[推荐精选]Unit 4 Astronomy- the science of stars上课学习上课学习教案
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Unit 4 Astronomy: the science of
stars教案
Unit
4
Astronomy:
the
science
of
stars教案Teachingaims:
.Talkaboutthescienceofstars
2.PractisegivinginstructionsTeachingdifficulties:1. Learntousenounclausesasthesubject
2.Learntowriteanessaytoshowyourproblemsandthewaytoo vercomethem.
3.Vocabulary:astronomy,atmosphere,violent,explode,s urface,disappointed,gradually,cheer,mass,harmful,pr esence,intime,prevent…from…dependon,nowthat,getthehangof,breakout
Teachingprocedures:ThefirstperiodIntensivereading StepⅠPresentation
T:Hello,everyone!TodaywewillcometoUnit4,Astronomy.B eforethatIhaveaquestion:wheredowecomefrom?orwecansa y:whoareourancestors?
S1:monkeys!
S2:BeijingRenwholivedmanyyearsago.
S3:dinosaurs
…
T:Verygood!Doyouknowwhatitwaslikebeforelifeappeared onearth?
S4:Fullofwater…
Bs:Idon’tknow.
T:Doyouwanttogetmoreinformation?
Ss:yes,wedo.
T:Todaywewilllearnsomethingabouthowlifebeganonearth .Turntopage25.Let’scometowarmingupfirst.
StepⅡwarmingup
.Readthethreequestions,whilethestudentslistenan
dfollow.
2.Givethestudentsseveralminutestodiscussthequestion s.
3.collectanswersfromtheclass.
4.checkanswerswhilediscussing.
StepⅢPre-reading
Getthestudentstodiscussthequestionsonpage25withthei rpartners.Thenaskthestudentstotelltheirstories.Enco uragethemtotelldifferentstories,Iftheydon’tknowany,tellthemsome.
T:Nowdiscussthesequestionswithyourpartners.ThenIwil lasksomeofyoutotellusyourstories.Areyouclear?
Ss:yes.
a.Doyouknoweachreligionorculturehasitsownideasabout thebeginningoftheuniverse?Giveanexampleifyouknow.
b.Doyouknowwhatascientificideais?
Readsomestoriestothestudents.
Panguseparatestheskyfromtheearth;
TheBiblicalAccount;
India;
japan;
Europe;
…
StepⅣReading
.Scanning
Getthestudentstoreadthepassagequicklyandaccuratelya ndmeanwhilehelpthestudentstoformagoodhabitofreading .Givethestudentsacoupleofminutestolookthrouththewho lepassage.Tellthemtoreadsilentlyandthenasksomedetai ledquestionsaboutthetext.Encouragethemtoexpressthei rideas.
T:wearegoingtolearnapassageabouthowlifebeganontheea rth.Nowreadthetextquicklyandthenanswermyquestions.
a.whatwasthereontheearthbeforelifebegan?
b.whydoscientistthinktherehasneverbeenlifeonthemoon?
c.whydoanimalsfirstappearinthesea?
d.whydogreenplantshelplifetodevelop?
e.whyweremammalsdifferentfromotheranimals?
Discusstheanswerswiththewholeclass.
2.Skimming
Inthispart,studentswillreadthetextagainandfinishpar t1,2,3
T:Nowskimthepassagefasttofinishpart1,2,3,4Thenwewil lchecktheanswerstogether.
keytopart1:DBIGEHAcFj
Discusstherestwiththestudents.
StepⅤListening
Listentothetapeforthestudentstofollowandhavefurther understandingofthepassage.
T:Readafterthetape,thenanswermesomequestionswithyou rbookclosed.
a.Howdidwatercomeintobeingontheearth?
b.whyiswaterimportantonearth?
StepⅥLanguagepoints
T:Turntopage25.Let’slookatthesentences:
a.Itexplodedloudlywithfireandrock,whichwereintimeto producethewatervapour.
whichleadsnon-restrictiveattributiveclause.
intime:soonerorlater;eventually
Iwillseehimintime.
Intime:notlate
Shewillbebackintimetopreparedinner.
In/outoftime:in/notinthecorrecttime
Theaudienceclappedintimetothemusic.
b.Nobodyknewthatitwasgoingtobedifferentfromotherpla netsgoingaroundthesun.
Bedifferentfrom:notlikesomeoneorsomethingelseinoneo rmoreways
citylifeisquitedifferentfromcountrylife.
c.whetherlifewillcontinueontheearthformillionsofyea rstocomewilldependonwhetherthisproblemcanbesolve
d.
Tocome:servesasattributive
Sheisthelastpersontodosuchathing.
Dependon:somethingmightonlyhappenorbetrueifthecircu mstancesarerightforit
oursuccessdependsonwhethereveryoneworkshardornot.
d.walkingdoesneedabitofpracticenowthatgravityhascha nged.
Nowthat:becauseofthefactthat
NowthatIamfree,Icanenjoymusicforawhile.
Nowthatyouhavegrownup,youcandecideitbyyourself.
