高中英语 Unit 20 Period Ⅰ previewing课件 北师大版选修7.ppt

美文阅读 ourworldin2050尽管人类在改造大自然方面已取得了不少成绩 但是人类频繁的活动已使今日的地球失去了原有的艳丽姿色 whenscientistsscantheglobalhorizon over fishing lossofspecieshabitat watershortage climatechange andinvasive 侵害的 specieslooktobethebiggestthreatstotheearth whatwillourworldbelikein2050 populationdecreaseandincrease therearetwofeaturesinthegrowthofworldpopulation first theannualincreaseinpopulationin15europeancountries inthepastfewyears hasbeenonly300 000 theunitednationsestimatesthatby2050 thepopulationofeuropeancountrieswilldecreasefromthecurrent0 72billionto0 63billion second thepopulationindevelopingcountriesisgrowingrapidly overthepast50years therateofincreaseinpopulationhasbeenfastestintheleastdevelopedcountries by2050 thepopulationofafricaisexpectedtoreach1 8billion 0 9billionmorethanitscurrentpopulation globalwarmingarecentresearchreportindicatesthatitisquitepossiblethattheearth stemperatureisrisingwellabovethepreviousestimate sucharesultwouldhavesevereconsequences 后果 aresearchteamfromtheuniversityofcoloradousedsatellitedatatoestimatethattheicesheetwillloseupto48cubicmilesby2050 iceshelvesintheantarcticwillhavedecreasedbymorethan7 200squaremilesinthenextfourdecades watershortageafrica sriversfacedramatic 戏剧性的 changethatwillleaveaquarterofthecontinentseverelyshortofwaterbythemiddleofthecentury inthoseareaswherethereisalreadyawatershortage it sgoingtohaveadevastating 毁灭性的 effect thestudysays ifyou renowwalking5kmtotheneareststreamtogetwater by2050 it sgoingtomeanwalking30kmormovingyourwholehouseholdclosertothewatersource fourwheelsgood fourwheelsbadthecarhastransformedthelivesofpeople buttheplanetispayingtoohighaprice todaythereare620millionprivatecarsworldwide tosaynothingofbuses vansandlorries withcurrentgrowthtrends thatnumberisexpectedtoreachastaggering 难以置信的 threebillioncarsworldwideby2050 ifwecontinuetoburnfossilfuelsatcurrentrates levelsofcarbondioxideintheatmospherewillreach550ppm partspermillion byaround2050 thiswillincreaseglobaltemperaturesbetween1 4and4 8 by2050 andsealevelswillrisebetween0 09and0 78meters 教师用书独具演示 教学目标本课时主要是通过学生对学案所给出的内容的学习 了解本课文中所出现的词汇 初步了解课文以及相关的背景知识 对下一堂课就课文的全面理解起到一个铺垫作用 教学地位本单元是让学生通过探讨主要介绍了跟我们生活与学习联系紧密的科学领域 并且介绍了20世纪科学领域的一些先驱者以及太空 最后的疆界 通过本节的学习 使学生对未来的世界这一话题既感到陌生 但又显示出浓厚的兴趣和求知欲 从而带着好奇心去了解并探究 此外 上好本堂课会增进学生了解科学对未来影响做出的展望 新课导入建议用多媒体向学生展示一段有关未来的科幻英语短片 如 阿凡达 黑客帝国 老师问学生一些问题 如你们知道未来的生活是什么样子 让学生讨论并用英语简单表达出来 从而引出今天的单元话题 演示结束 篇章结构阅读modernheroes完成下列表格 答案 1 foraliving2 endlesspossibilities3 handier4 ourvoices5 stainless6 starvation7 equality8 theory9 human10 solarsystem 语篇理解1 whichpeopleofthefollowingcanbecalledfuturologists a peoplewholiketoreadfantasystories b peoplewhowriteaboutthefuturethemselves c peoplewhoplanthefutureforaliving 2 whatwasthemostcommonthemeinsciencefictionnovelsin19thcentury a adventureb futurec love 3 thefuturologistswillholdaseminar aimingto a discusstheendlesspossibilitiesofthefutureb solvesomeproblemsaboutenergyandnaturalsourcesc studythechancesofpeoplesettingonotherplanets 4 whywillmanypeoplewanttoattendtheseminar a becausetheyarecuriousaboutthefuture b becausetheywanttomakefriendswithfuturologists c becausetheydreamofstartingnewenterprisesbasedonthepredictionsmadebyfuturologists 5 whatisthepredictionbythemiddleofthecentury a anewtypeofelectronichumanmighthavedeveloped b noonewilldieofstarvation c garmentswillbesostrongthattheywillnevergetoldandworn 答案 1 c2 b3 a4 c5 a 课文缩写assess dieofstarvation basedon forfun mass predict futurologist handier atleast clickintonowadays 1 ofpeoplewonderaboutthefuture someimaginewhattheworldwillbelikeinthefuture someauthorseven2 thingsthathavesincehappened however forsomepeople thinkingaboutthefutureisnotjust3 theyplanthefutureoftheworldforaliving whoarecalled4 aseminarwillbeheldatnewcastlethisweekend lotsofpeoplewillattenditwiththehopeofstartingnewenterprises5 thepredictionstheywillhearatthemeeting i6 thewebsitesofafewfuturologistsandlearntsomepredictions herearesome bytheyear2025 noonewill7 becausetherewillbefoodforeveryone bytheyear2030 peoplecanlivefor8 150years tinyrobotsmaybesentaroundthecellsofourbodiesto9 ourhealthandcarryoutrepairstokeepushealthy inthenextfewyears computerswillbecome10 答案 1 masses2 predict3 forfun4 futurologists5 basedon6 clickedinto7 dieofstarvation8 atleast9 assess10 handier 词义搭配1 assista inashorttime soon2 recreationb tobring sth uptodate3 handyc toevaluateordecideorfixthevalueof sth 4 shortlyd tohelporaid5 updatee apersonwhoisanexpertinaspecialaspect 6 conflictf entertainment7 assessg tostruggleorfight8 specialisth convenienttohandleoruse 答案 1 d2 f3 h4 a5 b6 g7 c8 e 短语填空lookinto forfun basedon dieof liveon nolonger carryout link to 1 thenewfilmisanovelbychili 2 itwon tbeaneasyplanto 3 youcanyourtvyourstereoforbettersounds 4 thegovernmenthassetupaworkingpartytotheproblemofdrugabuse 5 ididitjust 6 theyfishandrice 答案 1 basedon2 carryout3 link to4 lookinto5 forfun6 liveon 句型背诵1 bytheyear2015 theclothingindustrywillhaveproducednewtypesofmaterialthatwillremainstainlessnomatterwhatyouspillonthem 到2015年 服装工业将生产出新型的材料 不论什么东西洒到材料上面 都不会留下污点 2 redwinestainswillnolongerruinclothes garmentswillalsobesostrongthattheywillnevergetoldorworn 红酒渍将不再毁掉衣物 衣服也将会结实耐穿 永远不会变旧或磨损 3 someliketoreadfantasystoriesandimaginewhattheworldwillbelikein10 50oreven 1 000years time 有些人喜欢阅读幻想故事 想象世界在10年 50年甚至1000年后会变成什么样 4 b