牛津译林版（2019）必修 第三册Unit 1 Nature in the balance　Welcome to the unit & Reading 课件(共35张PPT)

(共35张PPT)
Unit 1
Nature in the balance
Period 1
Welcome to the unit & Reading—Reading comprehension
读前清障
精读课文
读前 清障
Ⅰ.匹配单词
1.survive　　　 A.a situation in which a plant，an animal，a way of
life，etc.stops existing
2.damage B.in or to a lower position than sb/sth；under sb/sth
3.extinction C.to continue to live or exist despite a dangerous
event or time
4.towering D.to become impossible to see
5.disappear E.extremely tall or high and therefore impressive
6.beneath F.physical harm caused to sth which makes it less
attractive，useful or valuable
1.The project about protecting wildlife had to be stopped a lack of funding.
2.Her mother taught her，and she taught her daughter.
3.It was the readers who a newspaper with their letters several years ago.
4.A tiny army of microorganisms will a jaguar’s body when it dies.
5.It may take a few weeks for you to your strength again.
Ⅱ.选词填空
in turn，build up，break down，due to，breathe life into
due to
in turn
breathed life into
break down
build up
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精读 课文
Ⅰ.明文章大意
What’s the main idea of the text
A.The Amazon rainforest is the largest rainforest in the world.
B.The Amazon rainforest gives the richest biodiversity on the Earth.
C.The Amazon rainforest is a natural treasure house on the Earth.
D.The Amazon rainforest is known as the“lungs of the planet”.
Step 1　速读——整体理解文意
√
Ⅱ.悉层次结构
Read the text quickly to match the main idea with each paragraph.
Para.1　　 A.Plant biodiversity and levels of the rainforest.
Para.2 B.Animal biodiversity and food chain.
Para.3 C.Introduction to the Amazon rainforest.
Para.4 D.The rainforest’s value to the human race and threats
to the rainforest.
Para.5 E.Basic information about the rainforest.
Ⅰ.Read Para.1 carefully and do the following exercises.
1.What’s the function of paragraph 1
A.To emphasize the importance of the Amazon rainforest.
B.To explain why the Amazon rainforest is a natural treasure.
C.To state the status of the Amazon rainforest：the largest rainforest.
D.To lead into the following paragraphs.
Step 2　细读——逐段获取细节
√
2.Welcome to the jungle，a huge sea of green alive with the sounds of animals.
(1)How do you understand the underlined part
a sea of：____________________
alive with：______________________________
a lot of；plenty of
be full of living or moving things
(2)Paraphrase this sentence.
答案　Welcome to the jungle，in which there are plenty of green plants and you can hear various sounds of animals.
3.Which word can be used to replace the word “significant” in Para.1
A.Light. B.Small.
C.Important. D.Middle.
√
Ⅱ.Read Para.2 carefully and do the following exercises.
1.Fill in the blanks.
The author writes about the ，the ，the and the
of the Amazon rainforest.
location
size
name
biodiversity
2.How does the documentary script make clear the size of the Amazon rainforest and the length of the Amazon River
答案　By making comparisons with familiar places or objects.
3.Who may be the target audience of this documentary Why
答案　It may target Chinese people.Because the author makes comparisons with China and the Yangtze River to make the audience understand the Amazon rainforest better.
4.What does the word “They” refer to in Line 10
答案　Different ecosystems supported by the Amazon River.
Ⅲ.Read Para.3 carefully and do the following exercises.
1.How does the author develop this paragraph
A.By listing numbers.
B.By giving examples.
C.By making comparisons.
D.Both A and B.
√
2.Complete the mind map about the different levels of the rainforest.
the tops of the tallest trees
towering ancient hardwoods
shorter plants with large leaves
the mass of leaf litter
Ⅳ.Read Para.4 carefully and do the following exercises.
1.How does the author develop this paragraph
答案　By giving examples.
2.What can we learn from the fourth paragraph
A.Jaguars are only one element of the forest’s food chain.
B.Jaguars feed on less than 80 species.
C.Jaguars don’t eat frogs.
D.When a jaguar dies，its body won’t be broken down.
√
Ⅴ.Read Para.5 carefully and do the following exercises.
1.What is the value of the rainforest to us
答案　The Amazon rainforest breathes life into the planet by fixing carbon and producing over 20 percent of all the Earth’s oxygen.Moreover，the Amazon rainforest is a treasure house of species that can be used for food or medicine.
2.What rhetorical device is used in this paragraph
A.Metaphor(隐喻).
B.Personification(拟人).
