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_e_e(3篇)

时间:2024-08-25 16:21:01 来源:顶好范文网
导读: _e_e

篇一:_e_e

  

  字母E的发音规则一、单字母发音(一)单字母重读发音:(1)在重读开音节中,e一般读做/i:/。/i:/例如:she/?i?/,he/hi?/,these/ei?z/,Chinese/t?a??ni?z/;(2)在重读闭音节中,e一般读/e/。例如:set/set/,bed/bed/,ten/ten/(二)单字母非重读发音:在单字母非重读音节中,e一般读做/i/或/?/.(1)在重读音节前的非重读音节里,e一般读做/i/,但不完全是这样。例如:eleven/?"lev(?)n/,excuse/?k?skju:s;?k?skju:z/chicken/"t??k?n/pocket/"p?k?t/。(2)在重读音节之后的非重读音节里,e一般读做/?/,但不完全是这样。例如:enemy/"en?m?/,student/"stju?d(?)nt/,open/"??p(?)n/children/"t??ldr?n/,例外:chicken/"t??k?n/pocket/"p?k?t/等(3)词缀结尾发/i/或/?/business/?b?zn?s/,kindness/"ka?n(d)n?s/,sadness/"s?dn?s/,goodness/?ɡ?dn?s/,happiness/"h?p?n?s/airless/"e?l?s/,careless/"ke?l?s/(4)e不发音相对开音节最后一个e不发音,如bike,nice等。en,el结尾有时不发音,often/"?f(t?)n/,garden/"gɑ?d(?)n/,如listen/"l?s(?)n/,model/"m?dl/,travel/"tr?v(?)l/。security/s?"kj??r?t?/二、e与元音字母组合发音(含三个字母)(1)字母ea组合发音在重读开音节中,ea一般读做/i:/例如:sea/si?/,tea/ti?/,please/pli?z/,peace/pi?s/

  在重读闭音节中,ea一般读做/e/,,有时也读/i://e/:bread/bred/,weather,breakfast/"brekf?st/,head/hed/,heavy,dead/i:/:meat/mi?t/,repeat/r?"pi?t/,real/ri?l/有时读作/ei/例如:great/gre?t/,break/bre?k/,steak也有读作/??/情况例如:idea/a?"d??/,theatre/"θ??t?/,real(2)ee一般读做/i:/例如:meetjeepseesheepsleep特殊情况coffee/"k?f?/(3)ei一般读做/ei/,/i:/,偶尔读/ai//ei/:eight,neighbour,they/i:/:ceiling,receive/ai/:either(4)ey重读一般读做/ei/或/i:/,轻读读/i//ei/:grey/i:/:key/i/:monkey,turkey(5)eu/ew大多读做/ju:/,在j,l,r,s后读/u://ju:/:new/nju?/,few/u:/:blew/blu?/,grew,flew,threw/θru?/,sewer/"su??;"sju??/特殊:sew/s??/(6)ear一般读做:/?:/例如:early,earth,learn/??/例如:bear,wear/i?/例如:hear,near,dear/a:/例如:heart,hearty(7)eer一般读做/i?/例如:pioneer,engineer,deer,beer

  (8)eir一般读做/??/例如:their(9)ere一般读做/??/例如:where,there/i?/例如:here,mere特殊:were/w?:/(10)eau一般读做/ju:/例如:beauty,beautiful三、R音节发音:er组合发音(1)er在重读音节中一般读做/?:/,/?:/例如:term,verb,certain特殊词汇:clerk/kla:k/(2)在词尾一般读做/?//?/例如:teacher,worker,clever(3)er+元音字母,一般读/i?/,r发/r/音。例如:zero/"z??r??/,hero/"h??r??/,serious/"s??r??s/,experience/?k?sp??r??ns/period/"p??r??d/,

篇二:_e_e

  

  e在数学里是什么意思

  e是一个实数。她是一种特殊的实数,我们称之为超越数。据说最早是从计算(1+1/x)^x当x趋向于无限大时的极限引入的。当然e也有很多其他的计算方式,例如e=1+1/1!+1/2!+1/3!+…。

  e,作为数学常数,是自然对数函数的底数。有时称它为欧拉数,以瑞士数学家欧拉命名;也有个较鲜见的名字纳皮尔常数,以纪念苏格兰数学家约翰·纳皮尔引进对数。它就像圆周率π和虚数单位i,e是数学中最重要的常数之一。

  扩展资料:

  已知的第一次用到常数e,是莱布尼茨于1690年和1691年给惠更斯的通信,以b表示。1727年欧拉开始用e来表示这常数;而e第一次在出版物用到,是1736年欧拉的《力学》(Mechanica)。虽然以后也有研究者用字母c表示,但e较常用,终于成为标准。

