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1、智课网托福备考资料托福阅读时间不够,做不完怎么办?很多托福考生反映托福阅读篇章长,时间不够,做不完,这就需要考生注意信息分析了。下文中,以一篇托福阅读文章为例,提取它的难词,难句,复杂的文章结构,说明我们应该如何从阅读文章中获得信息资源,加快答题速度。很多托福考生反映托福阅读篇章长,时间不够,做不完,这就需要考生注意信息分析了。下文中,以一篇托福阅读文章为例,提取它的难词,难句,复杂的文章结构,说明我们应该如何从阅读文章中获得信息资源,加快答题速度。GeologistshavelongknownthattheEarth'
2、smantleisheterogeneous,butitsspatialarrangementremainsunresolved—isthemantleessentiallylayeredorirregularlyheterogeneous?Thebestevidenceforthelayered-mantlethesisisthewell-establishedfactthatvolcanicrocksfoundonoceanicislands,islandsbelievedtoresultfrommantleplum
3、esarisingfromthelowermantle,arecomposedofmaterialfundamentallydifferentfromthatofthemid-oceanridgesystem,whosesource,mostgeologistscontend,istheuppermantle.Somegeologists,however,onthebasisofobservationsconcerningmantlexenoliths,arguethatthemantleisnotlayered,but
4、thatheterogeneityiscreatedbyfluidsrichin"incompatibleelements"(elementstendingtowardliquidratherthansolidstate)percolatingupwardandtransformingportionsoftheuppermantleirregularly,accordingtothevagariesofthefluids'pathways.Webelieve,perhapsunimaginatively,thatthis
5、debatecanberesolvedthroughfurtherstudy,andthattheunderexploredmid-oceanridgesystemisthekey.一、难词spatial:a.1.空间的,太空的;2.存在(或者发生)于宇宙空间的plume:n.1.羽状物2.柱,地柱xenolith:俘虏岩percolate:v.1.渗透2.扩散到,弥漫于portions:n.一部分二、难句1.thebestevidenceforthelayered-mantlethesisisthewell-estab
6、lishedfactthatvolcanicrocksfoundonoceanicislands,islandsbelievedtoresultfrommantleplumesarisingfromthelowermantle,arecomposedofmaterialfundamentallydifferentfromthatofthemid-oceanridgesystem,whosesource,mostgeologistscontend,istheuppermantle.对于地幔分层论点来说,最好的证据乃这样一个
7、确认的事实,即在那些海洋岛屿——这些岛屿据信是源于由下层地幔升上来的地幔柱状溶岩流(mantleplume)——上发现的火山岩石,是由与海洋中部山脊系统的物质根本不同的物质构成的,而这一海洋中部山脊系统的成因,大多数地质学家论辩道,为上部地幔。难句类型:复杂修饰、插入语解释:本句前面的主干并不算难,即theevidenceisthefactthat,难就难在fact之后说明fact的同位语从句。此从句中既有大段插入语,又有从句,较为难读。同位语从句的主语是volcanicrocks,主语后面的foundonoceanic
8、islands是分词修饰volcanicrocks的;islands后面又有一个说明islands的同位语islandsbelievedtoresultfrommantleplumesarisingfromthelowermantle,此同位语实际起到一个分隔主谓的同位语的作用。其后是谓语动词arecomposed/