外研版 (2019)选择性必修 第一册Unit 5 Revealing nature图文ppt课件

阅读P56－57教材课文，选择最佳选项。

1．The recent scientific studies have shown that plants can ________．

A．communicate with other living things in a chemical way when being eaten by an insect

B．hardly react to the chemicals the neighbour released

C．can release some chemicals from the leaves that are being eaten to drive the insects away

D．call the wasps to kill the insects that are eating their leaves

2．What can we infer from Paragraph 4?

A．People can't hear the noise created by the plants because we can't use sound to communicate with them.

B．All the plants can make noises with their roots.

C．Only chilli plants can tell if a neighbour plant is helpful or unfriendly.

D．When some plants make clicking noises，perhaps it suggests drought is coming.

3．How do you think the plants link with each other in a forest?

A．They can keep linked by cables and satellites like the Internet we use.

B．They have an amazing system of communication called “wood wide web”．

C．They are linked underground by their roots.

D．They use the fungal network to share information and food but they can't attack others like our own Internet.

4．What might be the author's purpose in writing the text?

A．To tell us the importance of talking plants.

B．To convince people that talking plants are only a thing of myths and legends.

C．To introduce some ways in which plants communicate.

D．To tell the readers how to communicate with plants.

5．The text is likely to appear in ________．

A．a newspaper advertisement

B．a diary

C．a science magazine

D．a guidebook

[答案]　1—5　ADBCC

Words and Phrases

知识要点1　blame v．责怪，指责；把……归咎于n.(坏事或错事的)责任；责备

(教材P53)　The extinction of the Pinta Island tortoise is blamed on humans.

平塔岛龟的灭绝要归咎于人类。

[例]　How can I blame him？It wasn't intentional.

我怎么能怪他呢？那又不是有意的。

[即学即练]　单句语法填空/完成句子

①Some people blame the smartphone for the tragedy，yet in fact people's weakening self­control and self­discipline are to blame (blame)．

②Don't always blame your own failure on others.You should take the blame for it.

③The woman passenger and the bus driver are to blame for the serious accident.

女乘客和公共汽车司机都应对这次严重事故负责。

[小片段填空]

He was blamed for the serious mistake，but he blamed it on others.In fact，it is he，not others，that is to blame for it.

他因这个严重错误受到了责备，但他把它归咎于别人。事实上，是他，而不是别人，应对此负责任。

知识要点2　decline vi.下降；减少；衰退；拒绝；谢绝n.下降；衰退；衰退期

(教材P53)　After goats in particular had been brought to the island，the Pinta Island tortoise population declined.

特别是山羊被带到岛上后，平塔岛龟的数量下降了。

[例]　The company reported a small decline in its profits.

公司报告其利润略有减少。

[即学即练]　单句语法填空/完成句子

①With all doctors' efforts，the total number of patients has been on the decline，now many mobile cabin hospitals(方舱医院)have been shut down.

②Government spending this year is estimated to decline by approximately 2%.

③The town fell into a decline after the mine closed.

④When asked for comment，the spokesperson declined to say/saying anything about the matter.

当被问及评论时，发言人拒绝对此事发表任何评论。

知识要点3　be native to源于……的，原产于……

(教材P55)　Look at the pictures of the species native to different regions of China.

看这些图片，这些物种原产于中国的不同地区。

[例]　The tiger is native to India.

这种虎产于印度。

[即学即练]　单句语法填空/完成句子

①By studying the bones，scientists further concluded that Waitaha penguin was once a native of New Zealand.

②Many rare animals and plants are native to this small island.

③China is our native country，and Chinese is our native language．

中国是我们的祖国，汉语是我们的母语。

知识要点4　detect v．发现，察觉(尤指不易察觉到的事物)

(教材P56)　When another bean plant detects the chemicals from its injured neighbour，it starts to release its own，different chemicals.

当另一棵豆秧察觉到从它受伤的邻居身上释放出的这些化学物质时，它开始释放自己的不同化学物质。

[例]　The dentist detected no decay in her teeth.

牙科医生检查了她的牙，没有发现龋齿。

[即学即练]　单句语法填空/完成句子

①Last year the detection(detect) rate for car theft was just 13%.

