人教版 (2019)必修 第二册Unit 3 The internet备课ppt课件

这是一份人教版 (2019)必修 第二册Unit 3 The internet备课ppt课件，共31页。PPT课件主要包含了素养导航 ，Ⅰ知识体系图解 ，blog ，chat，stream，identity，引擎发动机火车头，以开始，太以至于不，与聊天等内容，欢迎下载使用。
主题语境——人与社会　科学与技术
The InternetThe Internet,a system architecture① that has revlutinized② cmmunicatins and methds f cmmerce③ by allwing varius cmputer netwrks arund the wrld t intercnnect.Smetimes referred t as a “netwrk f netwrks”,the Internet appeared in the United States in the 1970s but did nt becme useful t the general public until the early 1990s.By 2015,abut 3.2 billin peple,r nearly half f the wrld’s ppulatin,can have access t the Internet.
The Internet prvides a capability④ s pwerful and general that it can be used fr almst any purpse that depends n infrmatin,and it is accessible by every individual wh cnnects t ne f its netwrks.It supprts human cmmunicatin thrugh electrnic mail (e-mail),“chat rms,” newsgrups,and audi and vide transmissin⑤ and allws peple t wrk at many different places.It supprts access t digital infrmatin by many applicatins,including the Wrld Wide Web.The Internet has prved t be a prmising grund fr a large and grwing number f “e-businesses” that carry ut mst f their sales and services ver the Internet.Many experts believe that the Internet will change business as well as sciety withut dubt. 
The first cmputer netwrks were dedicated⑥ special-purpse systems such as SABRE (an airline reservatin system) and AUTODIN I (a defense cmmand-and-cntrl system),bth designed and used in the late 1950s and early 1960s.By the early 1960s cmputer prducers had begun t use semicnductr⑦ technlgy in cmmercial prducts,and time-sharing systems was in place in many large,technlgically advanced cmpanies.Time-sharing systems allwed a cmputer’s resurces t be shared in rapid speed with many users,cycling thrugh the queue f users s quickly that the cmputer appeared dedicated t each user’s tasks despite the existence f many thers accessing the system “at the same time.” This led t the idea f sharing cmputer resurces (called hst cmputers r simply hsts) ver an entire netwrk.Hst-t-hst interactins were envisined⑧,alng with access t specialized resurces and interactive access by remte users t the cmputatinal pwers f time-sharing systems lcated elsewhere.
互联网互联网是一种系统架构,它允许世界各地的各种计算机网络相互连接,从而使通信和商业方法发生了革命性的变化。因特网有时被称为“网络中的网络”,20世纪70年代出现在美国,但直到90年代初才对公众有用。到2015年,全球约有32亿人(接近全球人口的一半)可以上网。因特网提供了一种强大而普遍的能力,它几乎可以用于任何依赖信息的目的,而且每个连接到因特网的人都可以访问它。它支持通过电子邮件(电子邮件)、“聊天室”、新闻组、音频和视频传输进行人际交流,并允许人们在许多不同的地方工作。它支持许多应用程序访问数字信息,包括万维网。事实证明,对越来越多的“电子商务”来说,互联网是一个充满希望的领域。这些“电子商务”的大部分销售和服务都是在互联网上进行的。许多专家相信因特网将毫无疑问地改变商业和社会。
第一个计算机网络是专用的特殊目的系统,如SABRE(航空订票系统)和AUTODIN I(国防命令和控制系统),都是在20世纪50年代末和60年代初设计和使用的。到20世纪60年代初,计算机制造商已经开始在商业产品中使用半导体技术,分时系统在许多技术先进的大型公司中已经就位。分时系统允许计算机的资源快速的与许多用户共享,如此快速地在用户队列中循环,以至于计算机似乎专注于每个用户的任务,而与此同时还有许多其他用户在访问系统。这就产生了在整个网络上共享计算机资源(称为主机或简称主机)的想法。设想了主机到主机的交互,以及对专用资源的访问和远程用户对位于其他地方的分时系统计算能力的交互访问。
词海拾贝①architecture n.架构②revlutinize v.革命③cmmerce n.商业;贸易④capability n.能力⑤transmissin n.传输⑥dedicated adj.专用的⑦semicnductr n.半导体⑧envisin v.设想;想象
典句欣赏The Internet has prved t be a prmising grund fr a large and grwing number f “e-businesses” that carry ut mst f their sales and services ver the Internet.译文:事实证明,对越来越多的“电子商务”来说,互联网是一个充满希望的领域。这些“电子商务”的大部分销售和服务都是在互联网上进行的。分析:这是一个主从复合句。句中that引导定语从句,先行词为“e-businesses” ,在从句中充当主语。
理解诱思What can we safely say abut the future f the Internet?答案:It will change business as well as sciety withut dubt.