C.Parallelism(排比).
D.Simile(明喻).
√
3.In the sentence “Yet there is one major danger to these irreplaceable plants and animals：us.”(lines 33－34)，why “us” is used instead of “human beings” here
By using “us” instead of “human beings”，the author wants to emphasize that every one of us is for the damage to the
.Therefore，all of us have a to play in protecting it.
responsible
rainforest
part/role
4.What is the function of the question at the end of the passage
A.To introduce the topic.
B.To introduce ways to protect the Amazon rainforest.
C.To seek for answers to protect the Amazon rainforest.
D.To arouse people’s concern about the Amazon rainforest.
√
Ⅵ.Read the whole passage and do the following exercises.
1.What type of writing is the passage
A.Narrative writing.
B.Exposition.
C.Argumentation.
D.Practical writing.
√
2.What is the purpose of this documentary script
A.To advertise the Amazon rainforest.
B.To popularize(科普) the Amazon rainforest.
C.To persuade readers to protect wildlife.
D.To call for our joint efforts to protect the Amazon rainforest.
√
3.What is the author’s attitude towards the Amazon rainforest
A.Positive. B.Negative.
C.Objective. D.Indifferent.
√
1.What makes the Amazon rainforest a natural treasure？(Creative thinking)
2.What is your answer to the question at the end of the script？(Critical thinking)
Step 3　读后——讨论深度理解
The Amazon rainforest,1. is the largest rainforest in the world，plays a significant role in maintaining the fine balance of the Earth’s ecosystem.The Amazon rainforest crosses into eight countries,2.___________(include) Brazil and Peru，and one overseas region of France.The Amazon River is close to 6,400 kilometres in 3.________(long).Of the 390,000 plant species 4. (know) to humans，more than 40,000 can be found in the Amazon.The forest’s different levels support 5. unbelievable variety of wildlife.Each level of the forest forms its own little world，home to different kinds of 6. (live) things.
Step 4　总结——课文语法填空
which
including
length
known
an
living
More than 1,300 species of birds and over 400 species of mammals hide among the jungle’s plant life.The Amazon rainforest breathes life into the planet by fixing carbon and 7. (produce) over 20 per cent of all the Earth’s oxygen.Thus,8. is often known as the “lungs of the planet”.However，over the past 50 years，about 17 per cent of the rainforest 9. (disappear) due to human activities.As a result，we have to think about the question whether we can afford 10.___________(damage) the “lungs of the planet”.
producing
it
has disappeared
to damage
Step 5　解读——长句难句分析
1.The Amazon rainforest crosses into eight countries，including Brazil and Peru，and one overseas region of France，all on the South American continent.
[句式分析]　此句是 句，其中including是介词，意指“_________”；若将此句改为Brazil and Peru，and one overseas region of France (include)，空处应填 。all on the South American continent是______________作状语。
[自主翻译]　___________________________________________________
_______________________________________________________________
简单
包含，包括
included
亚马孙雨林穿过包括巴西、秘鲁在内的八个国家，以及一块法国的海外领地，都位于南美洲大陆。
独立主格结构
2.The Amazon River，from which the rainforest gets its name，is close to 6,400 kilometres in length—roughly 100 kilometres longer than the Yangtze River.
[句式分析]　此句是 句，其中from which the rainforest gets its name
是“介词＋which”引导的 定语从句，修饰先行词_________
______________。
[自主翻译]　___________________________________________________
_______________________________________________________________
复合
非限制性
亚马孙雨林得名于亚马孙河，亚马孙河长约6 400千米，比长江还长大约100千米。
The
Amazon River
3.While a significant number of jaguars survive here，they are only one element of this forest’s food chain.
[句式分析]　此句是 句，While引导 从句，意为“_____
_______”。
[自主翻译]　___________________________________________________
_______________________________________________________________
复合
让步状语
尽管这里生存着数量可观的美洲豹，但它们仅仅是雨林食物链的一环。
虽然，
尽管
4.As the impact of human activities continues to grow and the list of species in danger of extinction becomes longer，we are left with a question：can we afford to damage the “lungs of the planet”？
[句式分析]　此句为 句。As引导 从句；we are left with a question 是 ；can we afford to damage the “lungs of the planet”作a question的 。
[自主翻译]　___________________________________________________
_______________________________________________________________
复合
时间状语
主句
同位语
随着人类活动影响的不断增加，濒危物种的名单越来越长，这就留给我们一个问题：我们能承担得起损害“地球之肺”的后果吗？
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本课结束