StepⅦHomework
.Retellthepassage
2.Rememberimportantlanguagepoints
ThesecondperiodLanguagestudy
StepⅠRevision
.checkretellingofthepassage
2.Translatethefollowingsentences.
a.你迟早会成功的.
b.我的车与你的不一样.
c.站在门旁边的那个人是谁?
d.他总是第一个来,最后一个走.
e.既然你已经长大了,你自己决定吧.
Suggestedanswers:
a.youwillsucceedintime.
b.mycarisdifferentfromyours.
c.whoisthepersonstandingbythedoor?
d.Heisalwaysthefirsttocomeandthelasttogo.
e.Nowthatyouhavegrownupyoucandecideityoursel
f.
StepⅡwordstudy
Thispartisaconsolidationofthewordslearntinthisunit. Askthestudentstodotheexercisesindividually.
a.Page27.Firstletstudentsfinishpart1,2
b.checktheanswerswiththewholeclass.
c.Givestudents3minutestofinishpart3.
d.Letthestudentsreadpart4forawhileandfinishit.
e.Turntopage63.Firstletthestudentsfinish1and2andche cktheanswers.
StepⅢPreparation
Showsomesentencesontheblackboard.
a.Atreehasfallenacrosstheroad.
b.youareastudent.
c.Tofindyourwaycanbeaproblem.
d.Smokingisbadforyou.
e.“Howdoyoudo?”isagreeting.
f.whatshesaidisnotyetknown.
g.Thatweshallbelateiscertain.
h.It’scertainthatweshallbelate.
T:whatpartdoestheunderlinedpartserveasineachsentenc e?orfinditssubjectineachsentence.
StepⅣGrammar
.Givethestudentssometimetofindthesentencesinthe passage.Thecollectanswersfromtheclass.
2.Showtypicalexamplesofhowtomakeasubjectclause.Guid etheSstofindoutwhatchangeswehavetomakewhenwemakease ntenceorcombinetwosentencesusingsubjectclause.Teach ershowstheexampleandSswritedownthesentences.
3.Turntopage6
4.Readthefollowingpassagequicklyandfin ishtheeightsentences.
4.Haveadiscussioninpairs.Thetopicismydream.onetalks
abouttheproblemsinhisstudyorlife,anothergivessomead vice.Remindthestudentstousethefollowingstructures
a.myproblemis…
b.mytroubleis…
c.Thequestionis…
d.myadviceis…
e.whatIthinkaboutitis…
f.Thefactis…
g.mysuggestionis…
StepⅤHomework
.Finishpart3
2.Finishpart3
Addedmaterial:
什么是黑洞？
就是在宇宙中有那么一些点，这些点的体积趋向于零而密度变得无穷大，由于具有强大的吸引力，物体只要进入离这个点一定距离的范围内，就会被这个强大的引力吸收掉，连光线也不例外。因此任何进入这个范围的物体都无法再逃出来，就是说，没有任何信号能够从这个范围内传出，因此这个范围的界限被称作视界，里面的情形人类无法看到。所以科学家给它起了个名字叫黑洞，英文就是blackhole。一颗燃烧尽了的恒星由于自身的重力而不断坍缩，最后就会形
成黑洞。
历时30年霍金改观点称黑洞能“吸”能“吐”
从事宇宙黑洞研究近三十年的世界天体物理学泰斗斯蒂芬•霍金在前不久承认“黑洞悖论”有误之后，21号，他在爱尔兰都柏林举行的一个学术研讨会上终于就自己的新发现向外界进行了详细阐述。
黑洞是宇宙中引力极强的区域。19世纪70年代，霍金首次提出黑洞能够辐射能量的理论，但是在引入这一理论的同时，霍金也制造了物理学上的一个巨大难题，因为他认为黑洞辐射不包含以前吸入物质的相关信息，而且随着黑洞的消失，曾经存在的黑洞的相关信息也会消失于无形。这与量子力学中认为物质信息不会完全消失的理论相矛盾。对此，过去近30年来，霍金的解释是：黑洞中的量子运动是一种特殊情况，这种说法受到了许多科学家的质疑。
如今，霍金终于改变了观点，在当天召开的学术研讨会上，霍金说，根据他的最新发现，黑洞并非只是吞噬物质。除了会在星系形成的过程中扮演重要角色外，在经过一段相当漫长的时间后，黑洞也会把一些曾被它吸入的物质信息向外界释放出来。
霍金的最新阐述被不少人称为黑洞理论的一个重要逆转。美国加州理工学院的理论物理学家约翰•普雷斯基就是其中之一。20多年前，霍金提出黑洞辐射理论时，普
雷斯基就一直坚持物质信息不会完全消失，当时两人还因此打赌。所以，在当天结束演讲后，霍金将一本百科全书赠予普雷斯基，作为打赌输了的代价，而普雷斯基则获得了全场的热烈掌声。
Blackholes
whatisablackhole?well,it'sdifficulttoanswerthisques tion,sincethetermswewouldnormallyusetodescribeascie ntificphenomenonareinadequatehere.Astronomersandsci entiststhinkthatablackholeisaregionofspaceintowhich matterhasfallenandfromwhichnothingcanescape----note venlight.Sowecan'tseeablackhole.Ablackholeexpertsas tronggravitationalpullandyetithasnomatter.Itisonlys pace----orsowethink.howcanthishappen?
