资源描述：
《精选托福阅读词汇笔记(九)-智课教育旗下智课教育》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、智课网托福备考资料精选托福阅读词汇笔记（九）-智课教育旗下智课教育本文和大家分享的是精选托福阅读词汇笔记系列的内容，供考生参考使用，希望考生能够认真备考，预祝考生能够考出好成绩。说起托福备考，很多人第一反应就是背词汇，作为语言最基础的单位，词汇自然是我们必须攻克的难题。但是独立的词汇记忆，效果肯定不会很好，所以智课教育托福小编精选了托福阅读词汇笔记系列，让大家记忆词汇的同时也能够复习托福阅读，一举两得，岂不乐哉。本文带来的是笔记九，大家一起在阅读中熟悉并记忆这些词汇吧。MarjorieRicewasanunlikelycandidatefortheroleofmathematic
2、alinnovator.Shehadnoformaleducationinmathematicssaveasinglecourserequiredforgraduationfromhighschoolin1939.Nonetheless,in1975shetookupaproblemthatprofessionalmathematicianshadtwiceleftfordead,andshowedhowmuchlifeasinitstill.Theproblemwastessellation,ortilingoftheplane,involvestakingasingleclo
3、sedfigureatriangle,forexample,orarectangleandfittingittogetherwithcopiesofitselfsothataplaneiscoveredwithoutanygapsoroverlap.Aregionofthisplanewouldlookratherlikeajigsawpuzzlewhosepiecesareallidentical.Riceworkedprimarilywithpolygons,whichconsistonlyofstraightlines.Morespecifically,sheworkedw
4、ithconvexpolygons,inwhichthelinejoininganytwopointsonthepolygonliesentirelywithinthepolygonitselforononeofitsedges(Afive-pointedstar,forexample,doesnotqualifyasaconvexpolygon.)BythetimeRicetookuptiling,itsbasicpropertieshadbeenestablished.Obviously,anysquarecantiletheplane,asmanykitchenfloors
5、havedemonstrated.Equilateraltrianglesarealsoafairlyclear-cutcase.Thereisoneotherregularpolygon(apolygonwhoseangles,andsides,areequal)thatcantiletheplane:thehexagon.ThisfactwasestablishedbytheancientGreeksbuthadlongbeforebeenexploitedbyhoneybeesinbuildingtheirhoneycombs.Andwhatofirregularpolyg
6、ons?Asitturnsoutanytriangleorquadrilateral,nomatterhowdevoidofregularity,willtiletheplane.Ontheotherhand,noconvexpolygonwithmorethansixsidescandoso,andthethreeclassesofconvexhexagonsthatcanwereuncoveredbytheendoftheFirstWorldWar.SotheonlyrealquestionleftbythetimeMarjorieRicebeganherworkwaswhi
7、chconvexpentagonstiletheplane.unlikely:a.不太可能的candidate:n.候选人,投考者mathematical:a.数学的,精确的innovator:n.改革者,刷新者formal:a.正式的,形式的,礼仪的;n.正式的社交活动beleftfordead:没有办法解决的难题tessellation:n.镶嵌装饰,棋盘形布置,镶嵌式铺装tiling:n.盖瓦,铺瓷砖,瓦类,花砖plane:n.平面,飞机,水准;a.平的,平面的,平坦的;v
