小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com选择性必修第一册Unit1PeopleofAchievementⅠ.阅读理解ABanffNationalParkishometoanamazingwildlifepopulation.ButthebusyTransCanadaHighwaythatcutsthroughtheparkisahazardtothelovelyanimals.Toaddresstheproblem，Banfffirstputupwildlifefencingoneithersideofthehighwaytodiscourageanimalsfromenteringthebusyroad.Then，since1996，sixwildlifeoverpassesand38underpasseshavebeenopenedtohelptheanimalscrossthehighwayinsafety.IwasfortunatetovisitBanff’sRedEarthOverpasswithTrevorKinley，theprojectmanagerofParksCanada.Hetoldmethatsofar，theyhaddocumented10,000safeanimalcrossingsonthisoverpassalone.“Someanimalshavelearnedhowtousethecrossingsmuchmorequicklythanothers.Blackbearsarethefastestlearners，followedbydeer.Wolvesandlionstakethelongesttoworkouthowtousethem，”Kinleysaid，laughing.“Butthoseanimalsthatareslowertoadaptareusuallymorecapableanddeterminedtofigureoutthesafestwaytocrossthoseoverpassesandunderpasses.”Thereissomecriticism(批评)thatchannelingsomuchwildlifeintoafewbridgesandtunnelsislikemakingatrapfortheanimals，offeringbiganimalsaneasymealoneitherside.“Butresearchhasshownthatthisisnotthecase，”Kinleyassuredme.“Therearenomorekillingsaroundthecrossingsthananywhereelseinthepark.”WalkingovertheTransCanadaHighwayandthenwalkingunderneaththroughoneofthetunnels，Iwasamazedtoseethefreshtracksofblackbears，wolves，deerandmanykindsofsmalleranimals.Somehow，Iwassohappytoseealltheseanimalfootprints，knowingthatallthiswildlifewaspassingsafelyunderandoverthelongestroadinCanada.Hopefully，thesuccessofthewildlifecrossingsinBanffwillcontinuetoinspiresimilarsolutionsaroundtheworld，wherehumanpressureonwildlifecontinuestogrow.1．Whichofthefollowingbestexplainstheunderlined“hazard”inparagraph1?A．Shelter.B．Message.C．Answer.D．Danger.2．WhatdoesTrevorKinleysayaboutthosewolvesandlions?A．Theyarestupidanimals.B．Theyarecautiouslearners.C．Theyareverydangerous.D．Theyaregoodatadapting.小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com3．Whatarethecriticsworriedabout?A．Therearetoomanybridgesandtunnels.B．Manyanimalswillnotusethecrossings.C．Morekillingsmighthappenatthecrossings.D．Illegalhuntingmightbeencouragedinthepark.4．Howdoestheauthorfeelattheendofthevisit?A．Concerned.B．Disappointed.C．Shocked.D．Delighted.BPlantsdon’thaveearsoracentralnervoussystem，butnewresearchoutoftheUniversityofMissourihasdemonstratedthattheymightstillhavetheabilityto“hear”．Morespecifically，plantshavebeenshowntoexhibitanimmuneresponsetothemeresoundofahungryinsect.Forthestudy，researchersplayedthesoundofacaterpillarchewingtoagroupofplants，whichcausedslightvibrations(振动)ontheplants’leaves.Theplantswereabletorecognizethesevibrationpatternsasdanger，andrespondedbymountingtheappropriateimmuneresponse.Inotherwords，itappearsthatplantscan“hear”themselvesbeingchewedon.Researchersassumethatplantsachievethisremarkableabilitythankstoproteinsthatrespondtopressurefoundwithintheircellmembranes.Vibrationscausepressurechangeswithinthecell，whichcanchangethebehavioroftheproteins；however，additionalstudywillberequiredtoconfirmordenythistheory.Onceresearchersidentifytheexactmechanismsatplayinthisprocess，itcouldleadtoadvancesincropprotection.Farmerscouldpotenti...