Thetheoryisthatsomestarsexplodewhentheirdensityincr easestoaparticularpoint;theycollapseandsometimesasu pernovaoccurs.Formearth,asupernovalookslikeaverybri ghtlightintheskywhichshineseveninthedaytime.Superno vaewerereportedbyastronomersintheseventeenthandeigh teenthcenturies.SomepeoplethinkthattheStarofBethleh emcouldhavebeenasupernova.Thecollapseofastarmayprod
uceawhiteDwarforaneutronstar---astar,whosematteriss odensethatitcontinuallyshrinksbytheforceofitsowngra vity.Butifthestarisverylargethisprocessofshrinkingm aybesointensethatablackholeresults.Imaginetheearthr educedtothesizeofamarble,butstillhavingthesamemassa ndastrongergravitationalpull,andyouhavesomeideaofth eforceofablackhole.Anymatterneartheblackholeissucke din.Itisimpossibletosaywhathappensinsideablackhole. Scientistshavecalledtheboundaryareaaroundtheholethe "eventhorizon."weknownothingabouteventswhichhappeno nceobjectspassthisboundary.Butintheory,mattermustbe haveverydifferentlyinsidethehole.
Forexample,ifamanfellintoablackhole,hewouldthinktha thereachedthecenterofitveryquickly.Howeveranobserve rattheeventhorizonwouldthinkthatthemanneverreachedt hecenteratall.ourspaceandtimelawsdon'tseemtoapplyto objectsintheareaofablackhole.Einstein'srelativityth eoryistheonlyonewhichcanexplainsuchphenomena,sothat thereisno"absolute"timeandspacedependonthepositiono ftheobserver.Theyarerelative.wedonotyetfullyunderst andtheimplicationsoftherelativitytheory;butitisinte
restingthatEinstein'stheoryprovidedabasisfortheidea ofblackholesbeforeastronomersstartedtofindsomeevide ncefortheirexistence.Itisonlyrecentlythatastronomer shavebegunspecificresearchintoblackholes.InAugust19 77,asatellitewaslaunchedtogatherdataaboutthe10milli onblackholeswhicharethoughttbeinthemilkyway.Andastr onomersareplanninganewobservatorytostudytheindividu alexplodingstarsbelievedtobeblackholes.
Themostconvincingevidenceofblackholescomesfromresea rchintobinarystarsystems.Binarystars,astheirnamesug gests,aretwinstarswhosepositioninspaceaffectseachot her.Insomebinarysystems,astronomershaveshownthatthe reisaninvisiblecompanionstar,a"partner"totheonewhic hwecanseeinthesky.matterfromtheonewecanseeisbeingpu lledtowardsthecompanionstar.couldthisinvisiblestar, whichexertssuchagreatforce,beablackhole?Astronomers haveevidenceofafewotherstarstoo,whichmighthaveblack holesascompanions.
Thestoryofblackholesisjustbeginning.Speculationsabo utthemareendless.Theremightbeamassiveblackholeatthe
centeronourgalaxyswallowingupstarsataveryrapidrate. mankindmayonedaymeetthisfate.ontheotherhand,scienti stshavesuggestedthatveryadvancedtechnologycouldoned aymakeuseoftheenergyofblackholesformankind.Thesespe culationssoundlikesciencefiction.Butthetheoryofblac kholesinspaceisacceptedbymanyseriousscientistsandas tronomers.theyshowusaworldwhichoperatesinatotallydi fferentwayfromourownandtheyquestionourmostbasicexpe rienceofspaceandtime.
Readthepassagecarefullyandchoosethebestanswerforthe followingquestions
)Blackholesarerelatedto____
A.geography
B.astronomyc.physicsD.economic
2)Ablackholeis____
A.adarkstar
B.alargeheavenlybody
c.aregionofspaceD.agreatmassofmatter
3)whatcausessomestarstoexplode,theoreticallyspeakin g?
A.theirdensity
B.theirgravity.c.theirmovementD.their
light
4)Scientistscalltheareaaroundtheblackhole____.
A.awhiteDwarf
B.asupernova
c.theeventhorizonD.thestarofBethlehem
5)accordingtoEinstein'srelativitytheory,thereisno"a bsolute"timeandspace.Isittrueorfalse?
A.true
B.false
6)whichofthefollowingstatementsisnottrue?Thestoryof blackholesinspace____
A.isacceptedbymanyseriousscientistsandastronomers
B.hastosomeextentbeenprovedbyresearchintobinarystar system
c.isquestioningourbasicideaofspaceandtime
D.Soundslikesciencefiction
7)accordingtothepassage,ourearthmaybeswallowingbyth eblackholeoneday,isittrueorfalse?
A.true
B.false
8)accordingtothepassage,thehumanbeingonedaymaymakeu seoftheenergyofblackholebyadvancedtechnology.Isittr ueorfalse?
