（2021新教材）牛津译林版必修第三册英语 unit 1 Welcome to the unit & Readingppt课件.pptx

1、Unit 1 Nature in the balance Welcome to the unit levels of the rainforest Animal biodiversity; food chain The rainforests value to the human race; threats to the rainforest 1. Whats the main idea of the passage?1. Whats the main idea of the passage? A. The Amazon rainforest is the largest A. The Ama

2、zon rainforest is the largest rainforest in the world.rainforest in the world. B. The Amazon rainforest gives the richest biodiversity on the earth. C. The Amazon rainforest is a natural C. The Amazon rainforest is a natural treasure house on the earth.treasure house on the earth. D. The Amazon rain

3、forest is known as D. The Amazon rainforest is known as the “lungs of te planet.”the “lungs of te planet.” Reading Reading for specific information 8 6 million 6,400 40,000 1,300 400 20% 17% Read para. 3 carefully and try to understand the rainforests different levels. Of the 390,000 plant species k

4、nown 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 forests different levels support an unbelievable variety of wildlife. At the bottom, there is a system of roots beneath

5、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 lit

6、tle world, home to different kinds of living things. a system of roots The forests 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 2. Which can be inferred from the 3rd 2.

7、Which can be inferred from the 3rd paragraph from the passage?paragraph from the passage? A. There are only 390,000 species of plants A. There are only 390,000 species of plants on the earthon the earth B. Different species of plants in Amazon B. Different species of plants in Amazon rainforest grow

8、 in different levelsrainforest grow in different levels C. At the bottom of the Amazon rainforest C. At the bottom of the Amazon rainforest grow some bushesgrow some bushes D. The ancient brazil nut trees and the water D. The ancient brazil nut trees and the water lilies are growing in the same leve

9、llilies are growing in the same level Read para. 4 carefully and try to understand the food chain. More than 1,300 species of birds and over 400 species of mammals hide among the jungles plant life. This jaguar is one example. It has a yellowish-brown coat with black spots. While a significant numbe

10、r of jaguars survive here, they are only one element of this forests 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 microorganisms helps break down its body and return the nutrients t

11、o the earth. Jaguars Insects At least 87 species, including frogs Leaves and fruit Microorganisms While a significant number of jaguars survive here, they are only one element of this forests food chain. 3. The author uses the example of 3. The author uses the example of “jaguars” in paragraph 4 “ja

12、guars” in paragraph 4 . . A. to prove that some rare animals are A. to prove that some rare animals are still found in the rainforeststill found in the rainforest B. to show that they are only one B. to show that they are only one element of the rainforest food chainelement of the rainforest food ch

13、ain C. to explain how the food chain is C. to explain how the food chain is formedformed D. to warn readers to protect the D. to warn readers to protect the animals from being damaged in the animals from being damaged in the rainforestrainforest 4. Which of the following statement about 4. Which of

14、the following statement about Amazon rainforest is Amazon rainforest is TRUETRUE according to the according to the passage?passage? A. The Amazon rainforest plays an important A. The Amazon rainforest plays an important part in keeping the balance of human and part in keeping the balance of human an

15、d nature.nature. B. The Amazon rainforest crosses into seven B. The Amazon rainforest crosses into seven countries, including Brazil and Peru.countries, including Brazil and Peru. C. The area of the Amazon rainforest is about C. The area of the Amazon rainforest is about 6 million squre meters, more

16、 than half size of 6 million squre meters, more than half size of Chian.Chian. D. The Amazon rainforest is named after the D. The Amazon rainforest is named after the Amazon river, which is close to 6400 Amazon river, which is close to 6400 kilometers in length.kilometers in length. Today ,rain fore

17、sts are threatened (威胁威胁) by such things as acid rain from factory smoke emissions (散发散发) around the world and from farm expansion(扩张扩张) . A lot of rain forests are burned or cut down each year. Can we afford to damage the “lungs of the planet”? If no, what should we do? Discussion Government should

18、 do School should do Students should do Can we afford to damage the “lungs of the planet”? What should we do? Firstly, the government should enhance(增强) the citizens awareness of rainforest protection and establish nature reserves. In addition, the school should strengthen environmental education and set up a bulletin board(公告栏). Last but not least, we students should . Read the documentary script again and underline the difficult points that you cannot understand. Homework