托福阅读否定事实信息题合集之TPO31-3托福阅读否定事实信息题是阅读考试十大题型之一,通常每篇阅读中都会出现;tpo是托福阅读备考最权威的材料,所以托福小编综合二者,为大家集中整理了tpo阅读中考察的否定事实信息题及其对应的解析,供大家参考使用。本文带来的是TPO31-3的否定事实信息题,一起来看看吧。TPO31-3SavannaFormationParagraph3:【3】Inmanycharacteristics,savannasoilsaresimilartothoseofsomerainforests,thoughmoreextreme.Forexample,savannasoils,likemanyrainforestsoils,aretypicallyoxisols(dominatedbycertainoxideminerals)andultisols(soilscontainingnocalciumcarbonate),withahighaciditynotablylowconcentrationsofsuchmineralsasphosphorus,calcium,magnesium,andpotassium,whilealuminumlevelsarehigh.Somesavannasoccuronwet,waterloggedsoils;otherdry,sandy,well-drainedsoils.Thismanyseemcontradictory,butitonlymeansthatextremesoilconditions,eithertoowetortoodryforforests,aresatisfactoryforsavannas.Moremoderateconditionssupportmoistforests.5.Accordingtoparagraph3,allofthefollowingaretrueofsavannasoilsEXCEPTA.Theyhavehighconcentrationsofpotassium.B.Theycontainhighlevelsofaluminum.C.Theyareveryacidic.D.Theycontainlargeamountsofcertainoxideminerals.解答:这一题对应forexample后面的内容,A直接和红色标注部分矛盾,因此是要选的except的选项。段落翻译:【3】虽然极端,但在大多数特点上,热带草原和雨林的土壤还是相似的。比如说,和许多热带雨林土壤一样,热带草原的土壤通常为含酸量高的氧化土(某些氧化物矿物占主导)和老成土(这些土壤中不含碳酸钙,磷、钙、镁、钾这样的矿物质含量非常低,而铝的含量却很高)。有些热带草原的土壤潮湿,呈溃水状态;而有些的土壤却干燥、多沙、易排水。这看起来矛盾,但却意味着只有像过度湿润或过度干旱那样的极端土壤条件,才适合热带草原,温润的气候适合湿润的森林。Paragraph6:【6】Oncertainsites,particularlyinSouthAmerica,savannaformationseemsrelatedtofrequentcuttingandburningofmoistforestsforpastureland.Increaseinpasturelandandsubsequentovergrazinghaveresultedinanexpansionofsavanna.Thethinupperlayerofhumus(decayedorganicmatter)isdestroyedbycuttingandburning.Humusisnecessaryforrapiddecompositionofleavesbybacteriaandfungiandforrecyclingbysurfaceroots.Oncethehumuslayerdisappears,nutrientscannotberecycledandleachfromthesoil,convertingsoilfromfertiletoinfertileandmakingitsuitableonlyforsavannavegetation.Forestsonwhite,sandysoilaremostsusceptibletopermanentalteration.12.Accordingtoparagraph6,humanactivityaffectssoilsinallofthefollowingwaysEXCEPTA.Decompositionofleavesoccurstoofastforsurfacerootstoobtainnutrients.B.Nutrientsarenotrecycled.C.Humusisdestroyed.D.Certainsoilsbecomeunabletosupportvegetationotherthansavannavegetation.解答:humanactivity包括了cuttingandburning,然后这句的后面,从''increase....''开始就是后果。先说humusisdestroyed,对应C,然后humus对于decomposition是非常必要的,而humanactivitydestroy了humus,所以减慢了decomposition,和A矛盾。后面说nutrientscannot被recycled,对应了B。converting那一句对应了D。段落翻译:【6】在某些地区,特别是在南美洲,热带草原的形成可能和为了建造牧场而对湿润林地进行频繁的砍伐和焚烧有关。牧场的増加和随之而来的过度放牧导致了热带草原的扩张。稀薄的腐殖质(腐烂的有机物)上层被砍伐和焚烧行为所破坏。腐殖质是树叶被细菌和真菌迅速分解和根部表面循环的必需品。一旦腐面层消失了,营养物质便不能循环并渗入土壤中,土壤由肥沃变得贫瘠,这就使它只适合热带草原植被的生长。白土和砂土上的森林结构容易发生永久性的改变。以上就是托福阅读TPO31-3中的否定事实信息题及其解析,大家可以在备考的时候参考复习,希望能够帮助大家的考前准备。最后前程百利祝大家都能取得理想的托福考试成绩。