Unit5Lesson29课件冀教版(2012)九年级英语全册

Unit5

LookintoScience

Lesson29

DNA—TheStoryofYou！Doyoulooklikeyourmotheroryourfather?Doyouknowthereason?BeacuseyourDNAcomesfromyourparents.WordsandPhrases

DNA脱氧核糖核酸

blueprintn.蓝图generaladj.一般的

complexadj.复杂的

twinn.双胞胎

repeat v.重复；复述patternn.模式

identifyv.确认；鉴别relatedadj.有关的

grandson n.孙子；外孙granddaughtern.孙女instruction n.指示；说明generallyadv.berelatedto与...有关grandsonsrelationship关系ListeningandReadingCarefulReadingReadPara.1----Para.3andanswerthequestions.1.Whatisablueprint?2.Whatistheblueprintoflife?3.Whichismorecomplex,buildingalivingthingorbuildingahouse?4.HowdoesnaturechangetheDNAinlivingthings?5.What

aspects

ofapersonarestronglyinfluencedbyDNAbeforebirth?CarefulReadingReadPara.1----Para.3andanswerthequestions.1.Whatisablueprint?Ingeneral,ablueprintisadrawingthatshowshowtoputahousetogetherwith/usingmanydifferentparts.2.Whatistheblueprintoflife?DNA.3.Whichismorecomplex,buildingalivingthingorbuildingahouse?Buildingalivingthingisfarmorecomplexthanbuildingahouse.4.HowdoesnaturechangetheDNAinlivingthings?IttakesmillionsofyearsfornaturetochangetheDNAinlivingthingstomakethemfittheworldtheylivein.5.WhataspectsofapersonarestronglyinfluencedbyDNAbeforebirth?Aspectssuchasheight,eyecolor,andfootsize.方面ingeneral=generallyspeaking

总的来说much,alot,alittle,abit,even,still,far等修饰形容词和副词的比较级。Ittakessb.sometimetodosth.beinfluencedby受...影响haveaninfluenceon对...有影响

what...dowith=how...dealwith如何处理ReadPara.4----Para.8andanswerthequestions.1.DosometwinshavethesameDNA?2.HowcanscientistshelpwithhealthproblemsrelatedtoDNA?3.IsyourDNAineverypartofyourbody?

4.WheredoesyourDNAcomefrom?5.WhatcanscientistsidentifyfromyourDNAbesidesyourself?ReadPara.4----Para.8andanswerthequestions.1.DosometwinshavethesameDNA?2.HowcanscientistshelpwithhealthproblemsrelatedtoDNA?Yes,theydo.TheycanlookforproblemsinDNAandsometimeshelppeoplebeforetheybecomesick.3.IsyourDNAineverypartofyourbody?

Yes,itis.4.WheredoesyourDNAcomefrom?Yourparents.Peoplewhoarerelatedtoyou,suchasparentsandgrandparents.5.WhatcanscientistsidentifyfromyourDNAbesidesyourself?除了...（美中不足）becausedby

由...造成beableto

do=cando能够做...bethesameas

和..一样不但...而且berelatedto和..相关4.Exceptforsometwins,everylivingthinghasitsownuniqueDNA.【辨析】exceptfor,except,besides,but(1)exceptfor“除了”,表示对主体的肯定和局部的否定(2)except“除了……之外”,从整体中排除该部分。(3)besides“除……之外，还有”,表示后面内容包含在整体中(4)but“除……之外”,常与no,nothing,none,nobody等词连用。巩固练习1.Weallwentthere________Tom.2.Heisagoodman____________thehottemper.3.Ihavefivebooks____________this.4.Thereisnothing________adeskintheroom.exceptexceptforbesidesbutGrammar定语从句

定语从句是指在句中作定语的______。

先行词是被定语从句所修饰的词（通常是名词或代词）。

关系词，也叫作引导词，是在从句中替代先行词，在定语从句中充当一定的成分，通常是______或______，作_____时常可以省略。从句主语宾语宾语关系词的用法先行词在从句中作主语在从句中作宾语在从句中作定语指代人who/thatwhom/who/thatwhose指代物which/thatwhich/thatwhose关系词1.（黄岗）Youshouldbethankfultothosepeople____helpedyou.A.whichB.whomC.whoD.whose2.（随州）--Whyareyousoworried?

--I'velostthewatch_____mydadboughtmeonmybirthday.A.whatB.whoC.whoseD.which3.（咸宁）ReadersonCCTVisagreatTVshow_____expressesourtruefeelingsbyreadingaloudinpublic.A.whomB.whoC.whoseD.that定语从句4.Thisisthemostexcitingmatch_____Ihaveeverbeento.A.whoB.whichC.thatD.whose5.Theboy____fatherisadoctorstudiesveryhard.A.whoB.whichC.thatD.whose6.Ilikethehouse_____windowisbig.A.whoB.whichC.thatD.whose7.LiuYangisthefirst

Chinesewomanastronaut____hasevertraveledinspace.A.whoB.whichC.thatD.whose定语从句ExercisesⅠ.Fillinthebankswithcorrectwords。1.Ing______,womenlivelongerthanmen.2.Iswealth__________(和...相关)happiness?3.Ididnothingyesterday____（除了）seeafilm.4.________(除了)runnin