Ifthedrugproveseffectiveinhumantrials,itcouldenhancetheeffectivenessofexistingAIDSdrugsin________.
fighting drug-resistant strains of the virus
暂无解析
PartIVTranslation
Bymeasuringandchartingtheresultsofmanyexperiments,theyaretryingtofindoutwhatmakesdifferentpeopleperceivetotallydifferentthingsaboutthesamescene.(PassageOne)
Whichissafer-stayingathome,travelingtoworkonpublictransport,orworkingintheoffice?Surprisingly,eachofthesecarriesthesamerisk,whichisverylow.However,whataboutflyingcomparedtoworkinginthechemicalindustry?Unfortunately,theformeris65timesriskierthanthelatter!Infact,theaccidentrateofworkersinthechemicalindustryislessthanthatofalmostanyofhumanactivity,andalmostassafeasstayingathome.
Thetroublewiththechemicalindustryisthatwhenthingsgowrongtheyoftencausedeathtothoselivingnearby.Itisthiswhichmakeschemicalaccidentssonewsworthy.Fortunately,theyareextremelyrare.ThemostfamousoneshappenedatTexasCity(1947),Flixborough(1974),Seveso(1976),Pemex(1984)andBhopal(1984)。
Someofthesearealwaysinthemindsofthepeopleeventhoughthelossoflifewassmall.NoonediedatSeveso,andonly28workersatFlixborough.TheworstaccidentofallwasBhopal,whereupto3,000werekilled.TheTexasCityexplosionoffertilizerkilled552.ThePemexfireatastorageplantfornaturalgasinthesuburbsofMexicoCitytook542lives,justamonthbeforetheunfortunateeventatBhopal.
Someexpertshavediscussedtheseaccidentsandusedeachaccidenttoillustrateaparticulardanger.ThustheTexasCityexplosionwascausedbytonsofammoniumnitrate(硝酸铵),whichissafeunlessstoredingreatquantity.TheFlixboroughfireballwasthefaultofmanagement,whichtookriskstokeepproductiongoingduringessentialrepairs.TheSevesoaccidentshowswhathappensifthelocalauthoritieslackknowledgeofthedangerontheirdoorstep.Whenthepoisonousgasdriftedoverthetown,localleaderswereincapableoftakingeffectiveaction.ThePemexfirewasmadeworsebyanoverloadedsiteinanovercrowdedsuburb.Thefiresetoffachainreactionosexplodingstoragetanks.Yet,byamiracle,thetwolargesttanksdidnotexplode.Hadthesecaughtfire,then3,000strongrescueteamandfirefighterswouldallhavedied.
1.Chemicalaccidentsareusuallyimportantenoughtobereportedasnewsbecause____.
A.theyareveryrare
B.theyoftencauselossoflife
C.theyalwaysoccurinbigcities
D.theyarousetheinterestofallthereaders
2.Whichofthefollowingstatementsistrue?
A.Workingattheofficeissaferthanstayingathome.
B.Traverllingtoworkonpublictransportissaferthanworkingattheoffice.
C.Stayingathomeissaferthanworkinginthechemicalindustry.
D.Workinginthechemicalindustryissaferthantravelingbyair.
3.Accordingtopassage,thechemicalaccidentthatcausedbythefaultofmanagementhappenedat____.
A.TexascityB.FlixboroughC.SevesoD.MexicoCity
4.Fromthediscussionamongsomeexpertswemaycocludethat____.
A.toavoidanyaccidentsweshouldnotrepairthefacilitiesinchemicalindustry
B.thelocalauthoritiesshouldnotbeconcernedwiththeproductionofthechemicalindustry
C.alltheseaccidentscouldhavebeenavoidedorcontrolledifeffectivemeasurehadbeentaken
D.naturalgasstoredinverylargetanksisalwayssafe
5.Fromthepassageweknowthatammoniumnitrateisakindof____.
A.naturalgas,whichcaneasilycatchfire
B.fertilizer,whichcan'tbestoredinagreatquantity
C.poisonoussubstance,whichcan'tbeusedinovercrowdedareas
D.fuel,whichisstoredinlargetanks
InwhatwaydoesLauraLenox-Conynghammakeherliving?
ThediscoveryoftheAntarcticnotonlyprovedoneofthemostinterestingofallgeographicaladventures,butcreatedwhatmightbecalled“theheroicageofAntarcticexploration”.Bytheirtremendousheroism,mensuchasShakleton,Scott,andAmundsencausedanewcontinenttoemergefromtheshadows,andyetthatheroicage,littlemorethanacenturyold,isalreadypassing.Modernscienceandinventionsarerevolutionizingtheendurance,futurejourneysintotheseicywasteswillprobablydependonmotorvehiclesequippedwithcaterpillartractionratherthanonthedogsthatearlierdiscoverersfoundsoinvaluableandhardlycomparable.
