搜索
Unit4ReadingMovingtoMarsWordsandExpressionsplanetcrowdedpollutedrapidincrease(all)overagainpassengeralla/thespeedofn.行星adj.拥挤的adj.被污染的adj.快的，迅速的n.增加再；重新n.乘客以……的速度WordsandExpressionsuncomfortableoxygenintheformoftastyspeciallyfloatcomparecompareto/withadj.使人不舒服的；不适的n.氧气以……的形式adj.味道好的adv.专门地，特地vi.飘浮；漂浮vt.&vi.比较与……相比WordsandExpressionsinterplanetarynetworkchallengingrapidlyadj.行星间的n.网络adj.挑战性的adv.快地，快速地Let’senjoysomevideos.MovingtoMars1.TolearnsomethingaboutlifeonMars2.TolearnthewordsandphrasesinthispassageWords:planetpollutedrapidincreasepassengerrapidlytastycomparePhrases:alloveragainata/thespeedofintheformofcompareto/withPatterns:Itishopedthat…Hereiswhatlifetherecouldbelike.Ourspacecraftaretooslowtocarry…Robotswoulddomostoftheirworksothat…DoyouthinkitispossibleforhumanbeingstoliveonMars?DiscussionLet’senjoyavideo.Readthepassage,matchthewordsontheleftwiththemeaningsontheright.crowdedrapidpopulationalloveragainpassengertastyspeciallycompareforonepurposeasecondtimefromthebegindecideinwhatwaythingsaresimilarordifferenthavinganicetastefullofpeoplehappeninginashortperiodoftimeapersonwhoridesinacar,bus,train,etc.butdoesnotdriveitthetotalnumberofpeopleinanarea,acountry,etc.TaskoneMatchthekeywordswiththelinks.Writethecorrectlettersintheblanks.CDBEAReadthepassageandchosethebestanswer.√√√√TasktwoReadthepassageandchosethebestanswer.√√√√Readthepassageandanswer:Whatwilllifebelike?Transportatpresent2100Howdowegetthere?Howlongdoesittake?Howwillwegetthere?Howlongwillittake?TaskthreeFoodWhatwillweeatonMars?GravityWillitbeabigproblem?Whyisitabigproblem?Whyisitverydangerous?Topreventthis,whatshouldpeopledo?educationWhatkindofschoolwillstudentsstudyin?Whatdotheycalltheirteachers?Completethislist.Usetheinformationfromthearticleonpages52and53.TaskfourReadthepassagecarefullyandcompletethelist.EarthtodayMarsin2100Itispollutedandcrowded.Itwouldbecleanandhavelotsofspace.Spacecraftareslow.Thereisenoughwaterandoxygen.Spacecraftwouldtravelatthespeedoflight.Theremightnotbeenoughwaterandoxygen.EarthtodayMarsin2100Therearemanykindsoftastyfood.Gravityisnotaproblemforus.Manypeopleliveinsmallflats.Peoplehavelittletimetorelax.Studentsstudyatrealschools.Foodwouldmostprobablybeintheformofpillsandwouldnotbesotasty.Peoplewouldhavetowearspecialboots.Peoplemightliveinhouseswithhugecomfortablerooms.Peoplecouldhavemoretimetorelax.Studentswouldstudyatonlineschools.Fillintheblanks.TheEarthisbecomingmoreandmorecrowdedandpolluted_________the_____________inpopulation.Itishopedthatpeoplecouldstart____________onMars.Hereiswhatlifetherecouldbe.__________2100,thejourneytoMarsmightonlytakeabout20minutesinspacecraftthattravel_____________light!Andfoodwouldmostprobablybe____________pillsandwouldnotbeso______.rapidincreasebecauseofalloveragainBytheyearatthespeedofintheformofTaskfivetastyPeoplewouldhaveto_______bootsthatarespeciallydesignedtopreventthemselves________________(floatoff)intospace.Atthesametime,peopleonMarswouldhavemorespace.Theymightliveinhouseswithhugecomfortablerooms.Also,robotswoulddomostoftheirwork_______theycouldhavemoretimetorelax.LifeonMarswouldbeinteresting__________challenging.fromfloatingoffsothataswellaswear1.Atpresent,ourspacecraftaretooslowtocarrylargenumbersofpassengerstoMars.目前，我们的宇宙飞船太慢了，无法运送大批的乘客去火星。Largenumbersof表示“大量的”=alargenumberofLargenumbersofpeoplegotravellingduringtheNationalDayholiday.2.Withthedevelopmentoftechnology,bytheyear2100,thejourneymightonlytakeabout20minutesinspacecraftthattravelatthespeedoflight!随着技术的发展，到2100年，乘坐以光速飞行的宇宙飞船，行程或许只要大约20分钟！Iwassecondintheracewithatimeof14.2seconds.介词with短语，在句中常用作状语，表示原因、条件、时间、伴随、方式等。我以14.2秒的成绩在比赛中位列第二。BythetimeIgottothestationthetrainhadalreadygone.by表示“到...为止，截止...”等我到达火车站时，火车已经开走了。ata/thespeedof表示“以……的速度”Thecarismovingataspeedof100kilometresperhour.小汽车正以每小时100公里的速度行驶。3.ThegravityonMarsisonlyaboutthree-eighthsofthatontheEarth.火星上的重力大约只有地球上的八分之三。TheaironMarsismuchthinnerthanthatontheEarth.在做比较时，我们常用that/those指代句中类似或相同的那一部分。此句中that指代前面的gravity.火星上的空气要比地球上的稀薄的多。Three-eighths八分之三分数在英语中通常是借助于基数词和序数词来共同表达的。其中基数词表示分子，序数词表示分母。如：one-tenth十分之一athird三分之一注意：分子除用one外，也可用a；twothirds三分之二fourfifths五分之四但是，1/2不能说a(one)second,而要说a(one)half。1/4和3/4可以说a(one)fourth和threefourths,但常用aquarter和threequarters表示。如果分子大于1，分母要用复数形式。如：选择题。About______ofthestudentsarefromforeigncountries.(2011山东东营)A.threefourB.threefourthC.thirdfourthD.threefourths翻译句子。我们班五分之三是女生。_____________thestudentsinmyclass________girls.Three-fifthsofare4.ComparedwithlifeontheEarth,lifeonMarswouldbebetterinsomeways.与地球上的生活相比，火星上的生活在有些方面要好些。Childrenseemtolearnmoreinterestingthingscomparedto/withwhenwewereatschool.comparedwith…表示“与……相比”此句中的“comparedwiththelifeontheEarth”为v-ed短语作状语。与我们上学时相比，孩子现在学到的有趣东西似乎更多一些。拓展：compare...to意为“把……比作……”。Shakespearecomparedtheworldtoastage.莎士比亚把人世比作舞台。用comparewith和compareto的正确形式填空。1.Hecannot_____________Shakespeareasawriteroftragedies.2.Youcannot_________thiswar_____theVietnamwar(越南战争).comparewithcompareto4.LifeonMarswouldbeinterestingaswellaschallenging.火星上的生活，不仅有挑战性，还很有趣。IwanttovisitAndrewaswellasMartin.aswellas意思为“不