最新StepByStep英语听力入门3册答案.docx

最新StepByStep英语听力入门3册答案.docx

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最新StepByStep英语听力入门3册答案

StepByStep2000Book3Unit01

Unit1WorldNewsUpinSpace

PartIWarmingup

1.EndeavorhasdockedwiththeISS.Whatfor?

Toprovideelectricityforscienceexperiments

WhenwilltheU.S.laboratoryarrive?

Nextmonth

2.WhatdoesISShavenow?

Alivingroomandacommandcenter

3.WhathasbeendeclaredbyNASA?

Pathfinder's30-daymissiononMarsisa100percentsuccess.

4.WhohasgivenupitshopeofrevivingPathfinder?

NASA

WhendidPathfindermakeitslasttransmissionofscientificdatafromMars?

AttheendofSeptember,83daysafteritslanding

5.WhyisGalileoheadingforanotherpassbyJupiter'smoonIOonThursday?

Togetacloserlookatthemostvolcanicbodyinsolarsystem

6.WhatisthedauntingtaskforthecrewofAtlantis?

TodeliverNASA's$1.4billionspacelabDestinytotheInternationalSpaceStation

7.WhatisthepurposeoftheexperimentsconductedbyastronautsonColumbia?

Toconfirmatheorythatparticlesinspacetendtoattracteachotherandformdustclouds

8.WhatisEndeavorpreparingtodoonMonday?

ToreturnhomeattheKennedySpaceCenteraftercompletingrepairsontheHubbleTelescope

9.WhyhasColumbiareturnedtoEarthafteranabbreviatedstayinspace?

Becauseofamechanicalproblem

10.WhatisDiscoverydoingnow?

Anditscrew?

DiscoveryisplayingchasewiththeHubbleTelescopenow.

Itscrewissettinguphousekeepingandrecoveringfromtheeffectsofweightlessness.

Tapescript:

1.U.S.spaceshuttleEndeavorhasdockedwiththeInternationalSpaceStation,bearingagiftofenergy.Thefive-manshuttleteamarrivedtoaddasetofgiantsolarpowerpanelstoUnitytoprovideelectricityforscienceexperimentsthatwillbeginsoonaftertheU.S.laboratoryarrivesnextmonth.

2.TheInternationalSpaceStationfinallyhasalivingroomandacommandcenter.TheRussianZvezdamoduledockedearliertodaywiththefledglingoutpost,whichisbeingassembledinspace.Afteracheckoutperiod,itwillbereadyforthefirstcrewtoliveinlaterthisyear.

3.TheU.S.SpaceAgencyNASAhasdeclareditsPathfinderspacecraftmissiontoMarsa100percentsuccess.ThisweekthePathfindercompletedits30-dayplannedmissiononMars.AU.S.spaceofficialsaysthisspacecrafthasfulfilledallitsobjectives.

4.TheUnitedStatesSpaceAgencyNASAsaysit'sgivenupanyrealhopeofrevivingitsspaceprobeonMars.ThespacecraftPathfindermadeitslasttransmissionofscientificdatafromthesurfaceofMarsattheendofSeptember,83daysafterlanding.

5.TheU.S.GalileospacecraftisheadingforanotherpassbyJupiter'sfierymoonIOThursdaytogetacloserlookatthemostvolcanicbodyinoursolarsystem.Apassjust600kilometersawaylastmonthhasprovidedabetterunderstandingofjusthowactiveitis.

6.Itcouldbeamission-impossible-typeassignmentforthecrewofthespaceshuttleAtlantis.They'vegotthedauntingtaskofdeliveringNASA's$1.4billionspacelabDestinytotheInternationalSpaceStation.Iftheypullitoff,the15-tonlabwillputNASA'sflightcontrollersincharge.UntilnowRussiancontrollershavedirectedoperationsatthestation.

7.AstronautsontheU.S.spaceshuttleColumbiahaveconductedexperimentstoconfirmatheorythatparticlesinspacetendtoattracteachotherandformdustclouds.

8.TheU.S.spaceshuttleEndeavorispreparingtoreturnhomeintriumphaftercompletingrepairsontheHubbleTelescope.TheEndeavor'sscheduledtolandMondayattheKennedySpaceCenteronFlorida'sAtlanticcoast,returningtothesitewherethemissionbeganelevendaysago.

9.TheU.S.spaceshuttleColumbiahasreturnedtoEarthafteranabbreviatedstayinspacebecauseofamechanicalproblem.TheSpaceAgencyorderedtheshuttlebacktoEarthafteroneofthethreepowergeneratorsfailedSunday.Thegeneratorscalled"fuelcells"provideallofshuttle'selectricalpower,andNASAsafetyrulesrequirethespaceshiptoreturntoEarthifanyfuelcellfails.

10.DiscoveryisplayingchasewiththeHubbleSpaceTelescoperightnow.Theshuttlelaunchwasnearlyperfectaccordingtomissionmanagers,andthecrewofsevenastronautsissettinguphousekeepingandrecoveringfromtheeffectsofweightlessness.

