人教版高中英语 必修二 Unit3 《Computers---Warming up》 课件(共29张PPT).ppt

1、Unit 3ComputersWarming up高一人教新课标版必修二abacus1.Look at these pictures.In pairs discuss what they have in common.An abacus is an ancient tool used for counting.The abacus has been in existence in China since the second century BC until now,although the oldest counting boards have been found in fourth ce

2、ntury BC Rome.A calculatorA calculator is a new calculating machine which can solve a large number of mathematical problems.Huge computerThe first electronic counting machine in continental Europe.It was built to solve some mathematical Problems.The first tasks were solved on January,4,1951.But it i

3、s too big.A PC/desktopA PC is a personal computer which can solve all kinds of problems and is used widely now.A notebook computer is a kind of useful computer which can be taken conveniently like a notebook.A laptop/notebook computerPersonalDigital AssistantA very small light computer that you can

4、carry with you,and that you use to store information such as telephone numbers,addresses,and appointments.Some PDAs can send and receive email,and connect to the Internet.RobotRobot is a mechanical device that sometimes resembles a human and is capable of performing a variety of complex human tasks

5、on command or by being programmed in advance.Discuss what they have in common?You are asked to use the following expressions in your discussion.I think that In my opinionI believe thatI think they all can calculatesomething.They can deal with some math problems.I believe that they are our good frien

6、ds in our daily life.We can not finish our work quickly without them.In my opinion,they are being used widely and conveniently in the world.Do you know in what ways computers are used today?doing homework drawing picturesplaying gameswatching movies chatting with friendsgetting informationlistening

7、to musicanalytical machine（分析机）laptopcalculating machine（计算机器）robotPCuniversal machine（通用机器）Can you put these inventions in an order according to the time when they appeared?p17Task 1:Choose the best answer.1.Whats the main idea of the text?A.What a computer is.B.What a computer is used for C.How th

8、e computer becomes popular.D.The history of the computer.D2.“I”in the passage refers to _.A.A TV set B.A computer C.A radioD.The internet3.When was the computer the biggest?A.In 1642B.In 1936 C.In the 1940s D.In the 1970sBC4.How old is the computer?A.About 370 years old B About 270 years old.C.About

9、 170 years old.D.About 470 years old.A5.What can you infer from the text?A.The computer has artificial intelligence.B.The computer changes greatly over the years.C.The computer was not connected by a network until in the early 1960s.D.Now the computer can only be used to deal with information.B6.Who

10、 was the first person to make the earliest computer?A.Alan Turing.B.Charles Babbage.C.Charles Turing.D.Charles Alan.7.When was the universal machine built?A.In 1822.B.In 1642.C.In 1936.D.In 1940.BC8.What happened to the computer in the 1960s?A.It was put into robots and used to make mobile phone.B.I

11、t was given a family connected by a network.C.It began to be put into space rocketsD.It began to be used in the offices.B9.Which is the right order?a.The computer was connected with other computers.b.Alan Turing wrote a book about the computer.c.The computer has been sent to explore the Moon and Mar

12、s.d.The computer began to simplify difficult sums.A.a,b,c,d.B.b,c,a,d.C.d,a,c,b.D.d,b,a,c.D1.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.Task 2:Answer the following questions.3.What were you called in 1936?A u

13、niversal machine.4.What happened to you in the 1970s?I have been used in offices and homes.5.Who built the first analytical machine?Charles Babbage built the first analytical machine.6.Who was the next important person to design computers?Alan Turing was the next important person to design computers

14、.7.How did the computer work as an Analytical Machine?The computer followed instructions from cards with holes.8.What changes only became possible as my memory improved?Many changes happened to my size and brainpower.9.What new applications have been found for me?I have been widely used in many fiel

15、ds and have also been put into robots to explore the Moon and Mars.The computer began as a calculating machineThe computer grew rapidly both in size and in brainpower.Comprehending1.Read the passage and finish the timeline below.The computers had grown as a room.1960sComputers were used in offices a

16、nd homes.Computers connect people all over the world together.2.Read the passage again and complete the chart below.Over time I have been changed quite a lot.calculating machineanalytical machine universal machinePClaptopThese changes only became possible as my memory improvedtubestransistorschipsne

17、tworkWorld Wide WebSince the 1970s many new applications have been found for munications;finance;trade;robots;mobile phonesmedical operationsspace rocketsproviding a life of high qualityHomework1.Read the passage after class and try to find any words and expressions you cant understand.2.Try your best to recite the paragraph(p3).