高中英语 Unit 5 Listening cspeaking and reading课件 新人教版选修8.pptVIP

listening speakingandreading 1 listentothetapeandfillthelayersinthe wastepaperbasket diagrambelow yogurtpots orangeskin wastepaper usedenvelopes answerkeyforexercise2 eachlayerlooksdifferentastheyareuncovered soyoucantellwhereonelayerstartsandanotherfinishes inthewastepaperbasket themostrecentlayeris anolderlayerisbelowthatandtheoldestlayeris atthetop atthebottom alllivingthingshave intheirbodies whentheydie thecarbon ata rate themethodmeasures ofcarboninbonesorplantsusingradioactivityandcan howoldtheremainsare startstodisappear fixed theamount workout carbon note theageofthebuildingdependsonthenumberoflayersitisrestingon themorelayers themorerecentthebuilding answerkeyforexercise3 theoldestbuildingisbbecauseithasnolayersunderneathit thesecondoldestbuildingiscbecauseithasonelayerunderneathit themostrecentbuildingisbuildinga ithastwolayersunderneath zh howcanyoutellhowoldthebonesarewhenyoufindthem listeningtext p42 datingmethods zhouhepinghascometoaskthearchaeologist richardleakey howhedatestheboneshefinds rl therearetwomainways thefirstuseslayersinthegroundandthesecondusestheradiocarbondating zh howdoesthelayermethodwork rl well manylayersofsoilwereproducedatdifferenttimes eachtimepeoplebuildhousesandlive somewhere theymakeanoccupationlayer eachhasadifferentcolorandtexture zh howdoesthathelp rl lookatthediagraminyourbook thinkofyourwastepaperbasket whenyoucameintoworkyouthrewtheorangeskinintoit later someonethrewtheiremptyyogurtpotsintoit thensomewastepaperwasadded finallysomeonethrewawaysomeusedenvelopes howmanylayersarethere zh therearefourlayers rl good nowwhichlayeristhelatest zh now letmethink yes it llbetheoneonthetop whichistheusedenvelopes rl andwhere stheoldestlayer zh atthebottom rl welldone whenwefindbonesinlayersofsoil weknowtheyarethesameageasthesoil zh isee rl nowlet sthinkaboutthesecondmethod zh iremember it scalledtheradiocarbondatingmethod that sastrangename rl yes itusestheradioactivitytomeasuretheamountofcarboninlivingthings thecarboninadead bodydisappearsatafixedrate weknowhowlongthistakes sowecanmeasuretheamountofcarbonandworkouthowoldaboneorplantis zh that sveryclever isitveryaccuratetoo rl therearesomeproblems soyou arealwaysgivenadateplusorminussomeyears forexample yourbonemaybedatedto10 000yearsagoplusorminus100years thismeanstheboneisbetween9 900yearsand10 100yearsold zh howclever howoldarethebonesfromthezhoukoudiancaves rl theyarebetween250 000and40 000yearsold zh perhapswecangoandvisitthesitetogethersometime rl ofcourse wheneveryoulike answerthefollowingquestionsafterreadingthetext 1 whichjobsdiddahudo 2 whichjobsdidlalado 3 whoworkscooperativelyandwhodoestasksalone 4 whodoesthemostdangeroustasks 5 wheredoesthedangercomefrom readingandspeaking 北京猿人的化石首次发现于1927年 1929年12月2日发现第一个完整的头盖骨 到1937年已发现的北京人的头盖骨共5个 