Unit1TheChangingWorldTopic2SectionC课件仁爱科普版（2012）九年级英语上册(1).pptxVIP

Unit1TheChangingWorldTopic2SectionC

能熟悉并正确运用本课时的重点单词和短语12能学会谈论人口问题

新课导入socialworsesupplysofarparagraphopportunitypercentoffernewbornnatureWordgameTheonewhoremembersthemostwordsisthewinner.

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notenoughwaterandenergylesslivingspaceLargepopulationcausedmanysocialproblems.

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1._____ofthestudentsareboysinourschool.A.Twothird B.TwothreesC.Twothirds D.Secondthree2.Somemeasureshas_____solvingtheproblem.A.beengoodat B.donewellatC.workedwellin D.takencareof预习检测CC

3.Edisonisknown_____agreatinventor.A.asB.forC.inD.on4._____yourhelp,Imadegreatprogressinmath.A.Thanksto B.ThanksforC.Thankto D.Thankfor5._____largepopulation,manyproblemsbegantoappear.A.BecauseofB.BecauseC.SoD.AsAAA

notenoughwaterandenergylesslivingspaceheaviertrafficworseenviromentLargepopulationcausedmanysocialproblems.

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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=threequarters

notenoughwaterandenergylesslivingspaceheaviertrafficworseenviromentfewerjobopportunitiesLargepopulationcausedmanysocialproblems.

Readandwritethetitleofthepassage.PopulationProblemsPre-reading

1aReadandunderstand.1.Beforeyoureadthepassage,discussthequestionswithyourpartne