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高二英语第二册第二十三单元

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本节课由吴建平老师主讲

Unit 23

Telephones

Some earliest telephones

Fast reading:

How was one telephone connected with another in the past?

How is one telephone connected with another today?

By thick heavy wires.

By satellite; by very thin glass pipes.

Choose the best answers.

1.When you speak into the telephone , the waves of your voice are

turned into ____.

A.electrical sounds B.electrical signals C.light signals

2.The handle of an old telephone was used for ______.

A.producing enough electricity to make a call

B.connecting with another telephone

C.getting better electrical signals

3.The job of an operator(接线员） is _____.

A.to wind the handle for customers and charge the phone calls

B.to connect the two numbers, to time and charge the phone calls

C.to mend telephones and telephone wires

4.____ can be used to send telephone signals over long distances

by satellite.

A.Sound waves B.Water waves C.radio waves

5._____ makes it possible for people at different places to hear one

another speak.

A.Redirection B.Conference meeting C.Call waiting

6.The service of redirection makes sure that ______.

A.you can receive calls wherever you are

B.all the telephone calls can be received by your secretary

C.telephone calls can be recorded if you are not at your office

the earliest telephones

The quality of the

earliest telephones

At the beginning it was difficult to hear

people over a long distance

The wires of the

earliest telephones

thick ,heavy and expensive

How to make a

telephone call in

those days?

have to wind a handle to produce electricity.

call the operator and tell her which number you

wanted. The operator connected the two numbers

and made a note of the length of the call and the

charge.

The number of the

earliest telephones

in 1877, 2600

the way to send

signals

Metal wires were used to send electrical signals

in the past. The problems with electrical signals

is that they get weaker and weaker as they travel

along metal wires.

some modern telephones

Ericsson

Concept Phones

This small computer-like

Telephone is still a mystery.

telephones of the present day

Improvements that

have been made.

Instead of using metal wires to send electrical

signals,very thin glass pipes,about 1mm wide,

are used to send signals.Because light signals

can travel 150 km without getting weaker,and

their signals is clearer, too.

cordless phones

It has no wires.it can be useful in office or in

the factory. You can carry it with you and look

up the information your caller wants. That is,

you can walk to a distant part of the office or

factory to check the information without

putting down the phone.

The number of

telephones by

1990.

300 million

the ways in which

new models of

telephone can

be used

1. conference calling

2. dialling

3. redirection

4. call waiting

How a telephone works?

When you speak into the telephone, the sound

waves of your voice are turned into electrical

signals. The signal is sent down a pair or wires

to receiving telephone. There the electrical

signal is changed back into sound.

advantages of

mobile phone:

It has no wires and can be carried about.

It is smart.

With the development of science and technology it will has more and more functions.

Today,Mobile Phone is not the very thing that you can call each other.It’s more than a telephone,a communicating tool.It develops to be multifunction (多功能的）and useful.With a Mobile Phone you can take photos ,listen to music,surf on the Internet,have meetings,watch TV,send E-mails and E-cards.

Watch Phone – a kind of

mobile phone which looks

like a watch.

I-mode（时尚） telephone

They can download a lovely,Popular cartoon animal----Kitty Cat as the Screen Saver (屏保).

The I-mode uses can connect with the Internet

frequently ,Send and receive E-mails, and seek

the hotels and bars.

Photo-taking and song-listening Phone

You can take photos and make them into characterful（个性化的）

E-cards and send out.On the top of it is a recording lens(录象镜头).

The big clear screen can be convenient to browse the net page when

you surf on the Internet.In addition,you can listen to music as you

are enjoying the recorded video.

Mobile phones which can be used for surfing on the Intent .

Meeting—Plate– a

Kind of phone used

for conference calling,

which has A big screen.

The colored screen takes up three-fourths of

the body.

NTTDoCoMo

64MB—Memory Download Mobile Phone

You can download songs.It is equipped

Inside with a 64MB RAM内存.

The most attractive thing is that it has a

256-color screen.

Mobile phones which can be

used to listen to music.

PDA （掌上电脑）mobile phones

Lesson NinetySome important and Difficult Language Points

1.turn into (使)变成,把…翻译成

Eg.Ice was turned into water by the heat.

She has turned her old dress into a skirt.

Can you turn the text into good English?

2.send down 把…向下发送,使(温度,价格)下降

Eg.The signal is sent down a pair of wires to the receiving telephone.

这个电信号就是沿着两根导线向下发送到受话机上.

3.change into=turn into

Eg.Snow has changed into water.

4.make a call=call,give a call打电话

Eg.May I use your phone? I’d like to make a call to Mr. Brown.

*make a call (another meaning is to visit sb.)

5.make a note (notes) of 记录,记录下,写下Eg.When reading,I always make careful notes.

***5.make a note (notes) of 记录,记录下,写下

Eg.When reading,I always make careful notes.

*make/take a note(notes) of “注意,理会

6.instead of 代替(contrast: instead adv.)Eg.I will go instead of you. Also: I will go instead.

Multiple Choices:

1.Hi,Jim, you are ______on the phone.

A.speaking B.being wanted C.wanted D.spoken

2.Do I have to pay to get in? No, it’s ________.

A.free of change B.free of charge

C.free to change D.free to charge

3. - Hello. Can I speak to Peter, please?

-______. I’ll go and get him.

A.There’s no Peter here. B.Speaking.

C.Hold on,please. D.Wrong number.

4.—How much did the coat cost?

---Just five dollars. It’s a real _____.

A.bargain B.value C.worth D.price

B

C

C

A

5.Though the mobile phone is quite small, its ____ is very clear.

A.signal B.mark C.sign D.marks

6.Tom likes to___this kind of cap on.

A.wear B.have C.put D.dress

7.I bought the telephone here yesterday,but now it ______ work.

A.can’t B.didn’t C.wouldn’t D.doesn’t

8.She _____ his number in the phone book to make sure that she had got it right.

A.looked for B.picked out

C.picked up D.looked up

9._____he will come to help us is not clear.

A.That B.Whether C.Either D.What

10.—Hello.Is that Mike? --___.This is 322567.

A.Yes,this is B.No, I’m not C.No, it isn’t D.Yes

More and more people are using the kind 1.________

of new-developed phone which is called mobile 2.________

phone. It has not wires and can be carried 3.________

in your pocket easy wherever you go. With 4.________

the phone you may accept or make phone 5.________

calls. People carry mobile phones are 6.________

most businessmen,. Now with the further 7.________

development of modern technology, it 8.________

serves like a secretary that is quite 9.________

fit the job. 10.________

a

newly

no

easily

receive

who carry

mostly

√

as

fit for

Error correcting

Homework

Retell the text.

Finish off Wb exercises.

That’s ALL for Today!

If you have any questions, please ask me after class.

Thanks for Coming!

BYE!