北师大版高中英语必修第二册unit4 information technology sectionⅰ教学知识细解码学案

Unit 4 Information technology

1．trick vt.欺骗，诱骗，哄骗→tricky adj.狡猾的，诡计多端的

2．vary v．(大小，形状)不同；变化；不等→various adj.各种各样的→variety n．多样化，变化

3．instant adj.立刻的，马上的→instantly adv.立刻地，马上地

4．create v．创造→creativity n．创造力；独创性→creative adj.创造性的

5．obvious adj.清楚的，明显的→obviously adv.显而易见地，明显地

6．select v．选择，挑选→selection n．供选择的同类物品；选择

7．type vi.&vt.打；打字→typist n．打字员

8．concern n．担忧，忧虑vt.与……有关；使担心→concerned adj.关切的；关心的→concerning prep.关于，涉及

1．admit v．(常指勉强)承认；承认(过错、罪行)；招认；招供；准许……进入(某处)

①She admits to being strict with her children. 承认

②She admitted to having stolen the car. 供认

③You will not be admitted to the theatre after the performance has started.                准许进入

2．concern v．影响，牵涉(某人)；与……有关；涉及；让(某人)担忧n.(尤指许多人共同的)担心，忧虑；关爱；关心；(对人、组织等)重要的事情

①The individuals concerned are being questioned by the police. 涉及

②It concerns me that you no longer seem to care. 担忧

③She hasn't been seen for four days and there is concern for her safety. 担心

④The government's primary concern is to reduce crime. 重要的事情

Words and Phrases

　convenience n．方便；便利

(教材P6)provide convenience提供方便

[例1]　It was a great convenience to have the school so near.

学校这么近真是太方便了。

[例2]　Frozen fish is a kind of very healthy convenience food.

冻鱼是一种非常健康的方便食品。

[造句]　商店日夜服务，对群众来说非常方便。

Shops that stay open twenty­four hours a day are a great convenience to the public.

[即学即练]

①Please ask him to call me back at his convenience.

②Many people buy things online just for convenience.

③Come and see me whenever it is convenient for you.

[名师点津]

(1)convenient作表语时，不能用表示人的名词或代词作主语，多用于It is convenient for sb.to do...这一句型中。

(2)convenience意为“方便；便利”时为不可数名词；表示“便利的事物；便利设施”时为可数名词。

　addicted adj.对……着迷的；沉迷的

(教材P6) makes us addicted to it使我们沉迷于它

[例1]　Many of the women are addicted to heroin and cocaine.

这些女人中很多人都吸食海洛因和可卡因成瘾了。

[例2]　She says she's unable to give up smoking；she's completely addicted to it.

她说她无法戒烟，已经完全上瘾了。

[造句]　他最近玩电脑游戏有些走火入魔了。

He has recently become addicted to computer games.

[即学即练]

①Now many children addict themselves(them) to computer games.

②It doesn't take a long time to become addicted to these drugs.

[小片段填空]

While his wife was in hospital in the United States，he got totally ①addicted to alcohol，and his son ②addicted himself to computer games.As a result，his son has lost interest in his lessons，which makes his wife very angry.

　trick vt.欺骗，诱骗，哄骗 n．诡计；恶作剧；窍门

(教材P8) to trick others 欺骗其他人

[例1]　They had to think of a trick to get past the guards.

他们只好想出个计谋来骗过警卫。

[例2]　He used the old trick of attacking in order to defend himself.

他采用了以攻为守的老招数。

[造句]　这不是你半个小时就能学会的小窍门。

It is not just a little trick you can pick up in half an hour.

[即学即练]

①That guy tricked me into paying(pay) too much money!

②The people of the town liked to play tricks on him.

　a variety of 各种各样的

(教材P9) Yet，very few people knew that future avatars would have such a wide variety of forms and uses.

但是，几乎没有人想到，虚拟形象在未来居然有如此多样的形式和如此广泛的应用。

[例1]　People change their mind for a variety of reasons.

人们会由于种种原因改变主意。

[例2]　A variety of heavy industries grew up alongside the port.

各种重工业沿着港口逐渐发展了起来。

[造句]　这个花园有多个引人入胜之处。

The garden offers a variety of attractions.

[即学即练]

①There are varieties(vary) of plants in the forest.

②A baby's need for food can vary from day to day.

③These data have been collected from various(vary) sources.

[名师点津]

(1)a variety of/varieties of后面跟名词复数作主语，谓语用复数形式；

(2)the variety of后面跟名词复数作主语，谓语用单数形式。

　concern n．担忧，忧虑vt.与……有关；使担心

(教材P9) The use of avatars has also caused a few concerns．

虚拟形象的使用也已经引起了一些担忧。

[例1]　There is growing concern about violence on television.

人们对电视上充斥暴力内容的忧虑日益加重。

[例2]　The group has expressed concern about reports of political violence in Africa.

该团体对有关非洲政治暴力的报道表示关切。

[造句]　他已经一天没有来上课了，老师很担心他的安全。

He hasn't been to class for a day and the teacher is concerned about his safety.

[即学即练]

①More and more people are concerning themselves about environmental problems.

②The report expressed concern about/for continued high unemployment.

③And as far as your body is concerned(concern)，it's “use it or lose it”！

[小片段填空]

Besides doing his research work，Professor Li concerns himself ①with social work.For example，he is concerned ②about/for world peace and human progress.He also made it clear that his research work should ③be concerned with the farmers' income.

　view vt.看，把……视为n.风景；视野；观点

(教材P9) However，other users view avatars in a more positive light.

