人教必修2Unit3Computers (2).ppt
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1、Unit 3 Computers Look at these pictures. Discuss what they have in common. Predict what it is going to be about.Warming upWhats next?Pre-reading questions1. What have computers changed our life?2. What changes will they bring to us in the future?Task 1 Skimming1. Who is the speaker in this story? A
2、computer.2. Write down three sentences from the story to support your idea. 1) I was built as an Analytical machine by Charles Babbage.2) My real father, Alan Turing, 3) I was always lonely standing there by myself, until in early 1960s they gave me a family connected by a network.Task 2 Fast readin
3、g1. Where were you in 1642? In France.2. What happened to you after nearly two hundred years? I was built as an Analytical Machine by Babbage.3. What were you called in 1936? A universal machine.4. What happened to you in the 1970s? I have been used in offices and homes.16421822 The analytical machi
4、ne was made by Charles Babbage.1936The computer began as a calculating machineThe computer grew rapidly both in size and in brainpower.Task 3 Careful reading1940s The first family of computers was connected to each other.1970s nowComputers had grown as large as a room.1960sComputers were used in off
5、ices and homes.Computers connect people all over the world together.DevelopmentEarly daysNameFunctionPoorStrongA _ machineSimplify difficult sumsAn _ machineThink logically and produce an answer quicklyA _ machineSolve difficult _calculatinganalytical universal mathematical problemsDevelopmentNetwor
6、k times_ stored inTubesLargeSmall_Small chips _Narrow WideFinance_RobotsMobile phones_Space rocketsMedical operations MemoryTransistorsApplicationsCommunicationTrade1completely2complete change3to make things easier4to find the answer using numbers5can be moved easily from place to place 6to work out
7、 the answer to a problemtotallyrevolutionsimplifycalculatemobilesolveTask 4 Fill in the blanks.7to travel around an area to find out about it8completely9anyway10activity of managing moneyexploretotallyanyhowfinanceThe history of computersthe second generation (1956-1963)the third generation (1964-19
8、71)the fourth generation (1971- )The first generation (1945-1956)1. What is PC? Speak the name on the whole.It means: personal computer.2. What is IT?Information Technology.3. What is CD-ROM?Compact disc read-only memory.4. What is PDA?Personal digital assistant.5. What is W.W.W?World wide web.6. 科学
9、技术。科学技术。Science and technology.7. 人工智能。人工智能。Artificial intelligence.8.笔记本电脑。笔记本电脑。Notebook computer.9. Who was the first person to devise the first computer? Charles Babbage invented an Analytical machine in 1822.10. Who was the computers real father?Alan Turing.Read the passage and then fill in the
10、 chart.Reading task on Page 58 RECORD CARDHUA FEI AbilityPerformance in 78th Olympics Prize won Performance in 79th Olympics Reason for failure Treatment Expert at high flying exercises: Olympic standardWonderful turns, dives, circles and dancesSilver medal for high flying exercisesBegan very well b
11、ut failed through no fault of his ownParachute failed to open.Two new legs and a new bigger head1. in common: for or by all of a group 共同的;共有的;共用的共同的;共有的;共用的 the land owned in common by the residents 居民共有的土地居民共有的土地 in common 常常同常常同have连用,如:连用,如: have nothing in common 无共同之处无共同之处 have little in commo
12、n 几乎无共同之处几乎无共同之处Language pointshave something in common 有一些共同之处有一些共同之处have a lot in common 有许多共同之处有许多共同之处以下是从英国国家语料库中选出来的几个例句以下是从英国国家语料库中选出来的几个例句:1) You know, Dorothy, you and I have one thing in common2) We just had nothing in common and I couldnt communicate with his dull business friends3) I sudd
13、enly felt we had a lot in common.2. calculate v. work (sth.) out by using numberse.g. calculate the cost of sth.calculator n. 让我们一起回忆一下以让我们一起回忆一下以or结尾的词吧:结尾的词吧:visitor, survivor, competitor3. analytical adj.分析的分析的, 解析解析的的 analyse vt. 分析分析;研究研究 analogy n. 相似相似;类似类似 analysis n. 分析分析;研究研究 analyst n. 分析
14、家分析家 analytic adj. 分析的分析的;分解的分解的4. artificial adj. 人工的人工的, 人造的人造的 artificial flowers/limbs/pearls 假花假花/假肢假肢/假珍珠假珍珠 artificial intelligence 人工智能人工智能5. As a result 结果;终于;因此。结果;终于;因此。考例考例 My friend Martin was very sick with a strange fever; _, he could neither eat nor sleep. (江西江西2005)A. as a result B.
15、 after all C. any way D. otherwise点拨点拨 考查短语辨析。考查短语辨析。as a result结果;结果; after all毕竟;毕竟; any way不管怎样;不管怎样;otherwise 否则。由句意可知要选否则。由句意可知要选as a result。 6. totally adv. 整个地整个地;完全地完全地 totally blind 全盲全盲 total adj. 完全的完全的; 整个的整个的 total silence 寂静无声寂静无声 in total 总共总共7. And my memory became so large that even
16、 I couldnt believe it!句型:句型:so that如此如此以致于以致于与与 tooto 句型的相互转换句型的相互转换And my memory became too large for me to believe it.eg He is so old that he cant carry the box.He is too old to carry the box. 此结构中的此结构中的that从句表示结果。从句表示结果。 The stone is so heavy that no one can lift it. 比较比较: so that 既可以表结果既可以表结果,也可
17、以表目的。也可以表目的。 so.that.结构的结构的so+形容词形容词/副词位于句副词位于句首时首时,句子用倒装结构。句子用倒装结构。So hard does he work that he seldom goes home.8. But I was always so lonely standing there by myself, until in early 1960s they gave me a family connected by a network. 点拨点拨 until表示表示“直到直到时时”,在肯定句,在肯定句中,指从开始到结束的整段时间,谓语动词中,指从开始到结束的整段
18、时间,谓语动词一般是延续性的。在否定句中构成一般是延续性的。在否定句中构成not . until,意为,意为“直到直到才才”,指到某一点动,指到某一点动作才开始,谓语动词一般是非延续性的。其作才开始,谓语动词一般是非延续性的。其强调句是强调句是it is (was) not until . that .。当。当not until位于句首时,句子要进行倒装。位于句首时,句子要进行倒装。如:如:The experts explored the island until the end of last year. 直到去年年底,专家们一直都在勘查这个直到去年年底,专家们一直都在勘查这个小岛。小岛。W
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