Unit+1+Topic+2+Section+B 仁爱版九年级英语上册

Unit1

TheChangingWorldTopic2SectionB学习目标预习检测知识梳理课堂总结学习导航重点探究当堂检测能熟悉并正确运用本课时的重点单词和短语12能够掌握数字的拼读1.—_______thepopulationofIndia?

—_______about1.27billion.

A.Howmanyare;TheyareB.Howmuchis;ThatisC.Whatis;Itis D.Howis;Thisis2.—Whichcountryhasthe_____population,India,AmericaorChina?

—America.A.largest B.smallestC.least D.fewest预习检测CB3.—Howmanyworkersarethereinyourcompany?—Aboutseven_______.

A.hundred B.thousandsC.hundredof D.thousandsof4.Chinahas_______manypoliciestosolvetheproblem.A.carriedoutB.takenoutC.putoutD.givenout5.—Tomworkshardeveryday.—_________.Healwayspassesthedifficultexam.A.SoheisB.SoisheC.SohedoesD.SodoesheAAC知识梳理Keypoints※population是一个集合名词

①population常与定冠词the连用，作主语用时，谓语动词常用第三人称单数形式。

e.g.Thepopulationisincreasingfasterandfaster.

②表示人口的"多"或"少"，不用"much"或"little"，而要用"large"或"small"。

e.g.

Indiahasalargepopulation.

③询问某国、某地有多少人口时,不用"Howmuch...?",而用"Howlarge...?";在问具体人口时用"What...?"。

e.g.

Howlargeisthepopulationofyourhometown?

Keypoints※

Anditisincreasingby82millioneveryyear.increasev.(使)增加，（使)增大，增多。

increaseby＋倍数或百分数，表示“增加了……倍或百分之……”。e.g.Comparedwithlastyear,ourpayhasincreasedbythreetimes.与去年相比，我们的工资增长了3倍。

increaseto＋具体的增长后的数字，表示“增加到了……”。e.g.Ourriceoutputhasincreasedto6milliontonsthisyear.我们的水稻产量今年增长到了600万吨。Keypoints※Soitis.该结构主要用于加强语气，其意为“的确如此、确实如此”

，表示后者赞同前者的话或意见，只是进一步强调并重复前句所述的内容。前后句的主语指的是同一个人或物。该结构中的助动词do根据前文的情况也可换成is,am,are,was,were,does,did,can,could等。e.g.—Hehasdoneagoodjob.他干得不错。—Sohehas.他的确干得不错。

Keypoints※

Luckily,Chinahasalreadycarriedoutsomepoliciestosolvetheproblem.carryout实行，进行，执行。e.g.Itwon’tbeaneasyplantocarryout.那并不是一个容易实施的计划。e.g.Thisisanewpolicy,andtheywillcarryitoutnextyear.这是一项新政策，他们将在明年实施它。世界人口问题Let’swatchavideo…PresentationA:What’sthepopulationoftheworld?B:It’sabout

7.2billion.

Anditisincreasingby82millioneveryyear.增加，增大人口7.2Thepopulationoftheworld:7.2billionEveryyearwehave82millionmore.China:1.36billionIndia:1.27billiontheUSA:323millionRussia:143millionCanada:36milliontoomuch_______noisetoomany________people[ɪnˈkri:s]增加_________________isabigprobleminChina.Thatcausesalotofproblems.Populationincrease[kɔ:z]导致toomuch_______________smoke/pollutiontoomuch________traffic1aLook,listenandsay.Kangkang:Wow!Whatalargepopulation!Maria:

What?Kangkang:Look,itsaystheworldhasapopulationof7.2billion.Anditis

increasingby82millioneveryyear.Maria:Mmm,that’sreallyalot.Whichcountryhasthelargestpopulation?Kangkang:Chinahasthelargestpopulation.Ithasalreadyreached1.36billion,andIndiaissecondwith1.27billion.Maria:What’sthepopulationoftheUSA?Kangkang:

