step-by-step3000第三册unit9答案及原文.doc

step-by-step3000第三册unit9答案及原文.doc

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英语专业学生经典的听力材料

Unit9waystoTravel

PartIWarmingup

A

1.ThisnewsitemisaboutBoeing's18billionnewordersthisyearforitsnew777jetliner.

2.Thisnewsitemisaboutpossiblemergersbetweenairlines.

A2

Tapescript:

1.Boeing,theworld'sleadingcommercialairplanemaker,announcedithas18billiondollarsinnewordersthisyearforitsnew777jetliner.ThisfigureputsdemandfortheBoeingaircraftaheadofcomparablemodelsproducedbyrivalAirbusofEurope.

2.BritishAirwaysandDutchcarrierKLMconfirmtheyareinactofmergertalks.SwissAirwonapprovalfortakingmajoritycontrolofBelgium'sSabenaAirlinesandtherewasanotherflurryoftake-overdiscussionsamongsomemajorAmericancarriers.TheycomeontheheelsofnumberoneUnitedAirlines'offertobuynumbersixU.S.Airwaystwoweeksago.Thenation'snumbertwo,AmericanAirlines,andthecountry'sthirdlargest,Delta,havebeenhavingwhataredescribedaspreliminarydiscussionsaboutapossiblecombination.AmericanhadreportedlybeentalkingwithNorthwestaboutahookupaswell.ThetopthreeU.S.airlines,United,AmericanandDeltacurrentlycontrol56percentofU.S.airtraffic.Ifthemergersgothrough,they'dcontrol85percent.

B

Monorail

1.Monorailsystemsrelyonaverysimpletechnology:

rubber-tiredcarsridingonanarrowconcreteguide-way.

2.Monorailsystemsarecapableofspeedsof65milesperhourandofferridequalitycomparabletoconventionalrailtransittechnologies.

3.Monorailsystemsaresafeandmoreenvironmentallysensitivethananyotherelevatedtransittechnology.

4.Andnoiseandneighborhooddisruptioncausedbymonorailconstructionaredramaticallylowerthanotherformsofmasstransit.

Maglev

1.Oneofthemostexitingrecentinnovationsinrailroadtechnologyismagneticlevitation,orMaglev,whichreliesontheprincipleofmagnetism--attractionandrepulsion.

2.Thisnewtechnologywillresultintrainsthatarefaster,smoother,moreefficient,morecomfortable,andmoreenvironmentallysound.

LightRail

1.Lightrailtransitisanelectricrailwaysystemcharacterizedbyitsabilitytooperatesinglecarsormulti-cartrainsalongsharedorexclusiverights-of-wayatgroundlevel,onaerialstructures,insubways,oroccasionallyinstreets.

2.Itisabletoboardanddischargepassengersatstationplatformsoratstreet,track,orcar-floorlevel,andisnormallypoweredbyoverheadelectricalwires.

3.Themaximumspeedoflightrailtrainsisnormally60milesperhour（100kmperhour）.

4.Passengercapacityofeachcarinamultiplecarconsistcanbeuptoasmanyas250passengers（standeesincluded）.

Tapescript:

1.Monorail

Monorailsystemsrelyonaverysimpletechnology:

rubber-tiredcarsridingonanarrowconcreteguide-way.Thecarsareselfpropelledbyelectricmotorswithpowerpickupviadistributionbarsmountedonthesideoftheguide-way.Monorailsystemsarecapableofspeedsof65milesperhourandofferridequalitycomparabletoconventionalrailtransittechnologies.

Monorailsystemsaresafebecausethedesignandnatureofmonorailsystemsmakeitverydifficultfortrespasserstoaccesstheguide-wayandpowerrails.

Monorailsystemsaremoreenvironmentallysensitivethananyotherelevatedtransittechnologyduetothemonorail'snarrowguide-waystructureandquietrubbertires.Also,sincemanyofthepylonandrailcomponentscanbeprefabricatedelsewhereandthenassembledalongtheroutes,thenoiseanddisruptionofconstructionwillbekepttoaminimum.Thus,noiseandneighborhooddisruptioncausedbymonorailconstructionaredramaticallylowerthanotherformsofmasstransit.

2.Maglev

Oneofthemostexitingrecentinnovationsinrailroadtechnologyismagneticlevitation,orMaglev,whichreliesontheprincipleofmagnetism-attractionandrepulsion.Thisnewtechnology,stillunderdevelopment,willresultintrainsthatarefaster,smoother,moreefficient,morecomfortable,andmoreenvironmentallysound.Nolongerwilltrainsrumbleheavilyalongsteelrails;rather,theywillfloatalongamagneticcushionwithoutanydirectcontactwiththeground.

3.LightRail

Lightrailtransitisanelectricrailwaysystem,constructedinthe1970sorlater,characterizedbyitsabilitytooperatesinglecarsormulti-cartrainsalongsharedorexclusiverights-of-wayatgroundlevel,onaerialstructures,insubways,oroccasionallyinstreets.Itisabletoboardanddischargepassengersatstationplatformsoratstreet,track,orcar-floorlevel,andisnormallypoweredbyoverheadelectricalwires.

Inmostcurrentsettings,lightrailisanythingbut"light"andisbuilttoexactingstandards.Themaximumspeedoflightrailtrainsisnormally60milesperhour（100kmperhour）,whileheavyrailtrainsnormallyoperateathigherspeeds.Dependinguponthespecificsystem