小组展示ppt课件

1、；.,1,Changes in the Balance of Nature,第四小组：,；.,2,Main idea of this passage,；.,3,Questions：,1.Where can you find the information about the formation and development of the Earth? 2. When was the Earth formed? 3. When did the first human beings walk the Earth? 4. Which section is about mens control ov

2、er natural resources? 5. Which section is about the balance of nature?,；.,4,1.Where can you find the information about the formation and development of the Earth? Key 2. When was the Earth formed? Key,In Paras 3-5.Read the first sentence of each of these paragraphs.,5 billion years ago (Para. 3),；.,

3、5,3. When did the first human beings walk the Earth? Key 4. Which section is about mens control over natural resources? Key,3 million years ago (Para. 4),Section 2 notice its spacing and its headline,；.,6,5. Which section is about the balance of nature? Key,Section 3 notice its spacing and its headl

4、ine,；.,7,subtitles,Perceptions are relative.,People try to control resources.,The balance of nature,Human beings have just arrived.,People create a drain on resources that cant be renewed.,All natural systems tend toward balance among opposing factors or forces.,；.,8,Focus Study,1.A single tree may

5、seem large compared to person. 现在分词短语作状语，表被动意义,compared to,；.,9,2.As the number of people on Earth increases，it becomes increasingly difficult for the population to survive on the resources of the land.,it + be/becomes + adj + for sb. to do sth,；.,10,Perceptions are relative. L. 1 In other words, th

6、ings in nature are large or small, new or old, only in accordance with measures and the comparisons involved. L. 3,the process of perceiving 感知，感觉,Difficult sentences,；.,11,The Earth was formed about five billion years ago from a rotating, circular cloud of dust and gases such as hydrogen and nitrog

7、en. L. 7,Difficult sentences,；.,12,Difficult sentences,In terms of the evolution of life on Earth, human beings have just arrived. L. 22,with regard to; concerning 就而论,；.,13,Difficult sentences,Yet people in rich nations use proportionally far more of the available resources than people in poorer na

8、tions. L. 39,People have brought about enormous changes to the surface of the planet - changes far out of proportion to the interval of time they have occupied it. L. 23,in proportion to 成比例的,；.,14,Difficult sentences,As an outcome of their hunger for empires, the Earth was abused. L. 74,abuse: v./n

9、.1. 滥用，妄用 2. 虐待,Now that they are no longer ignorant of the causes of the sickness of our planet, they seek ways to help the Earth, to give back what they take away. L. 76,；.,15,Useful expressions,out of proportion L. 22 survive onL. 29 in harmony withL. 55 take advantage ofL. 64 hunger for sth.L. 65 live withL. 66 be ignorant ofL. 67 give backL. 67 take awayL. 68,不成比例的 以为生 与相配 利用 对的渴望 接受，容忍 不知道 归还 拿走,；.,16,Old to New,；.,17,；.,18,Chinese to English,；.,19,；.,20,We are thinking:,Everyone must protect planet Earth, a planet in danger.,