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1温馨提示：此套题为Word版，请按住Ctrl,滑动鼠标滚轴，调节合适的观看比例，答案解析附后。关闭Word文档返回原板块。课时巩固提升 Plantscan’tcommunicatebymovingormakingsounds,asmostanimalsdo.Instead,plantsproducevolatilecompounds(挥发性化合物),chemicalsthateasilychangefromaliquidtoagas.Aflower’ssweetsmell,forexample,comesfromvolatilecompoundsthattheplantproducestoattractinsectssuchasbugsandbees.Nowscientistshavecreatedaquickwaytounderstandwhatplantsaresaying:achemicalsensor(传感器)calledanelectronicnose.The“e-nose”cantellcompoundsthatcropplantsmakewhenthey’reattacked.Scientistssaythee-nosecouldhelpquicklydetectwhetherplantsarebeingeatenbyinsects.Buttodaytheonlywaytodetectsuchinsectsistovisuallyinspect(检查)individualplants.Thisisachallengingtaskformanagersofgreenhouses,enclosedgardensthatcanhousethousandsofplants.Theresearchteamworkedwithane-nosethatrecognizesvolatilecompounds.Insidethedevice,13sensorschemicallyreactwithvolatilecompounds.Basedontheseinteractions,thee-nosegivesoffelectronicsignalsthatthescientistsanalyzeusingcomputersoftware.Totestthenose,theteampresenteditwithhealthyleavesfrom2cucumber,pepperandtomatoplants,allcommongreenhousecrops.Thenthescientistscollectedsamplesofairarounddamagedleavesfromeachtypeofcrop.Theseplantshadbeendamagedbyinsects,orbyscientistswhomadeholesintheleaveswithaholepunch(打孔器).Thee-nose,itturnsout,couldidentifyhealthycucumber,pepperandtomatoplantsbasedonthevolatilecompoundstheyproduce.Itcouldalsoidentifytomatoleavesthathadbeendamaged.Butevenmoreimpressive,thedevicecouldtellwhichtypeofdamage—byinsectsorwithaholepunch—hadbeendonetothetomatoleaves.Withsomefine-tuning,adevicelikethee-nosecouldonedaybeusedingreenhousestoquicklyspotharmfulbugs,theresearcherssay.【语篇概述】植物能相互交流吗?你知道它们的交流方式是怎样的吗?Ⅰ.Skimthepassageandfindthemainideaquickly.Thepassagemainlytellsusane-nose_______________________________________________________________________.答案：whichcantellustheirreactionswhencropplantsareattacked.Ⅱ.Readthepassageagainandchoosethebestanswers.1.Welearnfromthetextthatplantscommunicatewitheachotherby________.A.makingsomesounds3B.wavingtheirleavesC.producingsomechemicalsD.sendingoutelectronicsignals【解析】选C。细节理解题。从文章第一段中的“Instead,plantsproducevolatilecompounds,chemicalsthat...”可知,植物通过它本身所产生的挥发性化合物、化学物质来进行交流,所以答案选C。2.Whatdidthescientistsdotofindoutifthee-noseworked?A.Theypresenteditwithallcommoncrops.B.Theyfixed13sensorsinsidethedevice.C.Theycollecteddifferentdamagedleaves.D.Theymadetestsondamagedandhealthyleaves.【解析】选D。细节理解题。从文章倒数第三段可知,为了证实e-nose的效果,科学家们用受到伤害的叶子与健康的叶子来测试。3.Wecaninferfromthelastparagraphthatthee-nose________.A.isunabletotellthesmellofflowersB.isnotyetusedingreenhousesC.isdesignedbyscientistsatPurdueD.ishelpfulinkillingharmfulinsects【解析】选B。推理判断题。从文章最后一段中的“couldonedaybeusedingreenhousesto...”可知,e-nose还没有运用到greenhouses中,由此推断B是正确答案。关闭Word文档返回原板块4