数词基本知识及课堂练习

345或threehundredandforty-five。与ofscoresofpeople指Theyarrivedintwosand 表示\"年代\"in+the+在乘法运算的一种表示法里，如Threefivesis（are）fifteen。序数词的缩写形式如first---1st thirty-first---31st等。三、数词的用法主语+谓语+倍数（或分数）asadj.asIhavethreetimesasmanyas 主语+谓语+倍数（分数）+thesize（amount，length…）of…。例如：Theearthis49timesthesizeofthemoon. 地球是月球的49倍。主语+谓语+倍数（分数）+形容词（副词）+than…。例如：Thegrainoutputis8percenthigherthisyearthanthatoflastyear.今年比去年8%还可以用by+Theproductionofgrainhasbeenincreasedbyfourtimesthisyear.今年粮食产4倍。1时1/3one-third；3/37threeandthree- martyrshaveheroicallylaiddowntheirlivesfortheThousanduponthousandofb.Thousandandthousandsc.Thousandsuponthousandsofd.ThousandandthousandTheyreceived oflettersabouttheirTVdozenb.dozenanddozencscored.Whoisthat inthefronta.oneb.theonec.firstd.theWehaveproduced thisyearaswedidinasmuchcottontwiceb.astwicemuchc.muchastwicecottond.twiceasmuchTheearthisabout asthea.asfiftytimebigb.fiftytimesasbigc.asbigfiftytimed.fiftyastimesThepopulationofmanyAlaskancitieshas inthepastthreea.morethandoubledb.moredoubledthanc.muchthandoubledd.muchdoubledThemoonisabout indiameterasdiameterasthea.one-threeaslargeb.onethreeaslargec.one-thirdaslarged.onethirdasFivehundredyuanamonth enoughtolivea.isb.arec.isbeingd.has ofthebuildingswerea.Threefourthb.Threefourc.Three-fourthsd.Three-Consult forquestionsabouta.thesixindexb.indexsixc.sixthindexd.indexnumberingShewenttothecountryside inthemorningatnine/onJunefirst,1968b.onJunefirst,1968/inthemorningatc.atnineinthemorning/onJunefirst,1968d.onJunefirst,1968/atnineintheThree-fourthsofthesurfaceoftheearth coveredwitha.areb.isc.wered.Thismonththeproductionofstainlesssteelinoursteelworkshasincreased 2,000a.withb.inc.ond.Withtheminiaturizationofthestructuralcomponentstheweightoftheseelectricdeviceshasdecreased 30percent.a.asb.withc.ind.TheOlympicGamesareheld a.everyfouryearsb.everyfouryearc.everyfourthyearsd.everyfour-Asheisnotingoodhealth,hegoestohisfactoryonly justtolearnsomethingabouttheprogressofexperiment.a.onceaweekb.oneweekc.onetimeaweekd.oneaThreestudents inthisuniversitycomefromthea.oftenb.outofintenc.outoftend.inStringsofthesamethicknessmadeofnylonare fivetimesstrongerthanthoseb.fivetimestrongerthanc.fivetimesstrongthanthosed.fivetimesstrongerasthewheelsoftheoldwagonarenearly thoseofamoderna.twicethesizeofb.