全国卷2019届高考英语一轮复习Unit4Astronomy：thescienceofthestars课时作业新人教版必修3
Unit 4 Astronomy：the science of the stars Ⅰ.阅读理解 A How often have you read a story that a friend or family member has sent you？Very likely you would have skipped the news had it not been pointed out to you. Traditionally newspapers and famous TV channels have been our source of authentic news.But these days with the popularity of social media，sharing stories is increasingly becoming a favorite source of news.In fact，research suggests that more than half the people get their news today from social media such as Facebook，Twitter and Google. Social media sites often aggregate contents for us to see based on trending topics—stories that have been viewed by many others as well as based on our own past searches and analysis of our lik es and dislikes.If you have liked kittens in the past，you may have noticed that you are seeing more news，blogs and analysis about kittens all of a sudden. While advocates of free speech do not want to control any voice，it is certainly harmful when it is difficult to separate truth from fiction.Imagine the influence of fake(虚假的) news when it begins to affect our own lives.Trus ting a piece of news，patients could very easily fall for wrong diagnosis; elders could give money to cheats and reputation of perfectly upright citizens could be easily ruined.What about when we research for a school project and base our analysis on false information or news? Mark Zukerberg has finally acknowledged the issue.Among several projects that the company is considering，Facebook is trying to take powerful measures to crack down on false news.This would include warning labels on fake contents.Fake news also makes a lot of profits from advertising.Google and Facebook have said they will limit advertising profits on their network from such sites. The bottom line—don't believe every word of what you read.Do more research from multiple (多样的) sources to ensure that the news is indeed true before you share with others. [语篇解读] 本文为一篇说明文。现在社交媒体充斥着大量虚假信息，这些信息的传播对人们的生活危害很大。为了治理这种现象，一些社交媒体已经采取了一些措施。 1．What does the underlined word “aggregate” in Paragraph 3 probably mean? A．Analyze. B．Cancel.
第三方支付平台
D 实验三关于第三方支付平台（2学时） 1、现在第三方支付平台的格局如何以及各自所占有的市场情况是多少？ 2、请同学上网查询目前主要的第三方支付平台有哪些?大的网上商城采用的有哪些?(列表说 明) 网上商 快钱易宝支付宝Paypal 财付通首信易城 淘宝√ 易趣√ 当当网√√√√ 卓越网银行卡 支付 拍拍网√你认为哪几家第三方支付平台最有生命力,会长期生存下去? 我觉得易宝的生命力比较强，会长期生存下去。 （1）如果消费者可以享受到：安全的在线支付，方便的电话支付，免费的会员服务，为您的手机充植，精彩活动积分奖励。 （2）可以为商户提供：网上、电话、汇款，多种收款方式，支持外卡，让你您的生意做到全球，7*24小时客服，技术支持快速反应，接入更简单，交易更安全，结算更及时！ （3）功能有：会员登录安全设置：通过验证图片、提示问题、常用机校验等手段实现的双向安全验证机制，确保用户在任意场所登录易宝网站时的安全。 快捷查单服务：消费者通过此项服务可以方便快捷的查到自己选择YeePay易宝支付的网上购物订单！商户通过接入“快捷查单”功能，为客户提供贴心增值服务，提升服务品质和形象！ 自主接入服务：商户可通过自助方式网上注册并使用易宝在线支付服务，不仅可以在线收款，而且还能登录商户系统进行定单管理和交易结算。依托易宝强大平台，确保安全交易，并享受7*24小时客户服务及快捷查单等增值服务。 3、第三方支付牌照的颁发会对现行的网络支付以及银联会产生什么样的影响？ 易观国际分析认为，牌照发放后，获得牌照的企业将可接入超级网银，第三方支付企业以提高企业资金周转效率的定制化解决方案，将会逐步向传统企业进行渗透，也将出现从单一产业链的支付服务向跨产业链的融合转移的趋势。支付企业通过整合各种支付产品，为企业进行深度定制化服务，加快资金周转效率，而保险、基金等行业将是一个新的蓝海市场。 一旦涉及到钱，那么这个庞大的支付产业必定摆脱不了银行的介入。在《支付机构客户备付金存管暂行办法(06.02会议征求意见稿)》出台前，仅有支付宝等少数国内第三方支付公司委托银行每月对客户的交易保证金做托管审计，其他公司则会依托三四家银行提供备付金托管与清算服务。而随着今年5月26日首批支付牌照正式发放，一场第三方支付公司挑
Unit4 Astronomy
Unit4 Astronomy: The Science of the Stars Part I Vocabulary 1. violent/ violence/ violate 2. explode/ burst/ break/ blow up/ set off 3. unlike/ dislike/ unlikely/ likely/ possibly/ fond of/care for/take to/appreciate/ fancy etc. 4. harmful/harmless 5. fundamental/ essential/ basic/primary/ foundation/ found/ fund 6. lie/ lay/ lain/ laid/ laid/ lie in 7. exist/ exist(lie) in/ on/ by/ there exists(stands/lies/have been etc. )/come into existence(being) 8. thus/ therefore/ consequently/ hence/ so 9. pull in/out/up/down/over/through etc. 10 exhaust/exhausting/exhausted/ tired/worn out 11. spread/extend/ stretch/ scatter/ distribute 12. in time(for)/ on time/ in no time/ at no time/ at a time/ at one time/ at times 13. prevent/stop/keep… from/ protect/shelter… from 14. block out/ off/ up/ one’s way/ sb./sth. in 15. cheer up/on/for 16. now that/ since/ seeing that/ considering that/ in that 17. break in/ out/ up/ down/ into/away/ off 18. watch out/ over/ one’s step/ be on the watch/ keep watch on Part II Sentence Structure 1. But when I tried to step forward, I found I was carried twice as far as on the earth and fell over. 2. It was not immediately obvious that water was to be fundamental to the development of life. Part III Testing Points 1. violent/ violence/ violate 1. Tom’s father is so ______ that Tom is afraid to tell him he has failed. A. violent B. quiet C. happy D. pleasant 2. Like other cities in the world, American cities also contain the very worst parts of a society such as _____ crime, racial conflict (种族冲突) and poverty. A. violent B. intense C. common D. light 3. — Mr. Huang is very angry _____ Jim fought with Peter again. —No teacher likes _____ behaviour. We should try our best to behave well. A. because; violent B. so; violent C. and; guilty D. but; romantic 2. explode/ burst/ break/ blow up/ set off 1. The person said, “We must get rid of the bomb in the street, or when it ______ many people will be hurt.” A. explodes B. exploded C. will explode D. explodes 2. We must take steps to prevent the __________ world population. A. exploded B. exploding C. explosion D. explosively 3. When she heard from the hospital that her father had died, she _____ into tears.
