危险，受到威胁(P53) Of course, as we hum

52、ans depend on so many species for our survival, we would also be at risk of dying out. 【翻译】当然，由于我们人类的生存依赖如此之多的物种，我们也会面临灭绝的危险。【语言提升】(1)at risk (from/of sth.)有危险；冒风险As with all diseases, certain groups will be more at risk than others. 所有的疾病都是如此，一些人比另一些人更容易受到威胁。 (2)at the risk of doing sth.冒着的风险At the

53、 risk of showing my ignorance, how exactly does the Internet work? 也许我难免显得无知，可互联网到底是怎么运行的呢？ (3)at risk to oneself/sb./sth.冒着伤及的危险He dived in to save the dog at considerable risk to his own life. 他冒着相当大的生命危险跳到水里去救那只狗。 (4)do sth. at your own risk (常见于告示)自担风险；责任自负Persons swimming beyond this point do s

54、o at their own risk.游泳者越过此界限后果自负。 Valuables are left at their owners risk.贵重物品需看管，否则风险自负。 (5)run a risk (of sth./of doing sth.)冒风险；有的危险People who are overweight run a risk of a heart attack or stroke. 超重的人有犯心脏病和中风的危险。 (6)run the risk (of sth./ of doing sth.) 冒的危险；冒险(做某事)We dont want to run the risk

55、of losing their business.我们不想冒险失去他们的生意。 Investment is all about running risks.投资就是要冒风险。 (7)take a risk/ take risks to do sth.冒险(做某事)Thats a risk Im not prepared to take.我不愿意去冒这个险。 You have no right to take risks with other peoples lives.你没有权利拿别人的生命去冒险。(8)reduce/cut the risk of (doing) sth.减少(做)某事的危险

56、As we all know, it can reduce the risk of contracting the virus. 我们都知道，它可以降低感染病毒的风险。(9)lower the risk of (doing) sth.降低危险【针对练习】完成句子(1)Due to the outbreak of the novel coronavirus pneumonia (NCP), people all over the world are wearing masks to _ _(减少感染的危险)(2)For example, Shanghai is _ (有极大的危险) becaus

57、e of the large population of migrant workers, but the stress level is not in the high level.(3)Consider the recent announcements from the front lines of medical research：A study concluded that women who consume as little as two servings of fish a week _(减少她们的危险) suffering a stroke to half that of wo

58、men who eat less than one serving of fish a month. (4)Jacob Sattelmair, from Harvard University has done a study into how much exercise is needed to _(降低危险) of heart attacks.【答案】(1)reduce/cut the risk of infection(2)at high risk(3)cut/lower their risk of(4)cut/lower the risk11survive v幸存；存活(P53)With

59、out forests, we would have no air to breathe, and without clean water, we would be unable to survive. 【翻译】没有森林，我们就没有空气呼吸；没有清澈的水，我们就无法生存。【语言提升】(1)survive on sth.依靠生活Human life is regarded as part of nature and, as such, the only way for us to survive is to live in harmony with nature.人类生活被认为是自然的一部分，就

60、这一点而论，我们生存的唯一方式是与自然和谐相处。Her parents died in the accident, but she survived.她的父母在那次事故中丧生了，但她活过来了。How do you survive on such a low salary?你是如何靠这么低的工资维持生计的？(2)survive vt.幸存，幸免于难。其宾语通常是war, accident, flood, fire, earthquake, air crash等。Only one baby survived the terrible car crash.在那次严重的汽车撞车事故中只有一个婴儿生还。