人教版九年级下册 Unit 13 We're trying to save the earth! Section A 3a-3b 课件(共19张PPT)

(共19张PPT)
Unit 13
We are trying to save the earth!
To learn some key words and useful expressions
To learn something about endangered animals -- sharks.
sharks
shark fin soup
鲨鱼，生活在海洋中，是海洋中最凶猛的鱼类。
鲨鱼早在恐龙出现前三亿年前就已经存在地球上，至今已超过五亿年，它们在近一亿年来几乎没有改变。鲨鱼，在古代叫作鲛、鲛鲨、沙鱼，是海洋中的庞然大物，所以号称"海中狼"。还有鲸鲨，大白鲨。目前因为有大多数人认为鲨鱼的软骨(即鱼翅)中蛋白质很高，但这是错误的。鸡蛋的蛋白质远远超过鱼翅。因为人类错误的观念，鲨鱼几十年来被大量猎杀，专家分析再这样下去，鲨鱼将绝种，请保护好鲨鱼。吃鱼翅是可以的，但它对人体有害，因为鲨鱼翅中含有一定量的神经毒素。
Sharks are in danger. Let's help save the sharks!
1.听说
2.一碗鱼翅汤
3.切掉
4.对......有害的
5.在......顶部或顶端
6.食物链
7.在海洋生态系统中
8.科学研究
9.迄今为止
10.环境保护组织
hear of
a bowl of shark fin soup
cut off
be harmful to
at the top of
the food chain
in the ocean's ecosystem
scientific studies
so far
environmental protection groups
Read the passage about sharks and find out the phrases. (2 minutes)
Many people do not realize they are killing a whole
shark _____they enjoy a bowl of shark fin soup.
2. Sharks are at the top of the food chain, ___ if their numbers drop, the ocean’s ecosystem will be in danger.
3. Many think that sharks are too strong to be
endangered, _____ they are wrong.
4. _______ there are no scientific studies to support this, a lot of people believe that shark fins are good
for health.
5. Sharks may disappear one day ______ we do not
do something to stop the sale of shark fins.
Read the passage again and fill in the blanks with the words in the box.
so although if but when
so
when
3b
but
Although
if
Read it carefully and answer the questions.
1. Where is shark fin soup especially popular according to the passage
In southern China .
2. What do people do when they catch sharks
They cut off their fins and throw the shark back into
the ocean.
3. Can a shark swim without a fin
No, it can't swim any longer and slowly dies.
4. How many sharks are caught and traded in this industry
every year
Around 70 million.
5. Have scientific studies shown shark fins are good for
health
No, they haven't.
1. This method is not only cruel, but also
harmful to the environment.
2. Not only you but also he has to leave.
3. Not only does the sun give us light,
but also it gives us heat.
not only…but also…
用于连接两个表示并列关系的成分，着重强调后者，其意为“不仅……而且……”; 其中的also有时可以省略。
若连接两个成分作主语，其谓语通常与靠近的主语保持一致。
not only放在句首，后接句子时要用倒装结构。
Many have ______ (hear) of shark fin soup. This
famous and expensive dish is _________(especial)
popular in southern China. But do you realize
that you’re ______ (kill) a whole shark each time
you enjoy a bowl of shark fin soup
When people catch sharks, they ______off their
fins and throw the shark back into the ocean.
This is not only ______ , but also harmful ____ the
environment.
Fill in the blanks according to the passage.
heard
especially
killing
cut
cruel
to
_______ a fin, a shark can no longer swim and slowly dies. Sharks are at the top of the food chain in the ocean’s _________ . If their numbers drop too low, it will bring _________ (dangerous) to all ocean life. Many believe that sharks can never be endangered because they are the _______ (strong ) in their food chain.
Without
ecosystem
danger
strongest
But in fact, around 70 million sharks are ______ (catch) and _______ (trade) in this industry every year. The numbers of some kinds of sharks have _______ (fall) by over 90 percent in the last 20 to 30 years.
caught
traded
fallen
___________ (environment) protection groups
around the world, such as Wild Aid and the WWF,
are teaching the public about “_______” (fin).
They have even asked governments to develop
______ (law) to stop the sale of shark fins. So far,
no scientific studies __________ (show) that shark
fins are good for health, so why eat them Help
save the sharks!
Environmental
finning
have shown
laws