第三方支付平台教案
第三方支付平台教学设计 授课人：宋文鑫授课时间：2016年12月30日?学习目标： ?1、认识第三方支付平台的概念组成； ?2、理解两种第三方支付平台的运行机制以及优缺点； ?3、使学生认识到第三方支付平台的发展可以改变我们的生活。 教学过程 一：案例导入 1.共同阅读案例，学生思考案例问题，得出问题答案。 2.进而引出对之前学习的知识的复习，回顾电子商务支付方式。 3.导入本课内容“第三方支付平台”，说明本课的学习目标，开始新课教学。二：新课教学 1.第三方支付平台概念 （1）学生阅读课本，找出第三方平台概念，通过课本知识填写学案。 （2）展示PPT，讲解第三方平台概念。但此概念过长不易记忆，教授学生记忆方法，将概念拆解进行记忆，引出课堂思考。 （3）学生思考学案问题，通过PPT引导学生理解概念以组块的方式进行记忆。 2.第三方支付平台分类 （1）学生阅读课本找出第三方支付平台的种类，可分为网关型第三方支付平台与信用担保型第三方支付平台。 （2）通过PPT学习网关型平台的运行模式以及优缺点，利用画图的方式使学生理解此类平台的运行模式，并回顾之前学过的知识点“支付网关”。 （3）理解信用担保型第三方支付平台运行模式，点出其典型代表支付宝，引出探究讨论。学生分小组讨论“支付宝的工作流程是什么？”并将讨论结果并落实纸面。提问小组代表，而后利用PPT分步展示其工作流程。 （4）简单介绍支付宝的产生、发展以及作用，讲解信用担保型第三方支付平台的优点。结合日常生活中支付宝付款、收款等功能，使学生认识到第三方支付平台的便利，相信第三方支付平台可以改变我们的生活。 三：总结 总结本课所学内容，与本课开始时提出的学习目标相呼应。 四：作业 1.以支付宝为例介绍第三方支付的交易流程并画出其流程图。 2.利用课后时间搜集其他的第三方支付平台，并比较其相同点和不同点。
人教版高中英语必修三Unit4Astronomy单元测试题
Unit 4 Astronomy 单元测试题 一、单项选择（10%） 1. Robert is interested in ____ astronomy and he wishes he could make a trip into ____ space one day. A. the, the B. an, the C. an, / D. /, / 2. A sudden noise made all the birds in the trees fly _____. A. in all direction B. from all directions C. in all directions D. to all directions 3. The boy___ when he said that he ___ the eggs___ by the hen in the closet before he ___down to have a rest. A. was lying, had laid, laid, lay B. had laid, lay, laid, was lying C. lay, was lying, lain, lay D. laid, lay, lain, lies 4. Can you believe that in ____ a rich country should be ____ many poor people ? A. such, such B. such, so C. so, so D. so, such 5. —Shall we go for a picnic this weekend? ---Well, ____. We’ll have to see if the weather is fine . A. it all depends B. it depends on C. O.K. D. I don’t know. 6. All made possible for China to succeed in carrying on its reforms and open-door policy. A. what happened; it B. what happened; that C. that happened; it D. that happened; that 7. It is never harmful ___ you to be polite and gentle to others and___, as is often the case, you can get what you want. A. to; thus B. for; thus C. of; therefore D. with; however 8. They are demanded to finish their work _______. A. all the time B. at the same time C. ahead of time D. for the first time 9. ______ his sister, he is fond of swimming very much. A. Likely B. Unlike C. dislike D. Like 10. To our _____, he did solve the _____ problem in such a short time! A. surprised, puzzled B. surprised, puzzling C. surprise, puzzling D. surprise, puzzled 二、完形填空（30%） From boyhood he was __1__ in Astronomy, __2__ while __3__ Cambridge he would sit up at night to watch the stars. But he was dissatisfied __4__ the telescopes of those days __5__ they didn’t show him a clear picture of things. At first he thought there must be something wrong with the lens(镜头). Bu no matter how hard he tried to improve the lens, the trouble was __6__ there. This set Newton thinking. He began to study the nature of light and colors. In the end he found that sunlight, or white light, is __7__ made up of a row of colors. He counted(数) seven colors __8__. This was of course a great discovery. But Newton still wasn’t __9__. His mind was busy with another problem. __10__ Newton’s time, scientists had already discovered that the sun, not the earth, was the center of the universe, and they knew that the earth