高中英语选择性必修四 Unit 3　Section A　Reading and Thinking 课件

1、Unit 3SEA EXPLORATION素养导航晨读晚诵素养导航晨读晚诵Green Sea TurtlesGreen sea turtles are the worlds largest species of hard-shelled sea turtle.While most of them weigh about 136 to 181 kilograms,some can be as heavy as 204 kilograms.These turtles are found nesting along the coastline of more than 80 countries,wi

2、th the largest nesting populations found in Costa Rica and Australia.素养导航晨读晚诵Green sea turtles spend most of their lives underwater,where they can rest for up to five hours at a time before coming up for air.Green sea turtles are also known to sunbathe on land.Unlike most other sea turtles,adult gre

3、en sea turtles eat a primarily plant-based diet consisting of seaweed and sea grass.Scientists believe these green foods give the sea turtles fat its green colour.The shell of the green sea turtle is usually a shade of brown or olive.Similar to other sea turtles,green sea turtles migrate long distan

4、ces between their feeding grounds and their nesting sites,with recorded distances of longer than 2,600 kilometres.素养导航晨读晚诵Female green sea turtles leave the water in order to lay eggs on the beach and will choose the same nesting spot as where they were born.A female will dig out a nest and lay abou

5、t 115 eggs.Then shell cover the eggs with sand and return to the sea.After about two months,the babies will hatch from their eggs.The first few years of a green sea turtles life are spent floating at sea,where they feed on plankton(浮游生物).As they grow older,the turtles move to waters along the coast

6、where they find sea grass to eat.Adult green sea turtles face many threats,primarily from humans,including injuries from boats,being caught in fishing nets and pollution.Newly hatched sea turtles are also at risk of being hunted by animals such as birds,crabs,and raccoons as they move from their nes

7、ts out to the sea.素养导航晨读晚诵词海拾贝coastline n.海岸线sunbathe vt.晒日光浴primarily adv.主要地migrate vt.迁徙hatch vt.孵化素养导航晨读晚诵典句欣赏Green sea turtles spend most of their lives underwater,where they can rest for up to five hours at a time before coming up for air.译文:绿海龟的一生大部分都在水下度过,在那里它们可以一次休息五个小时,然后再上来呼吸空气。分析:本句是一个复合

8、句。Green sea turtles spend.为主句,where they can rest for up.是定语从句,before coming up for air是介词短语作时间状语。素养导航晨读晚诵探究思辨1.What do sea turtles and green sea turtles have in common?2.What do you think is the main threat to green sea turtles?答案1.They both migrate long distances between their feeding grounds and

9、their nesting sites.2.We humans.Section AReading and Thinking.知识体系图解 重点词汇 1.merchant n. adj. 2.fleet n. 3.behold vt.4.royal adj. 5.spice n. 6.maritime adj. 商人;批发商 海上货运的舰队;机群;车队看;看见皇家的;王室的;高贵的(调味)香料 海的;海运的;海事的7. n.故事;叙述8. vt.扩展;使伸长;延长9. vt.商定;达成(协议)vi.谈判;磋商;协商10. n.等级;水平;联合会;联赛11. vi.& vt.(使)撤回;撤离12.

10、 n.航道;海峡;频道13. n.纽带;关系vt.& vi.增强信任关系;使牢固结合taleextendnegotiateleaguewithdrawchannelbond重点短语1. 起航;开航2. 独领风骚3. 退出;撤回4. 在手头;可供使用5.search for6.become known as7.develop relations with8.under the command of9.for the benefit ofset sailin a league of ones ownwithdraw fromin hand寻找;搜寻作为而著名 与发展关系 在的指挥下为了的利益重点句

11、式Over the centuries,further trading allowed more exploration of the regions to the west of China,as recorded in Du Huans Record of My Travels in the eighth century.阅读导学A.阅读P26-27课文内容,匹配段落大意。1.Part 1(Para.1)A.Zheng Hes voyage to the west.2.Part 2(Para.2) B.The Belt and Road Initiative.3.Part 3(Para.3

12、) C.How the Silk Road came into being.4.Part 4 (Paras.4-5) D.Chinas participation in some important projects.5.Part 5 (Para.6) E.China will reach out across the sea far into the future.6.Part 6 (Para.7) F.Mankinds greatest achievements result from trade and curiosity.答案1.F2.C3.A4.B5.D6.EB.根据P26-27课文

