搜题，就来5TiKU.com题库【问题】 We'veknownforyearsthatplantscansee，hear，smellandcommunicatewithchemicals.Now，reportedNewScientist，theyhavebeenrecordedmakingsoundswhenstressed. Inayet-to-be-publishedstudy，ItzhakKhaitandhisteamatTelAvivUniversity，inIsrael，foundthattomatoandtobaccoplantsca
We'veknownforyearsthatplantscansee，hear，smellandcommunicatewithchemicals.Now，reportedNewScientist，theyhavebeenrecordedmakingsoundswhenstressed. Inayet-to-be-publishedstudy，ItzhakKhaitandhisteamatTelAvivUniversity，inIsrael，foundthattomatoandtobaccoplantscanmakeultrasonic（超声的）noises.Theplants"cryout"duetolackofwater，orwhentheirstems（茎）arecut.It'sjusttoohigh-pitchedforhumanstohear. Microphonesplaced10centimetersawayfromtheplantspickedupsoundsintheultrasonicrangeof20to100kilohertz.Humanhearingusuallyrangesfrom20hertzto20kilohertz."Thesefindingscanchangethewaywethinkabouttheplantkingdom，"theywrote. Onaverage，"thirsty"tomatoplantsmade35soundsanhour，whiletobaccoplantsmade11.Whenplantstemswerecut，tomatoplantsmadeanaverageof25soundsinthefollowinghour，andtobaccoplants15.Unstressedplantsproducedfewerthanonesoundperhour，onaverage. Perhapsmostinterestingly，differenttypesofstressledtodifferentsounds.Theresearcherstrainedamachine-learningmodeltoseparatetheplants'soundsfromthoseofthewind，rainandothernoisesofthegreenhouse.Inmostcases，itcorrectlyidentifiedwhetherthestresswascausedbydrynessoracut，basedonasound'sintensityandfrequency.Water-hungrytobaccoappearstomakeloudersoundsthancuttobacco，forexample.AlthoughKhaitandhiscolleaguesonlylookedattomatoandtobaccoplants，theythinkotherplantsalsomakesoundswhenstressed. Iffarmerscouldhearthesesounds，saidtheteam，theycouldgivewatertotheplantsthatneeditmost.Asclimatechangecausesmoredroughts，theysaidthiswouldbeimportantinformationforfarmers."Thesoundsthatdrought-stressedplantsmakecouldbeusedinprecisionagriculture，"saidAnneVisscherattheRoyalBotanicGardens，Kew，intheUK. Khait'sreportalsosuggeststhatinsectsandmammalscanhearthesoundsupto5metersawayandrespond.Forexample，amoth（蛾子）maydecidenottolayeggsonawater-stressedplant.EdwardFarmer，attheUniversityofLausanne，Switzerland，isdoubtful.Hesaidthattheideaofmothslisteningtoplantsis"alittletoospeculative". Ifplantsarescreamingforfearoftheirsurvival，maybeweshouldbegladwecan'thearthem.（1）WhatdidKhaitandhisteamfindfromtheirresearch？______A.Plantsmadelow-pitchedsoundswhenindanger.B.Plantspickedupawiderrangeofsoundswhenstressed.C.Plantswereabletoproducesoundsinresponsetostresses.D.Plantsmadeultrasonicnoisestocommunicatewitheachother.（2）Howdidtomatoandtobaccoplantsreacttodifferentstresses？______A.Aplantreactedtodifferentstresseswiththesamesound.B.Cuttomatoplantsproducedmoresoundsperhourthanwater-hungryones.C.Cuttobaccoplantsseemedtomakeweakersoundsthandrought-stressedones.D.Tobaccoplantsmightmakeloudersoundsthantomatoplantswhenshortofwater.（3）What'sthemainideaofParagraph6？______A.Thepotentialapplicationsoftheresearch.B.Challengesfacingfarmersinthefuture.C.Farmers'contributionstotheresearch.D.Whatthefutureagriculturewillbelike.（4）Whatdoestheunderlinedword"speculative"inthelastbutoneparagraphprobablymean？______A.Practical.B.Unconfirmed.C.Surprising.D.Complicated.
正确答案：（1）C．细节理解题。根据第一段" In a yet-to-be-published study， Itzhak Khait and his team at Tel Aviv University，in Israel，found that tomato and tobacco plants can make ultrasonic（超声的）noises.The plants "cry out" due to lack of water，or when their stems（茎）are cut. It's
题目解析：
本文是一篇人生感悟类阅读，主要讲述了科学家的一项发现：植物在压力的情况下可以发出声音。就此研究人员训练了一个机器学习模型，将植物的声音与温室里的风、雨和其他噪音分开，并把这个应用到农业上。
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