and __11__ planets moved round the sun. but they couldn’t explain __12__ this was so until Newton gave the answer. One autumn evening while Newton was sitting under an __13__ tree __14__ these problems, he saw the moon __15__ in the sky. Why, he asked himself, should the moon round the earth, never leaving the same path? At that moment, he heard an apple __16__ from the tree. Why should the apple drop to the ground? Why didn’t it go sideways or fly up? There __17__ only one reason: The earth was drawing it ---that is the force of gravity. If a stone is tied to the end of a string and whirled（旋转）around, it flies round and round in circles because of the string. __18__, the force of gravity, thought Newton, must be the force that __19__ the moon going round the earth and the __20__ round the sun. 1. A. interested B. interest C. interesting D. interests 2. A. and B. but C. or D. otherwise 3. A. at B. for C. with D. on 4. A. with B. about C. at D. of 5. A. because of B. because C. in case D. in case of 6. A. still B. also C. already D. yet 7. A. actual B. total C. totally D. actually
英语必修三Unit4Astronomy课文翻译
英语必修三Unit 4 Astronomy课文翻译 作者：未知来源：尚学苑2014-09-20 LIF HOW E BEGAN ON THE EARTH No one knows exactly how the earth began, as it happened so long ago. However, according to a widely accepted theory, the universe began with a "Big Bang" that threw matter in all directions.After that, atoms began to form and combine to create stars and other bodies. For several billion years after the "Big Bang", the earth was still just a cloud of dust. What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. The earth became so violent that it was not clear whether the shape would last or not. It exploded loudly with fire and rock. They were in time to produce carbon, nitrogen, water vapour and other gases, which were to make the earths atmosphere. What is even more important is that as the earth cooled down, water began to appear on its surface. Water had also appeared on other planets like Mars but, unlike the earth, it had disappeared later. It was not immediately obvious that water was to be fundamental to the development of life. What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas. This produced a chain reaction, which made it possible for life to develop. Many millions of years later, the first extremely small plants began to appear on the surface of the water. They multiplied and filled the oceans and seas with oxygen, which encouraged the later development of early shellfish and all sorts of fish. Next, green plants began to grow on land. They were followed in time by land animals. Some were insects. Others, called amphibians, were able to live on land as well as in the water. Later when the plants grew into forests, reptiles appeared for the first time. They produced young enerally by laying eggs. After that, some huge animals, called dinosaurs, developed. They laid eggs too and existed on the earth for more than 140 million years. However, 65 million years ago the age of the dinosaurs ended. Why they suddenly disappeared still remains a mystery. This disappearance made possible the rise of mammals on the earth. These animals were different from all life forms in the past, because they gave birth to