牛津译林版（2019）必修第三册Unit 1 Nature in the balance Reading 课件（共47张PPT，内嵌视频）

(共47张PPT)
Unit 1 Nature in the balance
Reading
Pre-reading
Do you know where it is
The Amazon / m z n/ rainforest
What do you think of the Amazon rainforest
The Amazon rainforest:
a natural treasure
The Amazon rainforest
Predicting : What does the passage talk about
animals
significance/
value
plants
danger
location
I. Read and match the main idea of each paragraph.
Fast-reading
Welcome to the jungle , a huge sea of green alive with the sounds of animals. This is the Amazon rainforest. As the largest rainforest in the world, it plays a significant role in maintaining the fine balance of the Earth’s ecosystem.
/ d ɡl/
/ la v/
/s ɡ n f k nt/
/me n te n/
/ b l ns/
/ i k s st m/
Detailed-reading
Para.1
The tree is alive with birds.
She does not know if he is alive or dead..
Welcome to the jungle, a huge sea of green alive with the sounds of animals.
be filled with
be full of
As the largest rainforest in the world, it plays a significant role in maintaining the fine balance of the Earth's ecosystem.
As students, we need to study hard.
...plays a significant role in sth/ doing sth
maintain/keep the balance of sth/ between A and B
/ d ɡl/
/ la v/
/s ɡ n f k nt/
/me n te n/
/ b l ns/
/ i k s st m/
What is the status of the Amazon rainforest
Para.1
The Amazon rainforest crosses into eight countries, including Brazil and Peru, and one overseas region of France, all on the South American continent. With the area of around 6 million square kilometers, the Amazon rainforest is more than half the size of China. The Amazon River, from which the rainforest gets its name, is close to 6,400 kilometers in length——roughly 100 kilometers longer than the Yangtz River. On its journey from the mountains to the ocean, the river supports many different ecosystems. They give this area the richest biodiversity on the Earth: one in ten known species in this world can be found here.
/kr s/
/br zil/
/p 'r /
/ ri d n/
/ k nt n nt/
/skwe (r)/
/ spi i z/
/ bai udai v :s ti/
/'j tsi/
/s p t/
/ r fli/
/'kil mi:t (r)/
/fr ns/
/'e r /
/ m lj n/
/hɑ f/
/le θ/
/'d n /
/ n/
Para.2
The Amazon rainforest crosses into eight countries, including Brazil and Peru, and one overseas region of France, all on the South American continent.
With the area of around 6 million square kilometers, the Amazon rainforest is more than half the size of China.
The Amazon River, from which the rainforest gets its name, is close to 6400 kilometres in length--- roughly 100 kilometres longer than the Ynagtze River.
The rainforest gets its name from the Amazon River.
定语从句中，当先行词指物，关系代词前有介词时，只能用which.
The man, with ________ he is talking, is his brother.
当先行词指人，关系代词前有介词时，只能用whom.
On its journey from the mountains to the ocean, the river supports many different ecosystems. They give this area the richest biodiversity on the Earth: one in ten known species in this world can be found here.
Of the 390,000 plant species known to us, more than 40,000 can be found in the Amazon. This tall and ancient brazil nut tree produces nuts that we can eat; these water lilies are big enough to lie down on. The forest’s different levels support an unbelieveable variety of wildlife. At the bottom, there is a system of roots beneath the ground. Above that is the mass of leaf litter on the dark forest floor. The next level is made up of shorter plants with large leaves. Then there are the towering ancient hardwoods, and finally the tops of the tallest trees many metres above the ground. Each level of the forest forms its own little world, home to different kinds of living things.
/n t/
/ nb 'li v b( )l/
/v ra ti/
/ b t m/
/b ni θ/
/m s/
/'l t /
/'ta /
/'e n ( )nt/
/ l li/
/ levl/
/ s st m/
/gra nd/
Para.3
Of the 390,000 plant species known to us, more than 40,000 can be found in the Amazon.
This tall and ancient brazil nut tree produces nuts that we can eat; these water lilies are big enough to lie down on.
The forest’s different levels support an unbelieveable variety of wildlife. At the bottom, there is a system of roots beneath the ground.
Above that is the mass of leaf litter on the dark forest floor.
表语前置，above在句首引起完全倒装
介词短语作后置定语
正常语序：The mass of leaf litter on the dark forest floor is above that.
翻译：往上是阴暗森林地表厚实的落叶层
The next level is made up of shorter plants with large leaves. Then there are the towering ancient hardwoods, and finally the tops of the tallest trees many metres above the ground.
此处省略了“there are”
Each level of the forest forms its own little world, home to different kinds of living things.
How many levels of the forest are mentioned
Can you find some key words
At the bottom...
Above...
The next level is..
Then...
And finally...
Para.3
a system of roots
The forest’s different levels support an unbelievable variety of wildlife.
the tops of the
tallest trees
the mass of leaf litter
shorter plants with large leaves
towering ancient hardwoods

There are _______ levels of plant species.
5
More than 1,300 species of birds and over 400 species of mammals hide among the jungle’s plant life. This jaguar is one example. It has a yellowish-brown coat with black spots. While significant number of jaguars survive here, they are only one of element of this forest’s food chain. They feed on at least 87 species, including frogs. These frogs, in turn, feed on insects which eat leaves and fruit. When a jaguar dies, a tiny army of microorganism helps break down its body and return the nutrients to the earth.