PartIINewsreports

Event:

NASA's12-yearprogramofMars

--Startingtime:

1996

--Finishingtime:

2008

Firstinstallment:

nNamesofspacecraft:

theMarsGlobalSurveyorOrbiter/thePathfinderLander

Arrivaltime:

1997

Mission:

Tocollectandanalyzerocks

Secondinstallment:

--Namesofspacecraft:

thePolarLander/theMarsClimateOrbiter

Launchtime:

December

Arrivaltime:

NextDecember

Mission:

a.Toinspectforsubsurfacewater

b.Tomeasurethedistributionofwatervapor,dustandcondensates

Grandfinale:

--Launchtime:

2005

--Returntime:

2008

--Mission:

ToreturnsoilandrocksamplestoEarth

Tapescript:

OfalltheU.S.andRussianspacecraftthathavetraveledtoMarssincethe1960s,thePolarLanderistobethefirsttotouchdownneartheplanet'ssouthpole.TheLanderandacompanionorbitingcraftcalledtheMarsClimateOrbiter,launchedinDecember,arethesecondinstallmentofa12-yearNASAprogram（beganin1996）tounlockthesecretsofEarth'sredneighbor.

ThefirstinstallmenttheMarsGlobalSurveyorOrbiterandthePathfinderLander--arrivedin1997,withPathfinder'sroboticrovercollectingandanalyzingrocksonadesertabouthalfaworldawayfromthepolarlandingsite.

TheLanderistotouchdownjustabovethenorthern-mostedgeofthesouthpolaricecap,believedtobeamixtureofwaterandcarbondioxide.

Itwilluseretrorocketstoslowitsdescent.Onceonthegrounditwillemployaroboticarmresemblingachild'stoyconstructionshoveltodiginsearchofsubsurfacewater.TogetherwiththenewestorbiternowonitswaytoMars,theLanderwillalsomeasurethedistributionofwatervapor,dustandcondensatesintheMartianatmosphere.

WhilethePolarLanderdescendsnextDecember,itistoreleasetwospeedingprobes,eachsmallerthanabasketball.Theseruggedinstrumentsaretocrashatabout640kilometersperhourandburythemselvesintotheMartiansurfaceabout100kilometersawayfromtheLander'stouch-downpoint.They,too,willbeinspectingforsubsurfacewater.

ThegrandfinaleofthisseriesofMarsprobesistentativelysetforlaunchin2005.ItwouldreturnsoilandrocksamplestoEarththreeyearslater.

Summary:

Thisnewsreporttellsusthatanailingobservatory,theComptonGammaRayObservatory,hasbeenforcedtofallfromitsorbitandcrashintoaremoteareainthePacificOceantoavoiddeathsandinjuriesfromthefallingdebris.

Answerstothequestions:

1.9years

2.16metrictons

3.6tons

4.About4,000kilometerssoutheastofHawaii

5.4,100kilometerslongand26kilometerswide

6.BecauseoneofitsthreestabilizinggyroscopeshadfailedinDecember

7.Itchangedastronomers'viewoftheheavensaftershowingthattheentireuniverseisbathedintheinvisiblegammarays.

Tapescript.

SpaceAgencyNASAforcedanailingobservatorytofallfromorbitandcrashintothePacificOceanonSunday.NASAengineerspickedaremotespottoavoiddeathsandinjuriesfromthefallingdebris.

NASAsaystheComptonGammaRayObservatoryhasmadeafieryplungethroughtheatmosphereintoanisolatedareaofthePacific.

Mostofthenine-year-oldsatellitewastohaveburnedupinthedive,butaboutsixtonsofhotmetalwereexpectedtohaveshoweredontoanisolatedareaaboutfourthousandkilometerssoutheastofHawaii.NASAhadestimatedthatthedebriswouldscatteroveralong,narrowpath41hundredkilometerslongand26kilometerswide.

ThedeliberatecrashcameafterGoddardSpaceFlightCentertechniciansdirectedtheobservatoryearlySundaytofireitsthrusterstwicetodiveintotheatmosphere.

NASAfeltthiswasnecessarybecauseoneoftheCompton'sthreestabilizinggyroscopeshadfailedinDecember.TheSpaceAgencydecidedtobringthe16-metric-tonsatellitebacknowinacontrolledmannertopreventpossiblefurthersystemfailuresfromcausingittodroponapopulatedarea.TheCompton'spathtookitovermanypopulatedareas,includingMexicoCity,Bangkok,andMiami.

Comptonexceededitsoriginalfive-yearmissionbyfouryears,resultinginabouttwothousandscientificpapers.

Theobservatorychangedastronomers'viewoftheheavensaftershowingthattheentireuniverseisbathedintheinvisiblegammarays,thehighestenergyformoflight.Itdiscoveredhundredsofpreviouslyunknownsourcesofgammarays,somestreamingfromblackholes,explodingstars,andthesun.

Questions:

1.HowoldistheCompton?

2.HowheavyistheCompton?

3.HowmanytonsofhotmetalwereexpectedtoplungeintothePacific?

4.WhatistheplacethathasbeenchosenforthecrashoftheCompton?

5.HowbigisthepaththatthedebrisoftheComptonwouldscatterover?

6.WhyisitnecessarytoforcetheComptontofallfromitsorbit?

7.What'sthesignificanceoftheCompton?

C.

Summary:

ThisnewsreporttellsusthatorganicmoleculeshavebeendetectedonthemoonsoftheplanetJupiterandsomeformoflifemighthaveevolvedthere.

MoonsofJupiterFindings

Ganymede

Wrinkledsurfacepockmarkedwithimpactsfromasteroidsandcomets

Ganymede&Callisto

--Chemicalsignalsshowingthereareorganicmoleculescontainingcarbonandnitrogen

--Evidenceofwaterice

EuropaDeepoceans

Tapescript.

AstronomersintheUnitedStatessaytheyhavedetectedorganicmoleculesonthemoonsoftheplanetJupiterwhichcouldindicatetheconditionsarerightthereforsomeformoflifetohaveevolved.AfterstudyingthelatestfindingssentbackbythespaceprobeGalileo,