young baby animals and produced milk to feed them. Finally about 2.6 million years ago some small clever animals, now with hands and feet, appeared and spread all over the earth. Thus they have, in their turn, become the most important animals on the planet. But they are not looking after the earth very well. They are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space. As a result of this, many scientists believe the earth may become too hot to live on. So whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved.
第三方支付安全性及风险防范问题教案资料
第三方支付安全性及风险防范 一、第三方支付概念 第三方支付是阿里巴巴集团主席马云在2005年瑞士达沃斯世界经济论坛上首先提出来的，目前为止学术界还没有给出一个非常明确的概念。第三方支付是非金融机构从事金融业务的重要渠道，人民银行发布的《非金融机构支付服务管理办法》中将其定义为依托公共网络或专用网络，在收付款人之间作为中介机构，提供网络支付、预付卡的发行与受理、银行卡收单以及中国人民银行规定的其他支付服务的非金融机构。 从其形式上看，所谓第三方支付，就是具备一定实力和信誉的第三方独立机构提供的网络支付平台，它是以非银行机构的第三方支付公司为信用中介，以互联网为基础，通过与各家银行签约，使得其与商业银行间可以进行某种形式的数据交换和相关信息确认，实现持卡人或消费者与各个银行以及最终的收款人或者商家之间建立一个支付的流程。第三方支付通过其支付平台在消费者、商家和银行之间建立连接，起到信用担保和技术保障的作用，实现从消费者到商家以及金融机构之间的货币支付、现金流转、资金结算等功能。在网络交易中，买方选购商品后，使用第三方支付平台把货款支付给第三方，再由第三方通知卖家货款到达并要求卖家发货，买方收到商品并检验后通知第三方，由第三方将货款转至卖家账户。相对于传统的资金划拨交易方式，第三方支付可以对交易双方进行约束和监督，有效地保障货物质量、交易诚信、退换要求等环节，满足电子商务交易的安全性，为交易成功提供必要的支持。如支付宝、财付通等都属于此类平台。 与其他支付方式相比，第三方支付服务具有以下特征： （1）支付中介。第三方支付的具体形式是付款人和收款人不直接发生货款往来，借助第三方支付平台完成款项在付款人、银行、支付服务商、收款人之间的转移。第三方支付平台所完成的资金转账都与交易订单密切相关。 （2）中立、公正。第三方支付平台不直接参与商品或服务的买卖。公平、公正地维护参与各方的合法权益。
以支付宝为例的第三方支付平台分析电子教案
以支付宝为例的第三方支付平台分析
以支付宝为例的第三方支付平台分析 作者：马红梅 来源：《今日财富》2018年第24期 纵观市场上已经出现的第三方支付平台，支付宝实名用户超过5.8亿，是其中的佼佼者，其通过与众多知名的购物平台进行合作，迅速获取了知名度，在市场上获取了一席之地，并且成功坐上了第三方支付平台的霸主地位。本文阐述了以支付宝为例的第三方支付平台，通过其背景现状、主要服务、商业模式、技术手段与风险管理、发展前景这六个方面来对以支付宝为例的第三方支付平台进行分析。 一、背景现状 支付宝虽然已经发展为中国最大的第三方支付平台，但是支付宝的使用者大多数为年轻人，像一些中老年群体很少注册使用支付宝，这种情况也不难理解，支付宝极大的迎合了大部分群体方便快捷的消费需求，但还是有一部分人不愿意去使用支付宝，其中最主要的原因是其考虑到第三方支付的安全隐患。虽然这样，但是支付宝的使用人数却还是达到了让人叹为观止的程度。 二、主要服务 方便快速地查询账单、账户余额、物流信息；免费跨行转账，信用卡还款、生活缴费；消费信息智能提醒；为子女父母建立亲情账户；提供本地生活服务，推荐当地特色美食；买单打折尽享优惠；余额宝理财；支持接入手机健康数据，与好友一起互动，行走捐，参与公益。 三、商业模式 （一）运营模式 支付宝运作的实质是以支付宝为信用中介。首先买家在网上选中自己所需商品后与卖家协商，确定交易后买方需把货款汇到支付宝这个第三方账户上，支付宝作为中介方立即通知卖方钱已经收到，可以发货，待买方收到商品并确认无误后，支付宝随即把货款汇到卖方的账户以完成整个交易。支付宝在这个流程中充当第三方的角色，同时为买卖双方提供信誉，确保交易安全进行。 （二）主要盈利模式 首先支付宝作为第三方支付，最显著的收益是支付宝页面各种广告的广告费用，主要盈利渠道是收取手续费，即支付宝在快速提现、网购、航空客票等方面以加上毛利润的费率，向客户收取费用。其次在2005年，支付宝进入B2C业务，根据用户不同级别，给予不同的免费额度，并对超出的部分收取手续费从而获得稳定的收入。再次支付宝还有服务费的收益，主要分为理财相关业务和代缴费业务的服务费。 四、技术手段
高中英语Unit4Astronomy教案新人教版必修3
Unit 4 Astronomy: the science of the stars 随堂练习 1、Do you know the following subjects? ①Medicine Medicine is a subject that contains biology and chemistry. ②Biochemistry Biochemistry is a subject that contains biology and chemistry. ③Geophysics Geophysics is a subject that contains geology and physics. ④Astronomy Astronomy is a subject which uses knowledge both from mathematics and physics. 2、Think about what you have read and make choices. ①Why was the earth different from other planets?（B） A It produced a lot of heat. B The water remained. C Water disappeared. D It was the oldest planet. ②Why was life able to develop on the earth but not on other planets?（C） A The earth had a solid shape. B The earth did not have harmful gases in its atmosphere. C The water stayed on the earth but not on other planets. D The earth was not too hot and not too cold. ③Why was it necessary for plants to grow before animals?（B）
最全第三方支付平台对比
