高中英语阅读理解科技类三

高中英语阅读理解科技类三Imagine,oneday,gettingoutofbedinBeijingandbeingatyourofficeinShanghaiinonlyacoupleofhours,andthen,afterafulldayofwork，goingbackhometoBeijingandhavingdinnerthere.Soundsunusual,doesn'titButit'snotthatunrealistic,withthedevelopmentofChina,shigh一speedrailwaysystem.Andthat,snotall.Chinahasanevengreaterhigh——speedrailwayplan——toconnectthecountrywithSoutheastAsia,andeventuallyEasternEurope.Chinaisnegotiatingtoextenditsownhigh,-speedrailwaynetworktoupto17countriesin10to15years,eventuallyreachingLondonandSingapore.Chinahasproposedthreesuchprojects.ThefirstwouldpossiblyconnectKunmingwithSingaporeviaVietnamandMalaysia.AnothercouldstartinUrumqiandgothroughKazakhstanandUzbekistanandpossiblytoGermany.ThethirdwouldstartinthenortheastandgonorththroughRussiaandthenintoWesternEurope.IfChina,splanforthehigh-speedrailwaygoesforward,peoplecouldzipoverfromLondontoBeijinginundertwodays.ThenewsystemwouldstillfollowChina,shigh一speedrailwaystandard.Andthetrainswouldbeabletogo346kilometersanhour,almostasfastassomeairplanes.China,sbullettrain（高速客车），theoneconnectingWuhantoGuangzhou,alreadyhastheWorld,sfastestaveragespeed.Itcovers1,069kilometersinaboutthreehours.Ofcourse,therearesometechnicalchallengestoovercomeTherearesomanyissuesthatneedtobesettled,suchassafety,railgauge（轨星巨），maintenanceofrailwaytracks.So,it,simportanttopayattentiontoeverydetail.Butthekeyissueisreallymoney.Chinaisalreadyspendinghundredsofbillionsofyuanondomesticrailwayexpansion.Chinaprefersthattheothercountriespayinnaturalresourcesratherthanwithcapitalinvestment.ResourcesfromthosecountriescouldstreamintoChinatosustaindevelopment.It,11beawin-winproject.Forothercountries,therailwaynetworkwilldefinitelycreatemoreopportunitiesforbusiness,tourismandsoon,nottomentionthebettercommunicationamongthosecountries.ForChina,suchaprojectwouldnotonlyconnectitwiththerestofAsiaandbringsomemuch-neededresources,butwouldalsohelpdevelopChina,sfarwest.Weforeseethatinthecomingdecadesmillionsofpeoplewillmigratetothewesternregions,wherethelandisemptyandresourcesunused.Withhigh-speedtrains,peoplewillsetupfactoriesandbusinesscentersinthewestonceandforal1Andthey,11tradewithCentralAsianandEasternEuropeancountries.67.China,snewhigh-speedrailwayplanwillbeawin-winprojectbecause.A.Chinawillgetmuch-neededresourcesanddevelopitswesternregionsChinaandthecountriesinvolvedwillbenefitfromtheprojectinvariouswaysC.ChinawilldevelopitsrailwaysystemandcommunicationwithothercountriesD.theforeigncountriesinvolvedwilldeveloptheirrailwaytransportation,businessandtourismAccordingtothepassage,thegreatestchallengetothenewhigh-speedrailwayplanis.A.technicalissuesB.safetyofthesystemfinancialproblemsD.maintenanceofrailwaytracks69.Whichofthefollowingwordsbestdescribestheauthor,sattitudetowardsChina,shigh-speedrailwayplanA.Critical.B.Reserved.C.DoubtfulD.Positive.70.WhichofthefollowingmightbethebesttitleforthepassageA.NewRailwayStandardsB.BigRailwayDreamsC.High——speedBulletTrainsD.InternationalRailwayNetworkBHaveyouevernoticedthecolorofthewaterinariverorstreamafteraheavyrainfallWhatdoyouthinkcausedthischangeincolorItissoilthathasbeenwashedintotheriverfromtheriverbankorfromthenearbyfields.ComponentsofSoftSoilismadeupofanumberoflayers（层），eachhavingitsowndistinctivecolorandtexture.Theupperlayerisknownasthelitter.Itactslikeablanket,limitingtemperaturechangesandreducingwaterloss.Thetopsoillayerismadeupofsmallparticlesofrockmixedwithrottenplantandanimalmattercalled卜”印”5（腐殖质），whichisblackandgivesthetopsoilitsdarkcolor.Thislayerisusuallyrichinnutrients,oxygen,andwater.Belowthetopsoilisthesubsoil,alayerthatcontainsmorestonesmixedwithonlysmallamountsoforganicmatter.Thislayerislighterincolourbecauseofthelackofhumus.Beneaththesoilliesalayerofbedrock.Soilformsfromthebottomup.Overtimebedrockisattackedbyrain,wind,frost,andsnow.Itisgraduallybrokendownintosmallerparticlesinaprocesscalledweathering.Plantsbegintogrow,androttenmaterialsenrichthetopsoil.MostofthesoilinEasternCanada,forexample,wasformedfromweatheredrockthatwasexposedwhentheicedisappearedl2,000yearsago.WaterBeneaththeSoilSurfacewatercollectsandflowsabovethegroundinlakes,ponds,andrivers.Onceinthesoilorrock,itiscalledgroundwater.Gravitypullsgroundwaterthroughthesoilinaprocesscalledpercolation渗透）.Eventuallythewaterreachesalayercalledthewatertable.Underthisisbedrockthroughwhichwatercannotpercolate.Aswaterpercolatesdownward,itdissolvesorganicmatterandmineralsfromthesoilandcarriesthemtodeeperlayers.Thiscausesaseriousproblembecauseplantsrequirethesenutrientsforgrowth.SoilpHSoilcanbeacidic,neutral,orbasic.ThepHofthesoilisdeterminedbythenatureoftherockfromwhichitwasformed,andbythenatureoftheplantsthatgrowandrotinit.TheacidityofrainandsnowcanlowerthepHofthegroundwaterthatentersthesoil.Byburningfossilfuelssuchascoal,oilandgasoline,humanshavebeencontributingtohigherlevelsofacidityinmanysoils.Whenfossilfuelsareburned,gasesarereleasedintotheairandthenfallbacktoearthasacidrainAcidsoilincreasestheproblemofcarryingnutrientstolowersoillevelsAsnutrientsareremoved,soilislessfertilePlantsgrowmoreslowlyinacidicsoi,landalsobecomeeasilyattackedbydiseases.Thelayerofsoilthatprovidesnecessarynutrientsforplantgrowthiscalled.A.litterB.topsoilC.humusD.subsoilAccordingtothetext.whichofthefollowingisNOTtrueA.Soilformsfromweatheredrockontheearthsurface.B.Thedeep