FewrealizethatthisAntarcticcontinentisalmostequalinsizetoSouthAmerica,andenormousfieldofworkawaitsgeographersandprospectors.Thecoastsofthiscontinentremaintobeaccuratelycharted,andthemapingofthewholeoftheinteriorpresentsaformidabletasktothecartographerswhoundertakethework.Oncetheirlaborsarecompleted,itwillbepossibletoprospectthevastnaturalresourceswhichscientistsbelievewillfurnishoneofthelargesttreasurehoardsofmetalsandmineralstheworldhasyetknown,andalmostinexhaustiblesourcesofcopper,coal,uranium,andmanyotheroreswillbecomeavailabletoman.SuchdiscoverieswillusherinaneraofpracticalexploitationoftheAntarcticwastes.
Thepolardarknesswhichhidesthiscontinentforthesixwintermonthswillbedefeatedbyhugebatteriesoflight,andmakepossibletheestablishingofair-fieldsforthefutureinter-continentalairservicesbymakingtheseareasaslightasday.Presentflyingrouteswillbecompletelychanged,fortheAntarcticrefuelingbaseswillmakeflightsfromAustraliatoSouthAmericacomparativelyeasyoverthe5,000milesjourney.
Theclimateisnotlikelytoofferaninsuperableproblem,fortheexplorerAdmiralByrdhasshownthattheclimateispossibleevenformencompletelyuntrainedforexpeditionsintothosefrozenwastes.Someofhispartiesweremenwhohadneverseensnowbefore,andyetherecordsthattheysurvivedtherigorsoftheAntarcticclimatecomfortably,sothat,providedthattheappropriateinstallationsaremade,wemayassumethathumanbeingsfromallcountriescouldlivetheresafely.Byrdevenaffirmsthatitisprobablythemosthealthyclimateintheworld,fortheintensecoldofthousandsofyearshassterilizethiscontinent,andrendereditabsolutelygermfree,withtheconsequencesthatordinaryandextraordinarysicknessanddiseasesfromwhichmansuffersinotherzoneswithdifferentclimatesarehereutterlyunknown.Thereexistnoproblemsofconservationandpreservationoffoodsupplies,forthelatterkeepindefinitelywithoutanysignsofdeterioration;itmayevenbethatlatergenerationswillcometoregardtheAntarcticasthenaturalstorehouseforthewholeworld.
Plansarealreadyonfoottosetuppermanentbasesontheshoresofthiscontinent,andwhatsofewyearsagowasregardedasa“deadcontinent”nowpromisestobeamostactivecenterofhumanlifeandendeavor.
1.WhendidmanbegintoexploretheAntarctic?
A.About100yearsago.
B.Inthiscentury.
C.Atthebeginningofthe19thcentury.
D.In1798.
2.Whatmusttheexplorersbe,eventhoughtheyhavemodernequipmentandtechniques?
A.Braveandtough
B.Stubbornandarrogant.
C.Well-likedandhumorous.
D.Stoutandsmart.
3.Themosthealthyclimateintheworldis___.
A.inSouthAmerica.
B.intheArcticRegion.
C.intheAntarcticContinent.
D.intheAtlanticOcean.
4.WhatkindofmetalsandmineralscanwefindintheAntarctic?
A.Magnetite,coalandores.
B.Copper,coalanduranium.
C.Silver,naturalgasanduranium.
D.Aluminum,copperandnaturalgas.
5.Whatisplannedforthecontinent?
A.Buildingdamsalongthecoasts.
B.Settingupseveralsummerresortsalongthecoasts.
C.Mappingthecoastandwholeterritory.
D.Settinguppermanentbasesonthecoasts.
Directions:
Inthissection,youwillheartwopassages.Attheendofeachpassage,youwillhearsomequestions.Boththepassageandthequestionsmwillbespokenonlyonce.Afteryouhearaquestion,youmustchoosethebestanswerfromthefourchoicesmarkedA,B,CandD.ThenmarkthecorrespondingletterontheAnswerSheetwithasinglelinethroughthecentre.PassageOneQuestions9to12arebasedonthepassageyouhavejustheard.
9、A.Sheescapedunhurt.
B.Shewitnessedtheshooting.
C.Shewasshottodeath.
D.Shewas15yearsold.
10、A.5.B.7.C.11.D.12.
11、A.Spear'sdigitalcamera.
B.Onesuspect'sgun.
C.Thequeen'svideo.
D.Berry'spurse.
12、A.Civiliansshouldkeepawayfromthebusinesszone.
B.Everybodyshouldthinkabouthowtofightagainstcrimes.
C.Governmentshouldscheduletonegotiatewithterrorists.
D.Peopleshouldemigratebecauseofdomestichighcrimerate.PassageTwo
Questions13to15arebasedonthepassageyouhavejustheard.
13、A.Increasingsalaries.
B.Surgingenergyproduction.
C.Boominghousingmarket.
D.Risinginterestrates.
14、A.Increasinginterestrate.
B.Decreasingfinancialproducts.
C.Buyingsubstantialsecurities.
D.Expandingfinancialbusiness.
15、A.Frackingcaninfluencetheburningoffossilfuels.
B.Theuseoffrackingwilldoharmtoenvironment.
C.Frackingtechnologyisasafepracticeinindustry.
D.Theuseoffrackingisbeneficialtopeople'shealth.