最全第三网上支付平台对比 今天的网上购物非常方便快捷,实现了不少人“足不出户买尽天下商品”的梦想,当然啦,网上购物之所以越来越流行,除了与网上商品越来越丰富有关外,也与网上购物的付款方式越来越简单、方便也是密不可分的,付款更容易,买卖自然更加畅通. 第三方网上支付、电话支付,甚至货到付款等不同的网上购物支付形式满足了不同的消费者需求,其中第三方网上支付系统平台无疑是网上购物付款的主要途径,今天我们就来详细对比一下流行的第三方支付平台,看看哪一个才是你的首选. 什么是第三方支付平台？ 第三方支付平台相当于一个中介人的角色,连接着商家与客户.客户在网上选定要购买的商品后,将货款支付给第三方支付平台,平台收到货款后通知商家发货,等客户收到商品后给出确认信息,第三方支付平台就会将货款转入商家的账户中.由于在整个交易过程中货款是寄存在第三方支付平台这个“中介人”处的,因此客户不用担心自己付款以后商家不发货,商家也不必担心发货以后客户不付款,就如客户在淘宝网、拍拍网等购物网站上购物,收到商品并确认商品没有质量问题,发出付款请求后,商家才能收到货款一样. 不过,随着第三方支付平台应用范围的扩大,在不少B2C网上商城购物也可以通过第三方支付平台付款,甚至订机票、交水电费、信用卡还款、网上买基金等都可以通过第三方支付平台来进行. 在目前主流的第三方支付平台中,阿里巴巴旗下的支付宝与腾讯旗下的财付通是最多人所熟悉的,他们分别有自己的购物网站淘宝网与拍拍网,支付宝与财付通这种依托自有网上购物网站发展起来的综合性支付平台是目前第三方网上支付市场的主力军,此外,也有一些购物网站与支付宝和财付通签约,客户可以通过它们来完成支付,因此综合性第三方支付平台的应用范围更为广泛. 此外,也有独立的第三方支付平台,如快钱、易宝支付（YeePay）、环迅支付、网银在线、首信易支付等,这类支付平台尽管缺少自有网上购物网站的支持,其独立的特点也让不少购物网站青睐；而且与综合性支付平台相比,它们的支付业务也各具特色,如快钱的生活类支付业务丰富,环迅支付的网游支付业务支持种类较多,首信易支付开展了不少支付返现的优惠活动……不得不提的一个第三方支付平台是ChinaPay,这是中国银联旗下的电子支付平台,作为一个“国”字辈的支付平台,ChinaPay 拥有的银行资源是最为丰富的,通过中国银联的平台,用户可以选择不同的银行卡进行网上支付. 下面我们就来全方位对比一下上述主流的第三方支付平台. 第三方支付平台大比拼
第三方支付平台典型案例
第三方支付平台典型案例 目前中国国内的典型第三方支付产品主要有： Paypal（易公司产品，流行于欧美国家）、支付宝（阿里巴巴旗下）、财付通（腾讯公司）、网易宝（网易旗下）、百付宝（百度 C2C）、银联电子支付（中国银联）、快钱（qqbill）等。 1、 支付宝 （一）简介 支付宝是阿里巴巴集团于2004年底创办的独立第三方支付平台。截至2012年12月，支付宝注册账户突破8亿，日交易额峰值超过200亿元人民币，日交易笔数峰值达到1亿零580万笔。目前除淘宝和阿里巴巴外，有超过46万的商家和合作伙伴支持支付宝的在线支付和无线支付服务，范围涵盖了B2C购物、航旅机票、生活服务、理财、公益等众多方面。这些商家在享受支付宝服务的同时，也同时拥有了一个极具潜力的消费市场。支付宝已经跟国内外160多家银行以及VISA、MasterCard国际组织等机构建立了深入的战略合作关系，成为金融机构在电子支付领域最为信任的合作伙伴。 （2） 发展历程
（三）商业模式 核心能力：一是强大的后盾为其提供的庞大客户群，淘宝网、阿里巴巴中国站都支持支付宝，这为支付宝获得了其他任何第三方支付平台无法比拟的客户数量；二是安全保障，支付宝对外推出“全额赔付”的政策，使用户有了安全保障。 盈利模式：截止2006年底，支付宝对所有用户均是免费使用，没有盈利模式。但从2007年2月开始，支付宝将向非淘宝网卖家收取一定比例的技术服务费用，收费标准约为交易总额1.5%。淘宝网用户可以继续免费使用支付宝。 经营模式：1.支付宝前期为淘宝网定制，后扩展到阿里巴巴中国站和非阿里巴巴旗下网站。后来随着产品的成熟，开始在阿里巴巴中国站和非阿里巴巴旗下网站推广。 2.与各大银行、金融机构合作，圈地电子支付市场。支付宝目前已和国内工商银行、农业银行、建设银行、招商银行、上海浦发银行等各大商业银行以及中国邮政、VISA国际组织等各大机构建立了战略合作，成为金融机构在网上支付领域极为信任的合作伙伴。另外，支付宝还与中国建设银行合作，发布了国内首张真正专注于电子商务的联名借记卡———支付宝龙卡及电子支付新产品——支付宝卡通业务。 3. 推出“全额赔付”等措施，打造安全信用体系。 4. 免费模式置对手于被动，扩大市场占有率：不收取费用,大型交易 额收取少量手续费；积极收集会员的心声。在论坛里有专门会员意
第三方支付平台系统_概要设计
系统概要设计说明书 XXX信息技术有限公司 2013年9月
文档控制页版本记录
目录 第一章引言 (3) 1.1 目的 (3) 1.2 背景 (3) 1.3 术语定义 (4) 1.4 参考资料 (4) 第二章系统环境 (5) 1.5 运行环境 (5) 1.1.1 系统支撑环境 (5) 1.1.2 部署图 (5) 1.1.3 系统接口.................................................................................... 错误！未定义书签。 1.1.4 系统安全控制............................................................................ 错误！未定义书签。 1.6 运行模块组合................................................................................ 错误！未定义书签。 1.7 运行环境的配置............................................................................ 错误！未定义书签。 1.8 条件与限制.................................................................................... 错误！未定义书签。第三章系统总体结构设计. (7) 1.9 系统结构设计描述 (7) 1.10 总体结构图 (8) 1.11 功能需求与程序的关系 (9) 1.12 子系统清单 (26) 第四章模块功能分配 (12) 1.13 系统划分及功能描述 (14) 1.14 专用模块功能概述........................................................................ 错误！未定义书签。 1.15 公用模块功能概述........................................................................ 错误！未定义书签。 1.1.5 版本控制管理............................................................................ 错误！未定义书签。 1.1.6 帮助模块.................................................................................... 错误！未定义书签。第五章数据库设计.. (42)