八年级英语上册unit7willpeoplehaverobotspart1sectiona课前课件人教新目标版257

paperplanetpeaceskypollutionseafutureenvironmentearth一、SectionA单词预习。1．纸；纸张________2．行星_________3．和平__________4．天空______5．污染；污染物___________6．海；海洋_______7．未来的_________8．环境______________9．地球_________oncomputerswillbefree二、SectionA重点短语及目标句型预习。1．Theywillstudyathomeoncomputers．他们将在家里的电脑上学习。oncomputer在电脑上20年后，学生们将在电脑上学习。Studentswillstudy______________in20years．2．Everythingwillbefree．每件东西都将会是免费的。free免费的明天的午餐将免费。Lunch______________tomorrow．dogslivetobetalkaboutthefuture3．Peoplewilllivetobe200yearsold．人们将会活到200岁。livetobe…活到……狗能活多少年？Howmanyyearscan_________________?4．What’syourpredictionaboutthefuture?关于未来你有什么样的预测？aboutthefuture关于未来年轻人喜欢谈论未来。Youngpeopleliketo_______________________．Therewillbeareingreatdanger5．Therewillbefewerpeople．将会有更少的人。Therewillbe将会有/将会存在东莞将会更少的污染。_______________lesspollutioninDongguan．6．Theenvironmentwillbeingreatdanger．环境将处于极大的危险中。beindanger处于危险之中老虎们正处于极大的危险中，我们应该努力保护它们。Tigers_____________________,soweshouldtrytoprotectthem．playpartweatherbelike7．Everyoneshouldplayapartinsavingtheearth．每个人都应该在拯救地球这一工作中发挥作用。playapartin+(动)名词在……中起作用机器人将会在人们的生活中起到重要的作用。Robotswill______animportant______inpeople’slife．8．Sowhatwillthefuturebelike?那么未来将会是什么样子的?明天的天气将会是什么样子的？Whatwillthe_________________tomorrow?三、完形填空。Inrecent(最近的)years,thingshavechangedalot.Ithinklifeinthe1willbemoreunbelievable.Perhaps,therewillbefewerpeople2ontheearthinthefuture.Wherewillthehumansgo?Wemaylivefarawayfromthe3.MaybeMars(火星)isthebestplacetoliveon.Peoplewillgetthere4spaceship.Butthey5paymuchmoneyfor6.Why?Becausethedevelopmentofscienceandtechnologywillmakeiteasy.Beforethetrip,everybodyneedstobooka7andbuyakindofsuit,whichtheywillwearinthespace,itcanmakethemwalkaroundMarsanddotheirjobs8onMars.Theywill9needto10theircreditcards(信用卡)withthem.Moneywillnotbeseenatthattime.Therewillbehouses,banks,shops,andschoolsontheMars.Everyoneinthefuturewillhavemorefreetimetoenjoytheirlivesbecausetheywillhaverobotstohelpthemdomostoftheboringjobs.ACBDDBABAA()1．A．tomorrowB．daysC．earthD．future()2．A．liveB．livingC．livedD．lives()3．A．sunB．earthC．moonD．mars()4．A．byB．atC．forD．in()5．A．won’tB．can’tC．don’tD．mustn’t()6．A．himB．itC．themD．us()7．A．seatB．roomC．placeD．ticket()8．A．easilyB．heavierC．worriedlyD．interestingly()9．A．tooB．eitherC．alsoD．sometimes()10．A．takeB．haveC．giveD．buy四、短文填空。Billlivesinaveryfarvillage.Heknowslittleabouttheoutsideworld1henevergetsoutofhisvillage.Oneday,hegotaradio2hisunclewholivesinthecity．Hewasveryexcitedand3theradiotoallhisfriends．“Great!”Sheela,oneofhis4said.“Couldyoupleasegetoneforme,too?”anotherfriendMashiasked.OfcourseBillfeltveryproudofthe5.However,theradio6workingonlyafewdayslater.Billwasverysadbutdidn’tknow7todo.Afriendofhistold8togototherepair(修理)shopintown.Sohedid.Themanintheshop9twodeadcockroaches(蟑螂)intheradio．Billstartedcrying．Themanwassurprised,“Whyareyou10,myboy?”Billsaid,“Becausethetwosingersdiedinmyradio．HowamIgoingtolistentonicesongs?”becausefromshowedfriendsradiostoppedwhathimfoundcrying1．________2．_____3．_______4．________5．_______6．________7．_____8．____9．______10．__________一、压强知识点一知识点二知识点一、压力、压强1.在下图中能够正确表示压力的是() 2.坐沙发比坐木椅舒服,是因为()A.弹簧的弹力和人的重力平衡B.弹簧弹力和人体对沙发的压力平衡C.弹簧弹力减小了人体对沙发的压力D.人体和沙发的接触面积较大CD3.垂直压在物体表面上的力叫压力。方向和物体表面垂直。4.铁钉越尖,越易被钉入木板,说明压力的作用效果与受力面积有关。知识点一知识点二知识点二、增大、减小压强的方法5.如图所示的做法中,为了减小压强的是()A知识点一知识点二6.生物进化过程中,生物的某些部位长成了特殊的形状,这有利于生物的生存。如图所示,啄木鸟的嘴是通过减小受力面积而增大压强的。一些高层建筑的地基建得很宽大是为了增大受力面积,减小压强。