老托福30篇听写正确文本和生词摘录

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1、30篇听写正确文本和生词摘录托福听写作业1正确原文：ThismorningIwanttotellyouaboutarecentscientificdiscoverydealingwiththerelationshipbetweenplantsandanimals.Thisisaboutadesertshrubwhoseleavescanshootastreamofpoisonousresinadistanceofsixfeet.Youthinkitwouldbesafefromallattacksbyinsects?Butare

2、centstudyhasfoundoneinsect,abeetlethatcanchewitswaypasttheplant'sdefensesystembycuttingthemainveinthatdeliversthepoisontotheleaves.Thisveincuttingisjustonemethodthebeetlesusedtoprepareasafemeal.Anotherisbycuttingapathallthewayacrosstheleavestoholdtheflowofchemicals.T

3、hentheysimplyeatbetweentheveinsofpoison.Inthepast,scientistswhostudiedinsectadaptationtoplantdefenseshavefocusedonchemicalresponses.Thatis,howtheinsectscanneutralizeoralterthepoisonoussubstancesplantsproduce.What'suniqueaboutthischewingstrategyisthatthebeetleisactual

4、lyexhibitingabehavioralresponsetotheplant'sdefensesratherthanthemorecommonchemicalresponse.Itisonlyafterabeetle'ssurvivedseveralencounterswiththeplant'sresinthatitlearnshowtoavoidthepoison:bychewingthroughtheresintransportingveinsonthenextleafiteats.Andthusgivesitsel

5、fasafemeal.However,itcantakeabeetleanhourandahalfofcarefulveincuttingtoprepareasmallleafthattakesitonlyafewminutestoeat.So,thoughthemethodiseffective,it'snotveryefficient. 生词摘录：1.shrub:n.灌木2.resin:n.树脂3.beetle:n.甲壳虫4.vein:n.静脉5.neutralize:v.中和6.alter:v.改变32/3230篇听写正确

6、文本和生词摘录托福听写作业2正确原文：Humanpopulationsneartheequatorhaveevolveddarkskinovermanygenerationsbecauseofexposuretothefiercestraysofthesun.Asimilarphenomenonhasalsooccurredinotherpartsoftheanimalkingdom.TheAfricangrassmouseisagoodexample.Mostmicearenocturnal,buttheAfricangras

7、smouseisactiveduringdaylighthours.Thismeansthatitspendsitsdayssearchingforfoodinthesemi-drybushinscrubbyhabitatsofeasternandsouthernAfrica.Itsfurrystripe'slikeachipmunk's,whichhelpsitblendinwithitsenvironment.Becauseitspendsalotoftimeintheintensetropicalsun,thegrassm

8、ousehasalsoevolvedtwoseparatesafeguardsagainstthesun'sultravioletradiation.First,likethepopulationofhumansinthisregionoftheworld,th