1941年12月太平洋战争爆发后 在几个美国人手里弄得下落不明 1966年又发现一个残破的头盖骨 总共发现了属于40多个个体的北京人化石 时间距今约七十万年至二十万年 北京人 北京猿人的特征 能够制造和使用劳动工具 能使用天然火 摆脱了杂交的婚姻形态 生活艰苦 寿命比较短暂 北京人头盖骨化石 北京猿人复原图 北京人使用过的石器 北京人石器制作法 北京人生活想象图 山顶洞人 距今时间 18000年前 地点 北京周口店龙骨山山顶洞穴 体形 同现代人大体一样 脑容量 1300 1500毫升 生产和生活 开始采用磨制和钻孔技术制造石器 骨器制造骨针 缝制兽皮衣服产生了原始宗教仪式过着氏族公社的生活 山顶洞人头骨 山顶洞人 1933年北京市房山县周口店龙骨山山顶洞出土 骨针长8 2厘米 孔径0 31 0 33厘米 这是中国已发现的时代最早的骨针之一 其针身保存完好 针孔处破裂 针尖锐利 表面有刮磨痕迹 针孔是用尖状器刮挖而成 山顶洞人的生活用具 骨针 sampleanswerstoabovequestions 1 catchfish repairstonetools makescrapersandaxe heads 2 collectfruitandnuts preparefood 3 bothmenandwomenworkcooperatively forexample lala smotherandauntswerepreparingthemeatofdeerandpigoverthefire mendotasksalone 4 mendothemostdangeroustasks 5 thedangercomesfromthewildanimals answerkeyforexercise2 1 makingandrepairingtools 2 fishing 3 cuttingdowntrees 4 huntinganimals 5 protectingthegroupfromharm 1 collectingnuts fruitandwater 2 cuttingupmeatandfishforcooking 3 preparingskinstomakeclothes 4 preparingfood 5 lookingafterchildren answerkeyforexercise3 men stasks patient toolmaking dangerous hunting someindividual toolmakingandrepairing andsomeco operative hunting skilful toolmaking protective ofgroup women stasks affectionate togroup co operative cooking caring providingfood patient collectingfood skilful cooking individual collectingnutsandfruit co operativetasks individualtasks mostdangeroustasks menhuntinganimals womendoingcookingandpreparingfoodmenmakingorrepairingtools womencollectingfruitandnutsmenhuntinganimals answerkeyforexercise4 wherethedangercomesfrom sharingoftasks menandwomenhadclearlydividedtasks fireandcollectingnutsneededtobedoneeverydaybutkillinganimalswould wildanimalslivingnearthecaves onlybedonenowandthen sothewomen staskswerecontinuousandthemen stasksweremoreperiodic wordsandexpressions 1 ifonlyitcouldbejustlikelastyear 要是能像去年那样就好了 ifonly但愿 要是 就好了 其后一般用虚拟语气 ifonlyshehadlookedaheadandplannedbetter ifonlyhehadcome v toexpressapprovalof someoneorsomething especiallybysuchclapping 赞赏 鼓掌向 某人或某物 表示赞赏 尤指鼓掌欢呼everyoneapplaudedwhentheplayended 演出结束时 大家都热烈鼓掌 iapplaudyourdecision 我赞成你的决定 2 applaud 3 acceleratea toincreasethespeedof加速 促进加快 的速度这部新车加速效能良好 thenewcarhasgoodacceleration b tocausetohappenearlier 正式 催促他决定加快他的课程进度 hedecidedtoacceleratehiscourses tocaptureandholdbriefly theattention forexample engage引起注意吸引并短时间吸引住 如注意力 吸引花的艳丽色彩引起苏珊的注意 thebrightcolorsoftheflowersarrestedsusan sattention 4 arrest havingawhirlingsensationandatendencytofall眩晕的 眼花的感到眩晕并要摔倒的adizzyheight令人晕眩的高度theoldwomanwasdizziedbythestrongwind 那位老太太被风吹得头昏眼花 thedisasterdizziedhisbrain 那场灾难弄得他头脑昏乱 5 dizzy 6 relief解脱的感觉ifeltgreatreliefwheniheardihadpassedtheexamination 听说我已经通过了考试 感到轻松多了 1 the housesmellsasifithasn tbeenlivedinforyears a littlewhitewoodenb littlewoodenwhitec whitewoodenlittled woodenwhitelittle practiceadjectives 2 jolmsmith asuccessfulbusbusinessman hasa car a largegerm