Period ThreePeriod Three

Definition of virtual reality

virtual reality:

Pictures made by computers that seem real-life to the person looking at him or

the use of computers with sounds and pictures that make you feel as if you were in a real situation.

headsets and special gloves and suits equipped with sensors

the user can directly interact with a 3D(dimension) computer programme by moving ‘inside’ it.

Playing virtual reality computer games

Possible uses for virtual reality now

Learning to fly using virtual reality simulator

Visiting virtual museums on the Internet

(1) Is virtual reality holidays possible now?

(2) Do we have virtual universities now?

.

1. Why can’t Cathy go out this weekend?2. Where is Tom planning to go ?3. Does Cathy Have a programme

for‘virtual’holidays on her computer?

. Read the dialogue and answer the questions below.

4. Does she really think she will have the chance

to go on a world tour?

5. What would Tom like to do with virtual reality?

6. Why is Cathy so excited about the technology?

Why can’t Cathy go out this weekend?

She has to finish her project.

Where is Tom planning to go ?

He’ll go camping if the weather is good.

Does Cathy Have a programme for ‘virtual’ holidays on her computer?

No.

Does she really think she will have the chance to go on a world tour?

No.

What would Tom like to do with virtual reality?

He would like to go to a world-famous university.

Why is Cathy so excited about the technology?

Because she thought she would be able to go anywhere she liked.

时 间 If 条件句 主 句

过 去 had done Would 等 +have done

现 在 did / were Would 等 + do

将 来should do

were to do

did / were

Would 等 + do

Subjunctive mood :

1) The volleyball match will be put off if it _____. 　 A. 　 will rain 　 B. rains 　 C. rained 　 D. is rained

2) --- Would you have called her up _ ____ possible?

--- Yes, but I _____ busy doing my homework.

A. had it been … was B. if it was … were

C. if it had been … had been D. if it were … would be

B

A

3) You didn’t let me drive. If we ____ in turn, you ____ so tired.

（ 96 N ）

A. drove…didn’t get B. had driven…wouldn’t have got

C. drove…wouldn’t get D. were driving…wouldn’t get

B

4) It is hard for me to imagine what I would be doing today if I

_____ in love, at the age of seven, with the Melinda Cox

Library in my hometown. 　 (02 上海 )

A. wouldn’t have fallen B. had not fallen

C. should fall D. were to fall

B

5 ） What would have happened, _____ as far as the river bank? 　

A. Bob had walked farther B. if Bob should walk farther

C. had Bob walked farther D. if Bob walked farther

6 ） If you _____ him yesterday, you _____ what to do now.

A. asked … would know B. had asked … would have known

C. asked him … know D. had asked … would know

C

D

7 ） Jack ____ yet, otherwise he would have phoned me. (N 97)

A. mustn’t have arrived B. shouldn’t have arrived

C. can’t have arrived D. needn’t have arrived

C

8 ） The teacher demanded that the work _____ before 4 o’clock.

A. finished B. be finished C. should finish D. finish

9 ） --- What did the doctor say about your mother’s illness?

--- He suggested that she _____ an operation at once.

A. must have B. had C. have D. had had

B

C

Check answers on your work book ！

Harvard University

University of Cambridge

University of Oxford

Tsinghua University

Beijing University

• What are the advantages and disadvantages of a virtual university?

• Would you like to go to such a university? Why?

Real university• Advantages:1. Learn and improve one’s social skills2. Attend all kinds of colorful activities3. Communicate with different sorts of

people 4. ……..• Disadvantages:1. Have to pay a lot of money for study2. Not safe enough3. ……..

Save money to build the walls and teaching buildings.

Anytime, anyplace It is convenient to attend More comfortable

learning environment Don't have to pay tuition Save transportation time Lower cost :download

text material instead of buying

Advantages of a virtual university

1. Can’t learn and improve someone’s social skills

2. Nonverbal languages like gestures are important cues in FFC

(Face-to-face communication )3. Can’t go to a virtual university without

special equipments (special headset and gloves)

Disadvantages of a virtual university

什么是虚拟现实技术呢？简单地说，就是人们利用计算机生成一个逼真的三维虚拟环境，通过自然技能使用传感设备与之相互作用的新技术。它与传统的模拟技术完全不同，是将模拟环境、视景系统和仿真系统合三为一，并利用头盔显示器、图形眼镜、数据服、立体声耳机、数据手套及脚踏板等传感装置 , 把操作者与计算机生成的三维虚拟环境连结在一起。操作者通过传感器装置与虚 拟环境交互作用，可获得视觉、听觉、触觉等多种感知，并按照自己的意愿去改变“不随心”的虚拟环境。

比如，计算机虚拟的环境是一座楼房，内有各种设 备、物品，操作者会如同身临其境一样，可以通过各种传感装置在屋内行走查 看、开门关门、搬动物品；对房屋设计上的不满意之处，还可随意改动。

• Writing:

Write a short passage about

“The advantages and disadvantages of a virtual university”.