/ m ml/
/'d gj /
/sp t/
/s va v/
/ el m nt/
/fi d/
/fr ɡ/
/ nsekt/
/'ta n /
/ ɑ mi/
/ma kr ' g( )n z( )m/
/ nju tri nt/
Para.4
More than 1,300 species of birds and over 400 species of mammals hide among the jungle’s plant life. This jaguar is one example. It has a yellowish-brown coat with black spots.
While a significant number of jaguars survive here, they are only one element of this forest’s food chain.
while引导让步状语从句时，通常放句首，译为“尽管，虽然”。
while的其他用法：
1）It began to rain while the farmer was selling his produce.
2)He likes football,while I prefer basketball.
当这个农民正在卖农产品时，天开始下雨了。
他喜欢足球，而我更喜欢篮球。
此处while引导时间状语从句，译为“当......时候；与......同时”
此处while连接前后两个并列分句，表示对比，译为“而，然而”
They feed on at least 87 species, including frogs. These frogs, in turn, feed on insects which eat leaves and fruit. When a jaguar dies, a tiny army of microorganism helps break down its body and return the nutrients to the earth.
Read Paragraph 4 and complete the following chart about the food chain in the rainforest.
nutrients in the earth
insects
leaves and fruits
frogs
jaguars
microorganisms
The forest’s food chain
Para.4
The Aamzon rainforest breathes life into the planet by fixing carbon and producing over 20 per cent of all the Earth’s oxygen. Thus, it is often known as the “lungs of planet”. Moreover, the Amazon rainforest is a treasure house of species that can be used for food or medicine. Yet there is one major danger to these irreplaceable plants and animals: us. Over the past 50 years, about 17 per cent of the rainforest has disappeared due to human activities such as agriculture and cattle farming. 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 ”
/ kɑ b n/
/ ks d n/
/l /
/ r 'ple s b( )l/
/ d s p (r)/
/ ɡr k lt (r)/
/ k tl/
/ fɑ m /
/ mp kt/
/k n't nju /
/ k st k n/
/ f d/
/ d m d /
/bri /
/ pl n t/
/f ks/
Para.5
The Aamzon rainforest breathes life into the planet by fixing carbon and producing over 20 per cent of all the Earth’s oxygen. Thus, it is often known as the “lungs of planet”.
Moreover, the Amazon rainforest is a treasure house of species that can be used for food or medicine.
Yet there is one major danger to these irreplaceable plants and animals: us. Over the past 50 years, about 17 per cent of the rainforest has disappeared due to human activities such as agriculture and cattle farming.
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 ”
Answer the questions:
1.What's the significance of the rainforest
2. What is the major danger to the plants and animals
the “lungs of the planet”
a treasure house of species
food and medicine materials
major danger :us / human beings
About 17% of the rainforest has disappeared due to human activities.
Para.5
8
6 million
6,400
40,000
1,300
400
20%
17%
Read again and finish A2 on page 4
Summary
significant
eight countries
6 million
6,400 kilometres
biodiversity
40,000
ancient brazil nut tree
water lilies
1,300
400
element
20%
17%
Discusion
Are there any places with rich biodiversity like the Amazon rainforest in China
What are they Introduce one to the class.
我国最大的原始森林-大兴安岭。大兴安岭是兴安岭的重要组成部分，也是我国现存保护完好、面积最大的原始森林，由于大兴安岭地处我国北极，属于高寒气候，所以这里的变温动物（爬行、两栖等等）较少，主要以哺乳类和鸟类为主。
第二个是神农架。神农架虽然面积没有大兴安岭那么大，但它却是我国最“神秘”的原始森林。由于人迹罕至，勘测困难，这里从古至今都笼罩着一股神秘色彩，野人传说、水怪传说、白化动物鬼市等等，由于地理位置因素，神农架的生物多样性也远远超过大兴安岭。
第三个是尖峰岭热带雨林。尖峰岭热带雨林是我国现存最大的热带雨林，没有之一，它位于海南省三亚市。尖峰岭热带雨林森林覆盖率高达96％，生物种类也极为丰富，有2800多种植物和超过4000种不同的动物。由于生物资源丰富，这里也被称为是我国天然的基因库。
最后是波密岗乡林芝云杉林。位于西藏波密县城扎木镇以西，高海拔的特点决定了这里的植被覆盖率较低，只有61％左右，但是植物种类却不少，超过了2000种，是名副其实的“植物宝库”。
地球在中国的四个肺
________ the largest rainforest in the world, it plays ________ significant role in maintaining the fine balance of the _________(Earth) ecosystem.
The Amazon River, from ________ the rainforest gets its name, is close to 6400 kilometres ______ length.
One in ten ________(know) species in the world can be found here.
These water lilies are big enough ________(lie) down on.
The forest’s different levels support an ____________(believe) variety of wildlife.
Unit 1
As
Earth’s
which
known
Text Review
unbelievable
to lie
an
in
6. Then there are the ________(tower) ancient hardwoods.
7. Each level of the forest forms its own little world, home _______ different kinds of living things.
8. They feed _____ at least 87 species, ________(include) frogs.
9.Yet there is one major danger to these __________(replace) plants and animals: us.
10. Over the past 50 years, about 17 percent of the rainforest _______________(disappear) due to human activities.
towering
on
to
including
irreplaceable
has disappeared
11. As a result, most of the forest’s nutrients are locked up in the plants themselves, thus _________(allow) them to grow _______an unbelievable speed.
allowing
at
variety
agriculture
survive
impact
due to
are broken down
beneath
thus