  以e为底的指数函数的重要方面在于它的函数与其导数相等。e是无理数和超越数(见林德曼—魏尔施特拉斯定理(Lindemann-Weierstrass))。这是第一个获证的超越数,而非故意构造的(比较刘维尔数);由夏尔·埃尔米特(CharlesHermite)于1873年证明。

  其实,超越数主要只有自然常数(e)和圆周率(π)。自然常数的知名度比圆周率低很多,原因是圆周率更容易在实际生活中遇到,而自然常数在日常生活中不常用。

篇三:_e_e

  

  e_e元辅e组合的英语单词30个

  e_e元辅e组合的英语单词30个如下:

  1.bete(French)-meaning"beast"or"monster"Example:Jevisunebetedanslaforêt.(Isawabeastintheforest.)2.dele(verb)-meaningtodeleteorremoveExample:Pleasedelethatparagraphfromthedocument.3.fete(noun)-meaningafestivecelebrationorpartyExample:Wewenttoasummerfeteinthevillage.4.keel(noun)-thecentralbeamofavessel"sbottomExample:Thekeelprovidesstabilitytotheboat.5.lees(noun)-sedimentorresidueatthebottomofaliquid

  Example:Thewinetastedbitterbecauseithadnotbeenseparatedfromthelees.6.meek(adjective)-quiet,gentle,andeasilyimposedonExample:Shehadameekandhumbledemeanor.7.peep(verb)-tolookquicklyandfurtivelyortomakeashort,high-pitchedsoundExample:Shepeepedthroughthewindowtoseewhowasthere.8.reef(noun)-aridgeofrocksorsandbelowthesurfaceoftheseaExample:Theshipwreckwaslocatedonacoralreef.9.seek(verb)-toattempttofindorobtainExample:Shesoughtadvicefromalawyerduringthelegaldispute.

  10.teem(verb)-tobefullorswarmingwithExample:Themarketplacewasteemingwithshoppersduringtheholidayseason.11.veep(noun)-informaltermforvice-presidentExample:Theveepaddressedthenationonmattersofnationalsecurity.12.weep(verb)-tocryorshedtearsExample:Shecouldn"thelpbutweepwhensheheardthesadnews.13.beef(noun)-themeatofacoworbullExample:Wehadgrilledbeeffordinner.14.deer(noun)-ahoofedgrazingorbrowsinganimalExample:Wespottedadeerintheforest.15.feet(noun)-pluraloffoot,thelowerextremityoftheleg,belowtheankle

  Example:Hewalkedonhisfeetalldayandwasexhausted.16.geek(noun)-apersonwhoisextremelyknowledgeableorenthusiasticaboutaparticularsubjectoractivityExample:Myfriendisacomputergeekandcanfixanytechproblem.17.heel(noun)-thebackpartofthefootbelowtheankleExample:Herheelwashurtingafterwearinghighheelsallnight.18.jeep(noun)-asmall,ruggedvehicleusedforoff-roadtravelExample:Wedroveajeepthroughthemountainsonourcampingtrip.19.keet(noun)-ayoungguineafowlExample:Thekeetswererunningaroundthefarmyard.

  20.leek(noun)-avegetablewithalongwhitebulbandgreenleavesExample:Sheusedleeksinhervegetablesouprecipe.21.meek(noun)-amemberoftheMennoniteChristiandenominationExample:Themeekareknownfortheirpeacefulandsimplelifestyle.22.peep(noun)-aquickorfurtivelookExample:Hetookapeepattheanswerkeyduringtheexam.23.reef(verb)-toreducetheareaofasailbyfoldingorrollingpartofitandsecuringittotheboomormastExample:Thesailorreefedthesailsasthewindpickedup.24.seek(noun)-anattemptorefforttofindorobtain

  Example:Hisseekforadventureledhimtotravelacrosstheglobe.25.teem(noun)-alargequantityofsomethingExample:Theoceanteemedwithcolorfulfishandmarinelife.26.veep(verb)-toactasavice-presidentExample:Afterthepresident"sresignation,shewaschosentoveep.27.weep(noun)-theactorprocessofsheddingtearsExample:Herweepatthefuneralwasatestamenttohergrief.28.beef(verb)-tocomplainorgrumbleExample:Hewouldalwaysbeefaboutthetrafficonhiswaytowork.29.deer(verb)-toseeorobserve

  Example:Shecoulddeerthemajesticanimalsgrazinginthefield.30.feet(verb)-towalkorgoonfootExample:Wedecidedtofeettothenearbycaféinsteadofdriving.

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