最近的雅思考试难度越来越大，真题是大家主要参考的内容，那么7月20号的考试是怎样的呢？今天就跟着出国留学网一起来看看2019年7月20日雅思阅读考试真题及答案。P1SolvinganArcticMystery
最近的雅思考试难度越来越大，真题是大家主要参考的内容，那么7月20号的考试是怎样的呢？今天就跟着出国留学网一起来看看2019年7月20日雅思阅读考试真题及答案。
P1SolvinganArcticMystery北极科考船（2014.10.25旧题）
文章主旨：对北极科考船失踪事件的调查。
包含判断7，填空6
参考答案：
判断1-4：
1.TRUE
2.NOTGIVEN
3.FALSE
4.FALSE
5.NOTGIVEN
6.FALSE
7.TRUE
填空8-13：
8.geology
9.sonar
10.manufactured
11.water
12.engines
13.stories
参考原文：
TORONTO（AP）-OneoftwoBritishexplorershipsthatdisappearedintheArcticmore160yearsagohasbeenfound，CanadianPrimeMinisterStephenHarperannouncedTuesday.TheHMSErebusandHMSTerrorwerelastseeninthelate1840s.Canadaannouncedin2008thatitwouldsearchfortheshipsledbyBritishArcticexplorerSirJohnFranklin.
Harper，speakinginOttawa，saiditremainsunclearwhichshiphasbeenfound，butimagesshowthere＇senoughinformationtoconfirmit＇soneofthepair.
Franklinand128hand-pickedofficersandmenvanishedonanexpeditionbegunin1845tofindthefabledNorthwestPassage.Franklin＇sdisappearancepromptedoneofhistory＇slargestandlongestrescuesearches，from1848to1859，whichresultedinthepassage＇sdiscovery.
TherouterunsfromtheAtlantictothePacificthroughtheArcticarchipelago.EuropeanexplorerssoughtthepassageasashorterroutetoAsia，butfounditrenderedinhospitablebyiceandweather.
＂ThisistrulyahistoricmomentforCanada，＂saidHarper，whowasbeaming，uncharacteristically.＂ThishasbeenagreatCanadianstoryandmysteryandthesubjectofscientists，historians，writersandsingerssoIthinkwereallyhaveanimportantdayinmappingthehistoryofourcountry.＂
Harper＇sgovernmentbegansearchingforFranklin＇sshipsasitlookedtoassertCanada＇ssovereigntyovertheNorthwestPassage，wheremeltingArcticicehasunlockedtheveryshippingrouteFranklinwasafter.
TheoriginalsearchfortheshipshelpedopenuppartsoftheCanadianArcticfordiscoverybackinthe1850s.HarpersaidtheshipwasfoundSundayusingaremotelyoperatedunderwatervehicle.ThediscoverycomesshortlyafterateamofarcheologistsfoundatinyfragmentfromtheFranklinexpedition.Searchersdiscoveredanironfittingthatoncehelpedsupportaboatfromoneofthedoomedexpedition＇sshipsintheKingWilliamIslandsearcharea.
Franklin＇svesselsareamongthemostsought-afterprizesinmarinearchaeology.HarpersaidthediscoverywouldshedlightonwhathappenedtoFranklin＇screw.
Tantalizingtraceshavebeenfoundovertheyears，includingthebodiesofthreecrewmendiscoveredinthe1980s.
ThebodiesoftwoEnglishseamen-JohnHartnell，25，andRoyalMarineWilliamBraine，33-wereexhumedin1986.Anexpeditionuncoveredtheperfectlypreservedremainsofapettyofficer，JohnTorrington，20，inanice-filledcoffinin1984.
Expertsbelievetheshipswerelostin1848aftertheybecamelockedintheicenearKingWilliamIslandandthatthecrewsabandonedtheminahopelessbidtoreachsafety.
ThesearchforanArcticpassagetoAsiafrustratedexplorersforcenturies，beginningwithJohnCabot＇svoyagein1497.Eventuallyitbecameclearthatapassagedidexist，butwastoofarnorthforpracticaluse.Cabot，theItalian-Britishexplorer，diedin1498whiletryingtofinditandtheshortcuteludedotherfamousexplorersincludingHenryHudsonandFrancisDrake.NoseacrossingwassuccessfuluntilRoaldAmundsenofNorwaycompletedhistripfrom1903-1906.
P2蜂王（英文标题待补充）
文章主旨：
待补充
参考答案：
待补充
参考原文：
待补充
P3NatureworksforNatureWorks?PLA新型塑料（2017.10.14旧题）
文章主旨：
对一种新型塑料的特性的介绍
参考答案：
判断27-30：
27.B
28.C
29.F
30.A
填空（流程图）31-34：
31.starch
32.fermentation
33.condensation
34.polymer
单选35-38：
35.B
36.C
37.A
38.D
单选39-40：
39.A
40.C
参考原文：
A
Adozenyearsago，scientistsatCargillgottheideaofconvertinglacticacidmadefromcornintoplasticwhileexaminingpossiblenewusesformaterialsproducedfromcornwetmillingprocesses.Inthepast，severaleffortshadbeenmadetodevelopplasticsfromlacticacid，butwithlimitedsuccess.Achievingthistechnologicalbreakthroughdidn’tcomeeasily，butintimetheeffortsdidsucceed.Afermentationanddistillationprocessusingcomwasdesignedtocreateapolymersuitableforabroadvarietyofapplications.
