人教課標(biāo)版高中英語必修2Unit 3 Computers課件.ppt

Unit 3 Computers,keyboard,mouse,monitor,screen,speaker,host computer,Write out all the words you know about computers.,computer,monitor,click,software,search,update,download,Internet,keyboard,other useful words and expressions about computer,Network 網(wǎng)絡(luò) Website 站點(diǎn) Program 程序 Virus 病毒 Hacker 黑客 Download 下載 Software 軟件 Hardware 硬件,Up load 上傳 Home page 主頁 Password 密碼 Desk top 桌面 User name 用戶名 Click 點(diǎn)擊,Look at the following pictures and say their English names.,I. Warming up,An abacus,A calculator,Warming up,huge computer,PC,Warming up,laptop,PDA,robot,Whats next?,Discuss with your partner the following questions. What do these pictures have in common? What do they tell you about the development of computers? What do you think will be the next development?,Warming up,(What do they have in common?),I think that In my opinion I believe that Whats your reason? Why do you think so?,1.They can be used for calculating. 2.They can deal with maths problems. 3.They are our friends. 4.They are useful and helpful.,Discussion,Work in pairs. Try to put these inventions in an order according to the time when they appeared. Then read the passage quickly and check to see if you were right. ( ) analytical machine ( ) laptop ( ) calculating machine ( ) robot ( ) PC ( ) universal machine,II. Pre-reading,2,5,1,6,4,3,The development of computers:,1.Calculating machine,2.Analytical machine,3.Universal machine,4Artificial intelligence,5.Computer,6.Internet,calculate universal simplify sum operator,vt. 計算 adj. 普遍的；宇宙的 vt. 簡化 n. 總數(shù)；算術(shù)題；金額 n.（電腦）操作員； 接線員,logical logically technology technological revolution,adj. 合邏輯的；合情理的 adv. 邏輯上；合邏輯地； 有條理地 n. 工藝；科技；技術(shù) adj. 科技的 n. 革命,artificial intelligence intelligent solve reality personal,adj. 人造的；假的 n. 智力；聰明；智能 adj. 智能的；聰明的 vt. 解決；解答 n. 真實(shí)；事實(shí)；現(xiàn)實(shí) adj. 私人的；個人的； 親自的,personally tube total totally network,adv. 就個人而言；親自 n. 管；管子；電子管 adj. 總的；整個的 n. 總數(shù)；合計 adv. 完全地；整個地 n. 網(wǎng)絡(luò)；網(wǎng)狀物,web application finance mobile rocket,n. 網(wǎng) n. 應(yīng)用；用途；申請 n. 金融；財經(jīng) n. 可移動的；機(jī)動的 n.火箭,explore anyhow (anyway) happiness human race,vt. & vi. 探索；探測；探究 adv. 無論如何；即使如此； 至少 n. 幸福；快樂 人類,根據(jù)構(gòu)詞法猜測詞義 The meaning of the words in group A can all be guessed from their formation. Each pair of words has the same root（詞根）. technology technological simple simplify person personal real reality happy happiness,While-reading,1.Fast reading(Read the passage quickly and check your prediction.What is the main idea of the passage?) This passage is about _.,III. While-reading,the development of computers,根據(jù)上下文猜測詞義 The meaning of the words in group B can all be guessed from context. Example: revolution: From the previous sentence we know that after the work of the operator, “I could think logically and produce an answer quicker than any person”, which indicates a great improvement, so “revolution” here may mean “a complete change”.,While-reading,Useful phrases,calculating machine Analytical machine card with holes technological revolution universal machine artificial intelligence go by by internet human race,計算器 分析機(jī) 穿孔卡 技術(shù)革命 萬能機(jī),通用機(jī)器 人工智能 走過，過去 通過網(wǎng)絡(luò) 人類,2. Read the passage again. Find the topic sentence of each paragraph and the supporting details. Paragraph 1: Over time I have been changed quite a lot. 1. calculating machine 2. analytical machine 3. universal machine 4. laptop,While-reading,Paragraph 2: These changes only became possible as my memory improved. 1. tubes 2. transistors 3. chips 4. network 5. World Wide Web,While-reading,Paragraph 3: Since the 1970s many new applications have been found for me. 1. communications 2. finance 3. trade 4. robots 5. mobile phones 6. medical operations 7. space rockets 8. providing a life of high quality,While-reading,Summary A topic sentence sets out the main idea of a paragraph. A topic sentence is usually the first or last sentence of a paragraph.,While-reading,calculating,analytical,universal,mathematical problems,Medical operations,Memory,Transistors,Applications,Communication,Trade,Task Listening,I began as a _ machine in 1642 in France. In 1822 I was built as an _ machine. Then in 1936 Alan Turing wrote a book and built a _ machine. As the years have_ _ , I have been made _ . There were times when my size _ changed. And my memory became _ large _ I couldnt believe it. In the 1960s they gave me a family_ by a network. I was able to _with others through the World Wide Web. Since the 1970s many new applications _ for me.,calculating,Analytical,universal,gone by,smaller,totally,that,connected,have been found,share my knowledge,so,Listen to the tape and fill in the blanks,What can you use computers to do?,Computer and Internet,type my homework,draw pictures,play games,communicate with my friends.,gather information for my lessons,listen to music,watch movies,How do you use computers and the Internet?,Yes,No,I often use a computer to, I sometimes use it to, and I never use it to,Discussion Something to think about:,With the development of computer technology, the internet had become more and more popular among students. However, just as a saying goes, a coin has two sides. The internet brings both advantages and disadvantages to students. Work with your partners to list some advantages and disadvantages of the internet. Advantages: Disadvantages:,Summary: what have we learned?,1.some words about computers. 2 the development of computers 3.use computer correctly.,advantages we can communicate with friends listen to the music see films & watch news play games do shopping save a lot of time do a lot of useful things,Disadvantages Some people especially the teenagers abandon (沉迷于) themselves