八年级英语上册unit7willpeoplehaverobotspart4sectionb课前课件人教新目标版260

acrossthestreet一、SectionB(1a—1d)单词和短语预习。1．across到对面；在……对面词组：acrossthestreet街道对面我住在街道对面的一栋公寓里。Iliveinanapartment___________________．nevergetboredtakeus3．take花费词组：Ittakessb.+时间+todosth.见到更多的机器人可能要花费我们上百年的时间。Itmay_________hundredsofyearstoseemorerobots．2．getbored变得厌烦机器人永远都不会变得厌烦。Robotswill_________________．seemedimpossible100yearsagotomakerobotslooklikehumans4．seem看上去；看起来词组：seemimpossible看上去不可能电脑和火箭100年前看起来也是不可能的。Computersandrocketsalso_________________________________．5．look看起来词组：looklike+n.看起来像……科学家们正在努力地使得机器人看起来像人类。Scientistsarenowtrying_________________________________．servantsboreddancetalkIndia二、SectionB—2b篇章理解预习。(一)预习课文内容，完成下列各句。1．Inmovies,robotsareusuallylikehuman__________．2．Robotswillneverget_______．3．SomerobotsinJapancanwalkand_______．4．Manyscientistsbelieverobotswillevenbeableto______likehumansin25to50years．5．In_______,scientistsmaderobotsthatlooklikesnakes．C(二)预习课文并选择正确的答案。()1．AccordingtoParagraph1andParagraph2,robots__________.A．canhelptobuildcarsinmoviesB．candoeverythinginfactoriesC．canhelpwiththehouseworkinmoviesD．canworkindangerousplacesinfactoriesD()2．WhatdoesJamesWhitethink?A．Hethinksthatrobotslooklikehumans．B．Hethinksthatrobotscanreallythinklikeahuman．C．Hethinksthatrobotsareabletotalklikehumans．D．Hethinksthatrobotswillneverbeabletowakeupandrealizewheretheyare．ACD()3．What’smeaningoftheword“shape”inParagraph4?A．材料.B．功能.C．外形.D．品种.()4．WhichwasPOSSIBLE100yearsago?A．Cars．B．Rockets．C．Computers．D．Robots．()5．What’sthemainideaofthepassage?A．Thehistoryofrobots．B．Theshapesofrobots．C．Thefunctions(功能)ofrobots．D．Thedevelopmentofrobots．overandoveragain dothesamethingsaswedobefuntowatchbeabletodosth.wakeup have/hasdifferentshapesfalldown lookfor三、SectionB—2b篇章短语归纳。1．一次又一次______________________2．和我们做一样的事_______________________________3．看起来很有趣_________________4．有能力做某事_____________________5．醒来_________6．有不同的外形____________________________7．倒塌；坍塌___________8．寻找___________四、完形填空。Lifetodayismucheasierthanitwashundredsofyearsago.Butatthesametime,therearemanynewproblemstoday.Oneof1problemsispollution.Pollutioncomes2manydifferentforms(形式).Weseeit,wedrinkit,andeven3it.Thepollutionisgettingmoreserious.Themorepeoplethereare,the4pollutionthereis.Alongtimeago,pollutionwasn’tsoserious,5therewerenotsomanypeople,butnowhumansarepollutingthewholeworld.Manycountriesaremaking6tofightagainstpollution.They7peoplefromusingcoalinhousesandfactories,andfromputting8smokeintotheair.Theyalsoadvisepeopletousetheircarslessandgotoworkbybus,bikeoreven9.Theearthisourhome,wemust10it.Thismeanskeepingitsland,waterandairclean.ACBDCBABAC()1．A．bigB．biggerC．biggestD．thebiggest()2．A．inB．toC．outD．for()3．A．wantB．hearC．makeD．have()4．A．moreB．lessC．mostD．least()5．A．ifB．becauseC．soD．as()6．A．predictionsB．friendsC．rulesD．cars()7．A．finishB．stopC．saveD．fight()8．A．cleanB．freeC．dirtyD．clear()9．A．walkingB．flyingC．drivingD．running()10．A．agreewithB．complainaboutC．takecareofD．lookfor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。