B
Asanagriculturalbasedfirm，Cargillhadtakenthisproductasfarasitcouldby1997.Thecompanyneededapartnerwithaccesstoplasticsmarketsandpolymerizationcapabilities，andbegandiscussionswithTheDowChemicalCompany.ThenextstepwastheformationofthejointventurethatcreatedCargillDowLLC.CargillDow’sproductistheworld’sfirstcommerciallyavailableplasticmadefromannuallyrenewableresourcessuchascom：NatureWorks?PLAisafamilyofpackagingpolymers（carbon-basedmolecules）madefromnon-petroleumbasedresources.Ingeoisafamilyofpolymersforfibersmadeinasimilarmanner.
C
Byapplyingtheiruniquetechnologytotheprocessingofnaturalplantsugars，CargillDowhascreatedamoreenvironmentallyfriendlymaterialthatreachestheconsumerinclothes，cups，packagingandotherproducts.WhileCargillDowisastand-alonebusiness，itcontinuestoleveragetheagriculturalprocessing，manufacturingandpolymerexpertiseofthetwoparentcompaniesinordertobringthebestpossibleproductstomarket.
D
ThebasicrawmaterialsforPLAarecarbondioxideandwater.Growingplants，likecomtakethesebuildingblocksfromtheatmosphereandthesoil.Theyarecombinedintheplanttomakecarbohydrates（sucroseandstarch）throughaprocessdrivenbyphotosynthesis.TheprocessformakingNatureWorksPLAbeginswhenarenewableresourcesuchascornismilled，separatingstarchfromtherawmaterial.Unrefineddextrose，inturn，isprocessedfromthestarch.
E
CargillDowturnstheunrefineddextroseintolacticacidusingafermentationprocesssimilartothatusedbybeerandwineproducers.Thisisthesamelacticacidthatisusedasafoodadditiveandisfoundinmuscletissueinthehumanbody.Throughaspecialcondensationprocess，alactideisformed.Thislactideispurifiedthroughvacuumdistillationandbecomesapolymer（thebaseforNatureWorksPLA）thatisreadyforusethroughasolvent-freemeltprocess.Developmentofthisnewtechnologyallowsthecompanyto“harvest”thecarbonthatlivingplantsremovefromtheairthroughphotosynthesis.Carbonisstoredinplantstarches，whichcanbebrokendownintonaturalplantsugars.ThecarbonandotherelementsinthesenaturalsugarsarethenusedtomakeNatureWorksPLA.
F
NatureWorksPLAfitsalldisposalsystemsandisfullycompostableincommercialcompostingfacilities.Withtheproperinfrastructure，productsmadefromthispolymercanberecycledbacktoamonomerandre-usedasapolymer.Thus，attheendofitslifecycle，aproductmadefromNatureWorksPLAcanbebrokendownintoitssimplestpartssothatnosignofitremains.
G
PLAisnowactivelycompetingwithtraditionalmaterialsinpackagingandfiberapplicationsthroughouttheworld；basedonthetechnology’ssuccessandpromise，CargillDowisquicklybecomingapremierplayerinthepolymersmarket.Thisnewpolymernowcompeteshead-onwithpetroleum-basedmaterialslikepolyester.Awiderangeofproductsthatvaryinmolecularweightandcrystallinitycanbeproduced，andtheblendofphysicalpropertiesofPLAmakesitsuitedforabroadrangeoffiberandpackagingapplications.Fiberandnon-wovenapplicationsincludeclothing，fiberfill，blanketsandwipes.Packagingapplicationsincludepackagingfilmsandfoodandbeveragecontainers.
H
AsNatureWorksPLApolymersaremoreoil-andgrease-resistantandprovideabetterflavorandaromabarrierthanexistingpetroleum-basedpolymers，groceryretailersareincreasinglyusingthispackagingfortheirfreshfoods.Ascompaniesbegintoexplorethisfamilyofpolymers，morepotentialapplicationsarebeingidentified.Forexample，PLApossesstwopropertiesthatareparticularlyusefulfordrapefabricsandwindowfurnishings.Theirresistancetoultravioletlightisparticularlyappealingasthisreducestheamountoffadinginsuchfabrics，andtheirrefractiveindexislow，whichmeansfabricsconstructedfromthesepolymerscanbemadewithdeepcolorswithoutrequiringlargeamountsofdye.Inaddition，sportswearmakershavebeendrawntotheproductasithasaninherentabilitytotakemoistureawayfromtheskinandwhenblendedwithcottonandwool，theresultisgarmentsthatarelighterandbetteratabsorbingmoisture.
I
PLAcombinesinexpensivelarge-scalefermentationwithchemicalprocessingtoproduceavalue-addedpolymerproductthatimprovestheenvironmentaswell.ThesourcematerialforPLAisanaturalsugarfoundinplantssuchascomandusingsuchrenewablefeedstockpresentsseveralenvironmentalbenefits.Asanalternativetotraditionalpetroleum-basedpolymers，theproductionofPLAuses20%-50%lessfossilfuelandreleasesaloweramountofgreenhousegassesthancomparablepetroleumbasedplastic；carbondioxideintheatmosphereisremovedwhenthefeedstockisgrownandisreturnedtotheearthwhenthepolymerisdegraded.Becausethecompanyisusingrawmaterialsthatcanberegeneratedyearafteryear，itisbothcostcompetitiveandenvironmentallyresponsible.