13、内容,选择正确答案。1.What inspired European explorers to search for sea routes from west to east?A.Trade and curiosity. B.The tales of Marco Polo.C.The tales of Columbus.D.Merchants and explorers.答案B 2.What did the trade deals between merchants from different countries result in?A.Further exploration of the

14、oceans.B.Mankinds greatest achievements.C.Construction of the ancient Silk Road.D.Better understanding of each others culture.3.Zheng He and his fleets sailed as far as .A.the Indian OceanB.the South China SeaC.the east coast of AfricaD.the mouth of the Red Sea答案D 答案C 4.Why is there an urgent need t

15、o study the Arctic?A.To promote foreign trade.B.To look for more natural resources.C.To strengthen the bonds between countries.D.To know more about climate change and its effects.答案D 重点词汇重点句式随堂练习1.However,merchants and explorers from the East set sail from east to west many years before Columbus fir

16、st did.(P26)然而,在哥伦布第一次起航的很多年前,东方的商人和探险家们就从东向西航行了。【词汇精讲】set sail起航;开航A thousand boats set sail on a long stretch of the river.百里江面,千帆竞发。重点词汇重点句式随堂练习【词汇拓展】 We set sail for France at high tide.我们在涨潮时起航去法国。The white sails billow with the breezes they catch.一张张白帆随着微风舞动。I shall get myself a little boat an

17、d sail it around the world.我要给自己买一条小船,驾着它环游世界。重点词汇重点句式随堂练习 重点词汇重点句式随堂练习2.A trading route across the sea was also extended along the coasts of the Indian Ocean,centred around Ceylon (now Sri Lanka).(P26)一条横跨海洋的贸易路线也沿着印度洋海岸延伸,以锡兰(现在的斯里兰卡)为中心。【词汇精讲】extend vt.扩展;使伸长;延长We are making plans to extend the p

18、arking area.我们在制定扩大停车场的计划。Our company plans to extend its operations into Africa.公司打算将业务扩展到非洲。重点词汇重点句式随堂练习【词汇拓展】He has applied for an extension to his visa.他已申请延长签证。Wed like to extend a warm welcome to our foreign friends.我们热烈欢迎外国朋友。重点词汇重点句式随堂练习 重点词汇重点句式随堂练习3.Here,merchants from China and many other

19、 places met to negotiate trade deals,which also led to more awareness of each others cultures.(P26)在这里,来自中国和许多其他地方的商人聚集在一起协商贸易协定,这也使人们更加了解彼此的文化。【词汇精讲】negotiate vt.商定;达成(协议)vi.谈判;磋商;协商We have been negotiating for more pay.我们一直在协商加薪。There were reports that three companies were negotiating to market th

20、is kind of drug.据报道,有三家公司在洽谈这种药的市场推广。重点词汇重点句式随堂练习【词汇拓展】They are happy to negotiate with us in this way.他们很高兴和我们用这种方式来协商。The rent is a matter for negotiation between the landlord and the tenant.租金可以由房东和租户协商确定。重点词汇重点句式随堂练习 重点词汇重点句式随堂练习4.These fleets were a sight to behold and were in a league of their

21、 own at that time.(P26)这些船队在当时蔚为壮观,独领风骚。【词汇精讲】league n.等级;水平;联合会;联赛When it comes to cooking,Im not in her league.提到烹饪,我的水平远比不上她。Thus the first workers league came into being.第一个工人联盟就这样产生了。Britain has dropped from second to third place in the league.英国在联赛中的排名从第二位降到了第三位。重点词汇重点句式随堂练习【词汇拓展】As a singer,h

22、e is in a league of his own.作为歌唱家,他独领风骚。A house like that is out of our league.那样的房子不是我们能买得起的。重点词汇重点句式随堂练习 重点词汇重点句式随堂练习5.Although China withdrew from further expeditions after 1433,these land and sea routes remained active channels between other cultures for centuries.(P26)尽管中国在1433年以后退出了进一步的探险活动,但这

23、些海陆航线几个世纪以来在其他文化之间一直保持活跃。【词汇精讲】withdraw vi. & vt.(使)撤回;撤离The teacher reached into his pocket and withdrew a sheet of notepaper.老师把手伸进口袋,掏出一张便签。He and the others withdrew to their rented rooms.他和其他人回到了他们租住的房间。重点词汇重点句式随堂练习【词汇拓展】I need to make a withdrawal from my checking account.我要从我的支票账户里提款。My fathe

