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1、备战2018年高考英语大题冲关秘笈专题07冲关真题训练题组一Passage1(2017·新课标II卷，D)话题词数难度参考用时正确率植物受到攻击时，会发出VOCs，以此来保护自己293★★★☆☆5分钟Whenaleafyplantisunderattack,itdoesn’tsitquietly.Backin1983,twoscientists,JackSchultzandIanBaldwin,reportedthatyoungmapletreesgettingbittenbyinsectssendoutaparticularsmellthatneighboringplan
2、tscanget.Thesechemicalscomefromtheinjuredpartsoftheplantandseemtobeanalarm.Whattheplantspumpthroughtheairisamixtureofchemicalsknownasvolatileorganiccompounds,VOCsforshort.ScientistshavefoundthatallkindsofplantsgiveoutVOCswhenbeingattacked.It’saplant’swayofcryingout.Butisanyonelistening?App
3、arently.Becausewecanwatchtheneighboursreact.Someplantspumpoutsmellychemicalstokeepinsectsaway.Butothersdodoubleduty.Theypumpoutperfumesdesignedtoattractdifferentinsectswhoarenaturalenemiestotheattackers.Oncetheyarrive,thetablesareturned.Theattackerwhowaslunchingnowbecomeslunch.Instudyafter
4、study,itappearsthatthesechemicalconversationshelptheneighbors.Thedamageisusuallymoreseriousonthefirstplant,buttheneighbors,relativelyspeaking,staysaferbecausetheyheardthealarmandknewwhattodo.Doesthismeanthatplantstalktoeachother?Scientistsdon’tknow.Maybethefirstplantjustmadeacryofpainorwas
5、sendingamessagetoitsownbranches,andso,ineffect,wastalkingtoitself.Perhapstheneighborsjusthappenedto“overhear”thecry.Soinformationwasexchanged,butitwasn’tatrue,intentionalbackandforth.Charles Darwin, over 150 years ago, imagined a world far busier, noisier and more intimate(亲密的) than the wo
6、rld we can see and hear. Our senses are weak. There’s a whole lot going on.32. What does a plant do when it is under attack?A. It makes noises. B. It gets help from other plants.C. It stands quietly D. It sends out certain chemicals.33. What does the author mean by “the tables are t
7、urned” in paragraph 3?A. The attackers get attacked.B. The insects gather under the table.C. The plants get ready to fight back.D. The perfumes attract natural enemies.34.Scientistsfindfromtheirstudiesthatplantscan.A.predictnaturaldisastersB.protectthemselvesa