Sectin A　Listening and Speaking
Ⅱ.释义匹配1.blg　　　A.the part f a vehicle that prduces pwer t make it mve2.engine B.t talk t smene in a friendly infrmal way3.chat C.a flw f water,air,smke etc,r the directin in which it is flwing4.stream D.wh r what sb/sth is5.Identity E.a web page that is made up f infrmatin abut a particular subject,in which the newest infrmatin is always at the tp f the page答案:1.E　2.A　3.B　4.C　5.D
Ⅲ.完成句子1.Yu’d better write smething 　　　　　　　　　　　　(你感兴趣的). 2.I ften watch vides and　　　　　　　　　　　　　(在网上听音乐). 3.I am　　　　　　　　　　　　　　　　　　(太忙了无法去) t yur birthday party. 4.My brther ften　　　　　　　　　　　　　(查阅信息) n the Internet. 5.I enjy　　　　　　　　　(和……聊天) my friends nline. 
yu are interested in
listen t music nline
lks up infrmatin　
chatting with
重点词汇1.stream mvies and music 流播电影和音乐【词汇精讲】stream在句中是及物动词,意为“流播”。The grwth f smartphnes has made it mre attractive t wn and stream music legally.智能手机的发展已经使合法拥有和流播音乐更具有吸引力。This wuld allw users t stream vides n tw iPad screens at nce.它允许用户同时在两个iPad屏幕上播放视频。
【词汇拓展】stream可作不及物动词,意为“流动”,作名词,意为“小河,小溪”。Hearing the news,tears streamed dwn her face.听到这个消息,她泪流满面。A muntain stream runs thrugh this small village.一条山涧流过这个小村庄。
2.I especially like t chat with my friends and family.我特别喜欢同朋友和家人聊天。【词汇精讲】chat可作动词或名词,意为“聊天;闲聊”。I smetimes spend hurs chatting n the phne with my friends.我有时在电话上和朋友聊天一聊就是几个小时。This garden is a nice place fr a nice chat and a cup f cffee.这个花园是一个舒服的好地方,可以边聊天边喝咖啡。
I feel much better when I g hme t eat and chat with my parents and brther.当我回家吃饭,与我的父母哥哥聊天时我感觉好多了。A friend f mine visited me yesterday and we had a lng chat abut ur schldays.我的一个朋友昨天来找我,我们在一起说了很多关于我们在学校的生活。
3.And s I used a nnsense name fr my net identity.因此,我为网上的身份造了个名字。【词汇精讲】identity是名词,意为“身份;个性”。He gave himself a new name t hide his identity when he went t carry ut the secret task.当他去执行这项秘密任务的时候,他给自己起了一个新的名字来隐藏自己的身份。The by wanted a sense f his wn identity.那个男孩想要确立自己的个性意识。
Even the smallest baby can identify its mther by her vice.即使最小的婴儿也能辨识妈妈的声音。Eye witnesses identified the gunman as a yung man.目击者确认持枪歹徒是一个年轻人。
重点句式Smetimes,I am t busy t g nline.有时,我太忙了无法上网。【句式剖析】句中 d sth意为“太……而不能做某事”,是一个表示否定意义的句型。She was t excited t say a wrd when she heard the news.当她听到这个消息时她激动得说不出话来。They realized that it was t late t catch the last subway.他们意识到太晚了赶不上最后一趟地铁了。
【句式拓展】“”不同搭配下的不同含义:(1)某些形容词与“”句型连用时,t (=very) 表示肯定的意义。这些形容词多为表示情感的词,如glad,pleased,surprised,delighted,happy,easy,willing,ready,eager,anxius等。(2)结构和never或nt连用时,表示肯定意义。意为“无论……也不过分;越……越好”。They seemed t be t nervus and were t anxius t leave.他们看起来太紧张,并且急于离开。I am nly t glad t accept yur invitatin.我很乐意接受你的邀请。
Ⅰ.单词拼写1.We had t stp at the radside because there was smething wrng with the car’s 　　　　　(发动机). 答案:engine2.I wnder if yu’ll be free then s we can　　　　　(聊天) abut the gd ld days tgether. 答案:chat3.Yu will be allwed t g in nly when yur 　　　　　(身份) has been checked. 答案:identity
4.My sister writes a 　　　　　(博客) fr parents abut career develpment t help them guide their children. 答案:blg5.We are playing near the bank f the　　　　　(小溪),having fun with each ther. 答案:stream
Ⅱ.介词填空1.The mther ften makes lng-distance telephne calls t have a chat 　　　　　the children. 答案:with2.First f all,culd I begin 　　　　　an aplgy fr a mistake I made last week? 答案:with3.A few simple precautins(预防措施) can be taken,　　　 example ensuring that desks are the right height. 答案:fr4.I ften use a search engine t help me find what I am lking　　　　　. 答案:fr