323million.(Kangkangisreadingareportonpopulationinthenewspaper.)Maria:Oh,Isee.Itshowsthatthepopulationindevelopingcountriesislargerthanthatindevelopedcountries,doesn’tit?Kangkang:Yes,What’smore,thepopulationindevelopingcountriesisgrowingfaster.Maria:Soitis.Thepopulationproblemhasbecomemoreseriousindevelopingcountries.Kangkang:Luckily,Chinahasalreadycarriedoutsomepoliciestosolvetheproblem.A：Whatalargepopulation!Theworld…7.2billion.…82millioneveryyear.B：Whichcountry…?A：China…reach…,andIndia…with….B：…theUSA?A：323million.B：Itshows…developingcountries…developedcountries.A：…isgrowingfaster…B：Soitis.Thepopulationproblem…developingcountries.A：China…carryout…solvetheproblem.ActoutthedialogRoleplay1bListento1aandmatchtheinformation.1.theworld2.China3.India4.theUSAA.323millionB.7.2billionC.1.36billionD.1.27billion1cRead1aandfillintheblanks.

Theworldhasapopulationof7.2billionanditisincreasingby__________everyyear._______hasthelargestpopulation.Ithasalreadyreached__________andIndiais_________with1.27billion.Thepopulationindevelopingcountriesis______andisgrowing________thanthatindevelopedcountries.Luckily,ourcountryhascarriedoutsome

policiesto_______theproblem.82millionChina1.36billionsecondlargerfastersolveThepopulationoftheworld:7.2billionEveryyearwehave82millionmore.China:1.36billionIndia:1.27billiontheUSA:323millionRussia:143millionCanada:36million3Workingroupsanddiscussthepopulationoftheworld.Thefollowingchartandquestionsmayhelpyou.1.Whichofthese5countrieshasthelargest/smallestpopulation?What’sthepopulationofit?2.Whatcanyoutellfromthepopulationindevelopingcountriesandindevelopedcountries?3.Whatproblemsdoesthelargepopulationcause?4.Whatmeasuresdoyouthinkshouldbetakentosolvethepopulationproblem?Chinahasthelargestpopulation.ThepopulationofChinais1.36billion.Canadahasthesmallestpopulation.ThepopulationofCanadais36million.Thepopulationindevelopingcountriesislargerthanthatindevelopedcountries.Thelargepopulationmaycauselesslivingspace,morepollutionandsoon.

通过以上活动，我们可以总结出：现在世界人口已经达到72亿了，并且每年增长1.__________。其中中国是最多人口的国家，且人口达到2.___________；其次是印度，人口达到3.___________。而美国人口只有4.___________。当堂检测见DCF课件活动小结82million1.36billion1.27billion323million数字的表达方法Let'slearn1,000,000,000one

billion1,000,000one

million1,000one

thousand3.14three

point

onefour100one

hundred

朗读时，将每三位数看做一个单位，从右往左依次为thousand千，million百万，billion十亿。每个单位按照百、十、个位向下读，其中百位到十位之间要加入and。billion十亿e.g.1.3billion

十三亿billion与million,thousand,hundred一样，在表示确切数字时，不能使用复数形式，但是，不表示确切数字时，如成百、成千、上万时，要以复数形式出现，且要与of连用，构成短语。e.g.hundredsof

数百，成百上千的thousandsof

成千上万的millionsof

数百万billionsof

数十亿1011101221431,00010,0001,000,000100,000,0001,000,000,000onehundredandoneonehundredandtenonehundredand

twenty-twoonehundredand

forty-threeonethousand（千）tenthousand（一万）onemillion（百万）a/onehundredmillion（一亿）onebillion（十亿）Athousandmillion

百位到十位之间要加入and。111,121,435,678

↓

↓

↓billion十亿million百万thousand千读：onehundredandelevenbillion

onehundredandtwenty-onemillionfourhundredandthirty-fivethousand

sixhundredandseventy-eight逗号读法朗读时，将每三位数看做一个单位，从右往左依次为thousand千，million百万，billion十亿。每个单位按照百、十、个位向下读，其中百位到十位之间要加入and。6，500，431，729thousandmillion