高中英语牛津译林版（2020）必修第三册Unit 3The world online Welcome to the unit & Reading 课件(21张ppt)

(共21张PPT)
Section A
Welcome to the unit & Reading
Vocabulary
1. take off
take构成的其他短语：
take down写下；拆除
take on呈现；雇用；承担（责任）
take up 开始从事；占据
take over接管
take in 吸入；理解；欺骗
练习：The writer is famous now, but his career really only ___________ after his many years' hard work.
took off
2. access
have /get /gain access to. . . 拥有……的机会；可以接近／进入……(to为介词）
give (sb.) access to. . . 准许（某人）使用或见到……（to为介词）
access to + n. （to为介词）通往……的路
英语中有不少像access，solution，key，approach（方法）这样的名词，它们常与介词to连用；这些名词与介词to的搭配常作为命题的重点，要注意识记。
练习：It will provide you with access __________ University facilities such as University Libraries, the Sports Centre, and Computing Services.
to
3. majority
（1）the majority 单独作主语时，谓语动词用单数或复数形式均可；强调整体时用单数形式，强调个体时用复数形式。
（2）“a/the majority of+可数名词复数”作主语时，谓语动词用复数形式；“a/the majority+集体名词”作主语时，谓语动词用单数或复数形式均可。
major adj.大的，主要的 vi. 主修（＋in） n. 主修课程
a/the majority of. . . 大多数……
in a/the majority 占大多数
练习：Jessica says the majority of her customers _________ (be) male, but she has a surprising number of female customers as well.
are
4. arrangement
make arrangements (for. . . ) (为·······)筹备
come to/arrive at an arrangement 达成协议
arrange vi. & vt. 安排，筹备 vt. 整理，布置
arrange for sth. 安排某事
arrange to do sth. 安排做某事
arrange for sb.to do sth. 安排某人做某事（注意介词for不可省略）
练习：That accident totally upset our ______________ (arrange) and caused a lot of problems.
arrangements
5. establish
establish contact/relations with... 与……建立联系／关系
establish sb. /sth. /yourself (as...)
使某人／某物／自己确立（……）的地位
establishment n. 确立；建立
established adj. 已确立的；公认的
练习：He left his library and half of his estate (个人财产) to the organization, which was the biggest donation ever since its _________ (establish).
establishment
6. comment
make comments/a comment on/about... 对……发表评论
make a comment that... 发表评论称……
comment on/upon... 评论……
comment that... 评论称……
练习：The professor, who was opposed (反对) to the project, made a comment _________ the report.
on/about
7. aware
be / become/feel aware of. . . 意识到／发觉……
make sb. aware of. . . 使某人知道／意识到……
be/ become/ feel aware that. . . 知道／意识到……
as far as I'm aware (=as far as I know) 据我所知
unaware adj.不知道，未察觉
be/become unaware of. . . 不知道……，没意识到……
awareness n. 意识，知道
raise/increase (one's) awareness of. . . 加强／增强（某人）对……的意识
练习：The fact that so many people still smoke in public places suggests that we may need a nationwide campaign (运动) to raise ________ (aware) of the risks of smoking.
awareness
Leading in
·When was the first email sent
The first email was sent in 1971.
·When was the first webcam created
The first webcam was created in 1991.
·What were emojis used to do
Emojis were used to express ideas or feelings in electronic communication.
·Which of the above inventions do you use most frequently Why
·What other facts do you know about the Internet
·What do you often do on the Internet
I use the Internet to search for information that helps me with my homework.
I use it to read about the latest news on topics I am interested in. I use communication software to keep in touch with my friends. I use different apps to listen to music, take photos or play games. I enjoy shopping online, so I sometimes order food or clothes from my favourite restaurants or stores. I watch films or TV shows to relax when I have free time.
Thinking
·What effects do you think the Internet has on your life
I depend a lot on the Internet to keep up to date with what is happening and to arrange my daily life. I stay in touch with my friends and family easily on my phone. Watching films or playing games online in my spare time is one way to entertain myself. The Internet makes my life less stressful because everything is conveniently available at the touch of a button. Without it, my life would be very different.
Main idea
一句话概括文章大意：
The Internet has brought many life-changing advantages, but we should be aware of its potential problems.
Introduction
Para. 1: We can achieve almost anything online.
Main body
Para. 2-4: The Internet has many advantages.
Conclusion
Para. 5: We should use the Internet properly and responsibly.
Advantage 1
We have quick and easy access to a huge amount of information online.
Advantage 2
E-commerce has made our lives unbelievably convenient.
Advantage 3
The Internet helps us establish and maintain social ties.
Advantages Supporting details
Advantage 1 ·Having access to (1) a huge amount of information
·Gathering information quickly and easily
Advantage 2 · (2) Having food delivered to you
·Doing shopping quickly and easily
·Ordering a taxi with an app
·Making travel arrangements
· (3) Paying for almost everything on the smartphone
Advantage 3 ·Keeping in contact with loved ones
·Finding (4) long-lost friends
·Discovering communities who (5) share our hobbies
Read and answer
（1） What power does the Internet have
The Internet has the power to connect people across the world to a single shared community.
（2）What should we be mindful of when dealing with the Internet
We must be aware of the potential problems of using the Internet and be careful to use it properly and responsibly.
（1）How can we use the Internet properly and responsibly
·We should never browse websites which could present potential danger.
·We must be aware of signs that warn us of dangers and viruses.
·We should not spread incorrect or illegal information on the Internet.
·We should not easily trust some strangers we meet on the Internet.
·We must keep our private information safe, such as our phone numbers, addresses, bank accounts, etc.
Read and think
（2）How does the author support his argument in this article
Firstly, the author introduces his argument by providing some truly life-changing advantages the Internet has brought to us. Then the author provides examples as evidence to support his argument from three aspects, during which, the author compares each aspect from before and after the invention of the Internet. And finally, the author summarizes that the Internet can be a place of discovery, wonder and inspiration for everyone, but only if we use it properly and responsibly.
（3）Cohesive devices are words or phrases that signal to the reader that something important is about to happen. For example, it can indicate the start of a list of ideas (to begin with, the first thing is that) or demonstrate contrast (but, however). Cohesive devices hold the content together so that it reads logically.
Can you find the cohesive devices used in this article
One of the greatest advantages of the Internet lies in the quick and easy access to a huge amount of information.
The Internet has also made our lives unbelievably convenient, with all sorts of goods and services provided by electronic commerce, more commonly known as e-commerce.
Above all else, the Internet helps us establish and maintain social ties.
However, while the Internet brings many valuable advantages, being connected has its problems.