六級強化聽力第六完畢講下

學(xué)前必看我們是一手資源 主次重要信息放前主次首段轉(zhuǎn)Manypeoplebut后面的內(nèi)容往往是總結(jié)性信tosumup,inbriefinparticular,allinall,generallyspeaking,conclude,conclusion,inaword,so,yousee,infact,ok,anyway,inthe重復(fù)性信息實詞重文章中反復(fù)出現(xiàn)的term,通常是文章微觀方向?qū)Ρ绒D(zhuǎn)折 舉例因果關(guān)系處 解釋定義建議意見處強調(diào)轉(zhuǎn)折對比although,though,eventhough,despite,inspiteof,however,but,yet,while,not...but...,unexpected,expected,unfortuna 轉(zhuǎn)折后面的信息為重因果關(guān)系because,for,as,since,bedueto,leadto,resultfrom,resultin,consequently定義例：inotherwordsitiscalledwecallitbeknownas,thatistosay等A wecallbeAwecallbeknowninotherB建議意見youshould,suggest, mend,whynot,whydon'tyou,ifIwereyou中常出現(xiàn)，考查解決方強調(diào)mostimportant,especially,justremember,舉例forexample,forinstance,suchas,take...for通通常考查舉例的目的--為了證明某解釋whichmeans...,thatistosay,meantthat,knownas,forshortOK.Let'sgetgoing.TodayI'mgoingtotalkabouthowtheasteroidbeltwasdiscovered.And...I'mgoingtostartbywritingsomenumbersontheboard.Heretheyare:We'llstartwithzero,then3,...6,...12.Uh, lmewhatI'm FemalestudentMultiplyingby2?Right.I'mdoublingthenumbers,so2times12is24,andthenextoneI'mgoingtowriteafter24wouldbe...Femalestudent48.Then96.We'llstoptherefornow.Uh,nowI'llwriteanotherrowofnumbersunderthat. lmewhatI'm ng.4,7,10...HowamIgettingthissecondrow?MaleAdding4tothenumbersinthefirstrow.I'madding4toeachnumberinthefirstrowtogiveyouarow.Sothelasttwowillbe52,100,and lmewhat FemalestudentPuttingadecimal?Yes.Idividedallthosenumbersby10byputtinginadecimalpoint.NowI'mgoingtowritethenamesofthe netsunderthenumbers.Mercury...Venus...Earth...So,whatdothenumbersmean?Doyourememberfromthereading?MaleIsitthedistanceofthe netsfromtheSun?Right.Inastronomicalunits--notperfect,tantalizinglyclose.ThevalueforMarsisoffby...6or7percentorso.It's...butit'swithin10percentoftheaveragedistancetoMarsfromtheSun.ButIkindofhavetoskiptheoneafterMarsfornow.ThenJupiter'srightthereat5-pointsomething,andthenSaturnisabout10astronomicalunitsfromtheSun.Um,well,thispatternisknownasBode'sLaw.Um,itisn'treallyascientificlaw,notinthesenseofpredictinggravitationmathematicallyorsomething,butit'sattemptingapatterninthespacingofthe nets,anditwasnoticedbyBodehundredsofyearsago.Well,youcanimaginethatthesewassomeinterestinwhythe2.8spotinthepatternwasskipped,andum...buttherewasn'tanythingobviousthere,intheearlyescopes.Thenwhathappenedinthelate1700s?Thediscoveryof...?FemalestudentAnothernet?Thenextnetout,Uranus--afterAndlook,Uranusfitsinthenextspotinthepatternprettynicely,um,notperfectly,butclose.AndsothenpeoplegotreallyexcitedaboutthevalidityofthisthingandfindingthemissingobjectbetweenMarsandJupiter.And escopes,remember,weregettingbetter.SopeoplewenttoworkonfindingobjectsthatwouldbeatthatmissingdistancefromtheSun,andthenin1801,theobjectCereswasdiscovered.轉(zhuǎn)折AndCereswasintheright ce--themissingspot.Uh,butitwaswaytoofainttobea net.Itlookedlikealittlestar.Uh,andbecauseofitsstarlikeappearance,um,itwascalledan"asteroid."OK?"Aster"isGreekfor"star,"asin"astronomy."Um,andso,Cereswasthefirstandisthelargestofwhatbecamemanyobjectsdiscoveredatthatsamedistance.Notjustonething,butalltheobjectsfoundatthatdistancefromtheasteroidbelt.Sotheasteroidbeltisthemostfamous

successofhisBode'sLaw.That'showtheasteroidbeltwasdiscovered.總總結(jié)性信What'sBode'sAlawofAnestimateofthedistancebetweenMarsandApredictionofhowmanyasteroidsthereApatterninthespacing Whydoestheprofessorex inBode‘sLawtotheTodescribethesizeoftheTo inhowtheasteroidbeltwasToex inhowgravitational sinfluencetheTodescribetheimpact escopesonWh