专题限时检测(二十一)阅读理解之自然类(共3篇，限时23分钟)A(2014·武昌区高考适应性测试)Browncowsmaynotactuallymakechocolatemilk,butpinksilkworms(蚕)doproducepinksilk,ateamofscientistshasdiscovered.Toseeiftheycouldproducepredyedsilk—silkthatcomescolored,straightfromthesource—theteamfedordinarysilkwormsmulberry(桑树)leavesthathadbeensprayed(喷洒)withfabric(织物)dyes(染色剂).Outofseventesteddyes,onlyoneworked,producingathreadthatremindedmeofpinkdyedhair.Andyes,thewormsthemselvestakeonsomecolorbeforetheyproducesilk.Theircolorfuldietsdidnotaffecttheirgrowth,theteam,whichincludedengineersandbiologistsfromtheCSIR—NationalChemicalLaboratoryinIndia,reportsinthejournalACSSustainableChemistry&Engineering.(Theresearchersdidn’tlooktoodeeplyintohowthedyesaffectedthesilkworms’health.Afterall,silkwormsdiewhenpeopleharvesttheirsilk.)Theteammadedyeingsilkthiswaybecausecoloringfabricnormallyuseslargeamountsoffreshwater.Thewatergetspollutedwithdangerouschemicalsintheprocess,requiringcostlytreatmentbeforefactoriescansenditbackintowaterways.Dyeingsilkdirectlybyfeedingsilkwormswouldavoidthosewaterwashingsteps.Scientistsarejuststartingtostudythisidea.However,itremainstobeseenifit’scommerciallysuccessful.Inthisexperiment,theIndianteamtestedsevendyes,whicharecheapandpopularintheindustry.Thescientistsfounddifferentdyesmovedthroughsilkworms’bodiesdifferently.Somenevermadeitintotheworms’silkatall.Otherscoloredthewormsandtheirsilk,butthecolordisappearsbeforethesilkisturnedintofabric.Onlyonedye,named“directacidfastred”，showedupinthefinal,washedsilkthreads.Bythetimeitmadeitthere,itwasapleasant,lightpink.1．Thetextismostprobablya(n)________．A．sciencereportB．touristguideC．animalexperimentD．fashionadvertisement2．Silkwormscanproducepinksilkbecause________.A．theyarebornpinkB．theyaredyedpinkC．theygrowinpinkwaterD．theyarefeddyedfood3．Wherewastheexperimentcarriedout?A．InAmerica.B．InIndia.C．InIsrael.D．InChina.4．Howmanydyeshavebeenprovedsuccessfulintheexperiment?A．One.B．Three.C．Five.D．Seven.B(2014·武汉七校第一次联合考试)It’sthebeginningof2014,butasUSATodaysays，“it’snevertooearlytoplanyour2014travels”.Withsomanyhotdestinationsaroundtheglobe,“whereshouldIgo？”canbedifficulttoanswer.AccordingtoLonelyPlanet,though,Brazilisafinechoice—onOct29th,thetravelguidenamedthatcountrythetoponetovisitin2014.“Asifendlesscoastandmountainssplashed(飞溅)withrainforestdidn’talreadyadduptoanunfairshareofheaven,Brazilwillholdtwoofthegreatestsportingeventsintheworld,beginningwiththe2014FIFAWorldCupandfollowedbythe2016SummerOlympics，”explainedLonelyPlanet.Brazilisthelargestandmostpopulous(人口稠密的)countryinSouthAmerica.Itboasts(自豪拥有)theAmazon,theworld’slargestjungle,whichishometoavarietyofplantsandanimals.ButthegreatsceneryisnottheonlythingBrazilianstakepridein.ThecolorsgreenandyellowmightmakemostpeoplethinkofBrazil’ssoccerteamevenmorethanitsnationalflag.SoccerismorethanasportinBrazil;it’sawayoflife.Infact,theWorldCupbringsBrazilianstogether.ItisinterestingtonotethatthegeneralelectionsinBrazilareusuallyheldduringthesameyearastheWorldCup.Politicalpartiestrytotakeadvantageofthepatrioticenthusiasm(爱国热情)createdbysoccertoinspirepoliticalenergy.Alongsidesoccer,sambaisanothersymbolofBrazil.Thecountry’smosttraditionaldanceishighlightedeveryFebruaryattheRioCarnival,whichisoneoftheworld’sbi...
