Unit1TheChangingWorldTopic2SectionC课件仁爱科普版（2012）英语九年级上册

Unit1TheChangingWorldSectionCTopic2一、掌握以下单词：social,supply,natural,worse,sofargovernment,take

measurestodosth,thankstosb/sth等。二、Keysentences：⑴…andaboutonefifthofthepeopleintheworldliveinChina.⑵…ourgovernmenthastakenmanymeasurestocontrolthepopulation.⑶Thankstothepolicy,Chinaisdevelopingquicklyandpeople’sliving

conditionsareimprovingrapidly.三、强化练习现在完成时的用法。四、谈论世界和中国人口问题。Languagegoals

Newwords:1.socialadj.社会的；社交的2.worseadj.更差的，更糟的

adv.更差，更糟3.supplyv.

提供，供应

n.供应量；补给；供应4.sofar到目前为止5.governmentn.政府，内阁6.takemeasurestodosth.采取措施做某事7.thanksto幸亏，由于

Newwords:8.naturaladj.天然的；天生的9.paragraphn.

段；段落10.opportunityn.机会，时机

11.newbornadj.

新生的，初生的12.percentn.百分之......

13.offerv.提供（东西或机会）；主动提出知识梳理Keypoints分数词的表达法:

1.结构:

a)分子用基数词，分母用序数词。1/3—onethird(one-third)

b)当分子大于1时，分母加复数。

3/4—threefourths(three-fourths)

2.分数词的几种特殊形式：

1/3—onethird=

athird1/4—onefourth=aquarter

1/2—onesecond=ahalf3/4—threefourths=threequartersKeypoints分数用法注意：a)分数作定语时，与所修饰的名词之间加of。e.g.我们班三分之二的学生是男生。________________thestudentsinourclassareboys.

b)分数后面可接可数名词，也可接不可数名词，谓语动词的单复数和分数词后的名词保持一致。

Twofifthsofthemilk______(be)drunkbyTom.

Onethirdofthestudents_______(be)girls.isareTwothirdsofThepopulationindevelopingcountriesislargerthanthatindevelopedcountries.Chinahasthelargestpopulation.Whatproblemsdoesthelargestpopulationcause?It’s7,898,236,143.What’sthepopulationoftheworld?Whatalargepopulation!Keyphrasesbecauseof 由于lesslivingspace 更少的生存空间atthesametime 同时supplysth.tosb.=supplysb.withsth. 提供某物给某人providesth.forsb.=providesb.withsth.提供某物给某人offersb.sth.=offersth.tosb. 提供某物给某人satisfypeople’sdailyneeds 满足人们的日常需求naturalenvironment 自然环境sofar 到目前为止toomuchnoise

toomanypeoplePopulationincreaseisabigprobleminChina.Thatcausesalotofproblems谈论人口压力导致的社会问题PopulationproblemsWhatproblemsdoesthelargepopulationcause?ReadParagraph1andfillintheblanks.Asiahasapopulationof_________________.That’stosay,almost______ofthepeopleintheworldliveinAsianow.morethan3billionhalfParagraph1Theworld’sandAsia’spopulation.1.Edisonisknown_____agreatinventor.A.asB.forC.inD.on2._____yourhelp,Imadegreatprogressinmath.A.Thanksto B.ThanksforC.Thankto D.Thankfor3._____largepopulation,manyproblemsbegantoappear.A.BecauseofB.BecauseC.SoD.AsAAAKeyphrases10.takemeasurestodosth.采取措施做某事

11.workwellindoingsth. 在做某事方面起到好的效果12.thanksto 多亏了13.livingconditions 居住条件14.dealwith 处理15.offerjobopportunities 提供就业机会3billion÷6.8billion≈1／2(a/onehalf)50percent(50%)AlmosthalfofthepeopleintheworldliveinAsia.In2010,theworld'spopulationwasabout6.8billion.MorethanthreebillionpeopleliveinAsianow.That'salmosthalfoftheworld'spopulation.2010年，世界人口约68亿，现在亚洲居住的人口超过了30亿，它几乎是全世界人口的一半。1.3billion÷6.8billion≈1／520percent(20%)About

onefifth

ofthepeopleintheworldliveinChina.oneWhatsocialproblemshasitcausedParagraph2Theproblemscausedbylarge

population.fifthonesixthoneninthonetwentiethfivesixthstwoninthsseventwentiethsATTENTION分基母序Chinahasthelargestpopulationintheworld,andaboutonefifthofthepeopleintheworld

live

inChina.中国拥有世界上最多的人口，世界上大约五分之一的人口居住在中国Becauseofthelargepopulation,thereis

lesslivingspaceforeachfamily.因为人口庞大，每个家庭居住空间更小。Andit'sdifficultforlotsofpeopleto

findjobs.对很多人来说，找工作是很难的.Atthesametime,thelargepopulationhascausedmanyotherdifficultiesforthewholenation.同时，庞大的人口对整个国家也引发很多其它的困难。situationnow...havetakenmeasuresto......worked......areimproving......isbecoming...one/ahalf

aquarterthreequartersthreeandahalfBecauseofthelargepopulation,thereis__________________foreachfamily.ReadParagraph2andfillintheblankslesslivingspaceBlackboardDesignLargePopulationsocialproblemlesslivingspaceThereis...for...in....fewerjobopportunitiesItis...for...to....lesswaterandenergyItis...for...to...to....MorecrowdedcitiesManycitiesare....HeaviertrafficThetrafficis....situationnow...havetakenmeasuresto......worked......areimproving......isbecoming...Naturalenvironmentsarebecomingworseandworse.自然环境正在变得越来越糟糕。Thelargepopulationhasbeenaseriousproblem.庞大的人口已经是一个严峻的问题。

Sofar,ourgovernmenthastakenmanymeasurestocontrolthepopul