②The detective(detect) was trying to winkle information out of her.

③The boy was detected stealing(steal) apples from the orchard.

④By flying low，the plane avoided/escaped detection by enemy radar.

那架飞机低空飞行，以免被敌人的雷达发现。

知识要点5　link vt.&n.把……联系起来；连接

(教材P57)　 This fungal network links the roots of different plants to each other.

这种真菌网络把不同植物的根相互连接起来。

[例]　Scientists wonder whether there is a link between the two species.

科学家想知道这两个物种之间是否有关联。

[即学即练]　单句语法填空/完成句子

①We should link theory with practice.

②The two spacecraft will link up in space.

③He believed that these creatures are linked to a common ancestor，an animal that lived in Asia some 300，000 years ago.

他认为，这些动物与一个共同的祖先相关联，该动物生活在约30万年前的亚洲。

Sentence Pattern

重点句式　be said to据说……

(教材P56)　Alexander the Great and Marco Polo were said to have visited such a tree in India.

据说亚历山大大帝和马可·波罗曾在印度参观过这样一棵树。

句式分析：sb./sth. is said...是一个被动语态的谓语形式，常译为“据说……”，此结构中被动语态的谓语动词后总是跟一个不定式。

[例1]　He was said to have lost his will to live.

据说他已经失去了生存的意志。

[例2]　They are said to control large parts of the east and south of the country.

据说他们控制了该国东部和南部的大片地区。

[即学即练]　单句语法填空/同义句转换

①He is said to be writing (write) another novel about the same theme.

②She is said to have gone (go) abroad.

③America is reported (report) to declare war on Iran likely.

④It is reported that over 50 people lost their lives in the big fire.

→Over 50 people are reported to have lost their lives in the big fire.

排序题

排序题要求考生根据事件发生的先后顺序和句子之间的逻辑关系，找出事件发生、发展的正确顺序，解题方法可采用“首尾定位法”。即先找出第一个事件和最后一个事件，迅速缩小选择范围，从而快速选出正确答案。

[例文]

Marc was an unusual child even as a baby.At just six months of age，he would sit through a two­hour classical music concert.By the time he was two，he started to read and sing Beethoven symphonies (交响曲)．While his mother thought this was unusual，she did not realize his musical gifts until he was at a friend's party and started to play a nursery rhyme on the piano.

With lessons from his mom and then a professional teacher，Marc's skills improved a lot.By the time he was five，he had learned another musical instrument—the cello(大提琴)．When he was just six and a half，he picked up a famous prize—the Davidson Fellowship in Music，which is usually given to musicians 18 or older.

After making his orchestra debut (初次演出)at the age of six，there has been no looking back for this musical genius.He is always travelling，either to perform at concerts or for piano lessons.

Which of the following is the CORRECT order to describe Marc's music career according to the text?

a．He began to learn the cello.

b．He made his orchestra debut.

c．He won the Davidson Fellowship in Music.

d．He started to read and sing Beethoven symphonies.

e．He could sit through a two­hour classical music concert.

A．e­a­b­d­c B．e­d­a­b­c

C．b­c­e­d­a  D．e­d­a­c­b

[解析]　根据第一、二、三段中的时间点“six months of age，he was two，he was five，he was just six and a half，at the age of six”可知。

[答案]　B

[即学即练]　请快速排出下列事件的正确顺序

A schoolgirl saved her father's life by kicking him in the chest after he suffered a serious allergic (过敏的)reaction which stopped his heart.

Izzy，nine，restarted father Colm's heart by stamping(踩)on his chest after he fell down at home and stopped breathing.

Izzy's mother，Debbie，immediately called 999 but Izzy knew doctors would never arrive in time to save her father，so decided to use CPR.

However，she quickly discovered her arms weren't strong enough，so she stamped on her father's chest instead.

What's the right order of the events?

①Izzy kicked Colm.　②Debbie called 999.　③Izzy learned CPR.　④Colm's heart stopped.

A．③①②④ B．④②③①

C．③④②① D．④③①②

[答案]　　C