24、r decided to withdraw some money from the bank.我爸爸决定从银行取些钱。重点词汇重点句式随堂练习重点词汇重点句式随堂练习重点词汇重点句式随堂练习6.The aim of this initiative is to encourage cooperation and trade across the historic Silk Road areas,and strengthen the bonds between China and the rest of the world.(P27)这一倡议的目的是鼓励在历史悠久的丝绸之路地区开展合作和贸易,加强

25、中国与世界其他地区的联系。【词汇精讲】bond n.纽带;关系vt.& vi.增强信任关系;使牢固结合A bond of friendship had been formed between them.他们之间形成了一条友谊的纽带。The agreement strengthened the bonds between the two countries.协议加强了两国间的联系。What had bonded them instantly and so completely was their similar background. 是相似的生活背景使他们很快变得亲密无间。重点词汇重点句式随堂

26、练习【词汇拓展】They have always had a special bond with their neighbours.他们一直以来都和邻居有一种特殊的情谊。Its actually the best time of the year to bond with communities.实际上,这是一年中和团队建立联系的最佳时机。重点词汇重点句式随堂练习 重点词汇重点句式随堂练习7.Hundreds of years on,and with the latest technology in hand,the need to trade and the desire to enhanc

27、e relationships will drive China to reach out across the sea far into the future.(P27)数百年过去了,随着最新技术的使用,贸易需求和加强关系的愿望将驱使中国在遥远的未来跨越海洋。【词汇精讲】in hand在手头;可供使用The business in hand was approaching some kind of climax.手头的生意似乎快到紧要关头了。The Olympic organisers say that matters are well in hand.奥运会的组织方说各项事务都在掌控之中。

28、重点词汇重点句式随堂练习【词汇拓展】Industrial progress should go hand in hand with the development of agriculture.工业的进步应与农业的发展齐头并进。When they met with difficulties,their neighbours gave them a hand.当他们遇到困难时,邻居们伸出了援手。重点词汇重点句式随堂练习重点词汇重点句式随堂练习重点词汇重点句式随堂练习Over the centuries,further trading allowed more exploration of the

29、 regions to the west of China,as recorded in Du Huans Record of My Travels in the eighth century.(P26)几个世纪以来,贸易的进一步发展使得中国西部地区得到了更多的开发,这一点在8世纪杜环的经行记中有所记载。【句式剖析】本句是一个复合句。主句是further trading allowed.。as recorded in.是非限制性定语从句的省略形式,句子补全为:as it was recorded in.。As you can imagine,we all enjoyed the party.你

30、可以想象到,我们在那次聚会上都玩得很开心。重点词汇重点句式随堂练习【句式拓展】(1)as用于引导限制性定语从句时,主要与such、as、the same连用,其意为“像的”“凡是的”“一类的人(物)”。He is not such a man as would leave his work half done.他并不是一个做事半途而废的人。You must show her the same respect as you show me.你必须对她表现出与对我同样的敬重。重点词汇重点句式随堂练习(2)as用于引导非限制性定语从句时,根据情况可位于主句之前或之后,有时也可插在主句中间,其意为“这

31、件事”“这一点”。The moon travels round the earth once every month,as is known to everybody.众所周知,月球每月绕地球转一周。As is often the case,a smart building is the crystallization of collective wisdom and skills.通常情况就是这样,一座完美的建筑是集体智慧和技巧的结晶。重点词汇重点句式随堂练习(3)as引导非限制性定语从句常见的有:as we all know 众所周知as I can remember正如我所记得的as o

32、ften happens正如经常发生的那样as we expect正如我们预料的那样as was expected 正如预料的那样as can be seen 看得出来as may be imagined正如可以想象的那样as has been said above如上所述as we all can see正如我们都能看到的那样as is often the case像常规那样重点词汇重点句式随堂练习重点词汇重点句式随堂练习重点词汇重点句式随堂练习.课文语法填空It is well-known that mankinds greatest achievements have often res

33、ulted from trade and 1.(curious) and people of early civilisations had a strong desire 2.(complete) the great map of the world.curiosityto complete重点词汇重点句式随堂练习In ancient times,Chinese merchants shipped silk to India,the Middle East,and Rome,along 3. became known as the Silk Road.Trade between merchants from China and other places resulted in better 4. (understand) of each others cultures.In the Ming Dynasty,seven large fleets 5.(lead) by Zheng He set sail from the South