Biological diversity has never been so threatened as it is today as a result of the process of human civilization. The various forms of pressure created by human activity have destroyed natural balance, led to the deterioration of natural habitats, genetic erosion and the rarity, even disappearance, of a number of plant and animal species.
As the pace of civilization accelerates, more people, taking more space, needing to use more natural resources, engaging in ever-growing consumption, impose severe deterioration on the habitat of animals. An increasing number of people come to realize that the disappearance of animals will result in serious threat to the equilibrium of ecosystem. Simply put, the extinction of hawks, a rat-eating bird seen in many regions, will result in the rapid propagation of rats. And rats, further, will destroy the prairies and threaten the other animals like gazelles, zebras and others, who live on grass and green lands. The coexistence of animals and human beings creates perfect harmony and brings about the vividness to our planet.
It is hard to imagine what our world would be like without animals. Sociologists also point out that the disappearance of animals can cause social and economic problems. Animal trade, as a supporting sector to the world economy, was very active before. However, the situation is beyond control since animal trade is very profitable and alluring. Many species cannot escape the adversity of being killed.
Certainly, our diet cannot be without meat. There are living stocks, which can provide us with sufficient and nutritious produce. Therefore, we need not to resort to wild animals, especially the endangered ones. To protect animals is to protect our living environment. Every individual should join efforts to keep the diversity of animals.
2015秋冀教版英语八上Unit 6《Lesson 33 Life on Wheels》word导学案
2015秋冀教版英语八上Unit 7《Lesson 37 What’s Your Hobby》word英文学案
2016春冀教版英语八下Unit 4《Lesson 19 How Do You Use the Internet》word教案
2015秋冀教版英语八上Unit 7《Lesson 39 Danny’s Hobby》word导学案
2016春冀教版英语八下Unit 3《Lesson 17 Save the Tigers》word教案
2016春冀教版英语八下Unit 4《Lesson 20 A computer Helps》word导学案
2015秋冀教版英语八上Unit 8《Lesson 43 What Makes You Unique》word导学案
2015秋冀教版英语八上Unit 6《Lesson 34 Flying Donuts》word导学案
2015秋冀教版英语八上Unit 8《Lesson 45 Be Yourself》word导学案
2015秋冀教版英语八上Unit 7《Lesson 42 The New Club》word导学案
2015秋冀教版英语八上Unit 7《Lesson 38 Hobbies Are Fun》word英文学案
2015秋冀教版英语八上Unit 1《Me and My Class》(Lessons 1、2)学案
2015秋冀教版英语八上Unit 7《Lesson 40 What’s Paul’s Hobby》word导学案
2016春冀教版英语八下Unit 3《Lesson 17 Save the Tigers》word导学案
2015秋冀教版英语八上Unit 7《Lesson 40 What’s Paul’s Hobby》word英文学案
2015秋冀教版英语八上Unit 6《Go with Transportation》(Lesson 36)英文学案
2016春冀教版英语八下Unit 4《Lesson 19 How Do You Use the Internet》word导学案
2015秋冀教版英语八上Unit 8《Lesson 48 Li Ming’s Report》word导学案
2015秋冀教版英语八上Unit 6《Lesson 36 Clean Cars》word导学案
2016春冀教版英语八下Unit 4《Lesson 22 Travel on the Internet》word导学案
2016春冀教版英语八下Unit 3《Lesson 18 Friendship Between Animals》word导学案
2015秋冀教版英语八上Unit 6《Lesson 32 Trains Go Faster》word导学案
2016春冀教版英语八下Unit 3《Lesson 16 The Pear Escaped》word导学案
2016春冀教版英语八下Unit 4《Lesson 21 Books of Computers》word导学案
2016春冀教版英语八下Unit 3《Lesson 18 Friendship Between Animals》word教案
2015秋冀教版英语八上Unit 7《Lesson 41 Show and Tell》word导学案
2015秋冀教版英语八上Unit 7《Lesson 41 Show and Tell》word英文学案
2015秋冀教版英语八上Unit 7《Enjoy Your Hobby》word课文重点整理
2015秋冀教版英语八上Unit 6《Lesson 31 How Do You Travel》word导学案
2016春冀教版英语八下Unit 4《Lesson 20 A Computer Helps》word教案
| 不限 |
| 英语教案 |
| 英语课件 |
| 英语试题 |
| 不限 |
| 不限 |
| 上册 |
| 下册 |
| 不限 |