然而，一些人以更积极的目光看待虚拟形象。

[例1]　His views on the subject were well known.

他对这个问题的看法众所周知。

[例2]　How do you view your position within the company?

你如何看待自己在公司中的位置？

[造句]　从塔顶远眺景色蔚为壮观。

The view from the top of the tower was spectacular.

[即学即练]

①We kept the other car in view for a while，but then lost sight of it.

②Something that I had never seen before came/burst into view suddenly.

③Imagination is often viewed as the key to success.

　recommendation n．建议，提议；推荐

(教材P99)Do you have any recommendation？你有一些建议吗？

[例1]　The committee made recommendations to the board on teachers' pay and conditions.

委员会就教师的工资和工作条件问题向董事会提出建议。

[例2]　It's best to find a builder through personal recommendation.

最好通过私人介绍寻找施工人员。

[造句]　委员会的建议不大可能公开。

The committee's recommendations are unlikely to be made public.

[即学即练]

①It is such a great hotel that I would recommend it to any friend of mine who is going to Beijing.

②He recommended that we (should) see the film，Lost In Thailand.

＝He recommended us to see(see) the film，Lost In Thailand.

③It's strongly recommended that the machine(should) be repaired(repair) every year.

　admit vi.& vt.承认；接纳，容纳

(教材P99)Well，I admit it.好吧，我承认这一点。

[例1]　I must admit to feeling ashamed of my conduct.

我必须承认我为自己的行为感到羞愧。

[例2]　They freely admit (that) they still have a lot to learn.

他们坦率地承认，他们要学的东西还很多。

[造句]　你必须承认这一切听起来很古怪。

You must admit that it all sounds very strange.

[即学即练]

①It is generally admitted(admit) that contract English belongs to the frozen style，the highest level of formality.

②He admitted stealing/having stolen(steal) the bicycle.

③He was admitted to hospital suffering from burns.

Sentence Patterns

　so...that...句型

(教材P9) Some users worry that they are spending so much time in virtual worlds that they are becoming afraid of meeting people in the real world.

一些网民开始担心自己在虚拟世界沉溺太久，以至于开始害怕在现实中与人交往。

句式分析：句中包含了“so...that...”固定句型，意为“如此……以至于……”。that引导结果状语从句。

[例1]　I am so tired that I want to sleep right now.

我非常累，因此想马上睡觉。

[例2]　She is so beautiful that all boys want to make friends with her.

她如此美丽，以至于所有的男孩们都想和她做朋友。

[造句]　我妹妹年龄太小，她还不能去上学。

My sister is so young that she can't go to school．

[即学即练]

①Kathy is so lovely that we all like to play with her.

②There is so much work to do that I won't be able to take off this year.

③It was such bad weather that we stayed at home all the day.

When people started creating their own avatars，they discovered that they were going to have the power to create new identities that did not look or act like their real selves at all.

[分析]　本句是一个复合句，when引导时间状语从句；第一个that引导宾语从句，作discovered的宾语；第二个that引导定语从句，修饰先行词new identities；to create new identities作定语修饰the power。

[翻译]　当人们开始创造自己的虚拟形象时，他们发现他们能够创造一个全新的自己，这个“全新的自己”和他们真实的外表或行为完全不同。

Ⅰ.单句语法填空

1．When the football fans saw the super star，they got so excited that they cried out.

2．Each partner is viewed as the other's agent.

3．I was concerned(concern) that I was not protected and would get a sunburn.

4．It is important for us to meet personally although we have been in touch in various(vary) ways.

5．He tricked me into spending(spend) all my money.

6．He admitted stealing(steal) the necklace the day before and said he was sorry.

7．The best way of finding a lawyer is through personal recommendation(recommend)．

8．I know a lot of people who are addicted to smoking(smoke)．

9．Please send her the book at your convenience(convenient)．

10．If possible，I want to stay with you forever.

Ⅱ.短语填空

more than one；at all；more or less；in the 1980s；a variety of；become afraid of

1．Sectors in the economy can be viewed in a variety of ways.

2．In the 1980s，we surfed the changing business environment.

3．Really I had no business to be there at all．

4．More than one person has been concerned in this affair.

5．What you have done will more or less be helpful to us.

6．Fears that we don't talk about may make us become afraid of all things.

Ⅲ.课文语法填空

Some digital identities，1.known(know) as avatars，are a key part of how people use the Internet to communicate.The first simple 2D avatars appeared in 2.the 1980s.By the late 1990s，they had been used in web chats like instant messenger.Nowadays，they are everywhere.People can choose an avatar 3.from a selection of ready­made images，or create their own that can talk，walk，and fly around.

The avatar says a lot about your personality.When you choose a picture of a cute cat，you want to say，“I like relaxing and 4.having(have) fun”．Cartoon characters or laughing monkeys express “I am a really 5.funny(fun) person”．Some people make a few 6.improvements(improve) and also experiment with things like hairstyles.

Avatars let you express 7.yourself(you) and give you a lot of room for creativity.They find they have the power to create new identities 8.that did not look or act like their real selves.

But the use of avatars has caused a few concerns.Some worry that they are spending so much time in virtual worlds that are becoming afraid of 9.meeting(meet) people in real world.Some people even use avatars 10.to cheat(cheat).