大学体验英语英语视听说教程3u1.pptx

大学体验英语英语视听说教程3U1会计学第2页/共65页 Nothing is more terrible than ignorance in action.Desiderius Erasmus第3页/共65页AgendaBackground InformationHome listeningUnit OverviewLesson 1Lesson 2Supplementary Reading第4页/共65页Unit Overview Although animal extinction is part of the natural cycle, if all the species disappeared leaving only us humans behind, the human race would not be able to survive. The rapid urbanization of cities in modern times poses a great threat to the existence of some animals. Along with the loss of the natural habitats, man-made activities add fuel to the flames, accelerating the rate at which species disappear. In this unit, endangered animals in America and other countries will be introduced. Students will get to know the current situation of some animal species through reading, listening and viewing. Various activities will inspire students to talk about human’s impact on nature by using the wordsand expressions in this unit. Finally, they will conduct a poll on “college students’ awareness of endangered species in China” with their peers.第5页/共65页Background Information Industrialization, economic development and population pressure have in the past two centuries combined to result in a rapid loss of biological diversity and an acceleration in the number of species disappearing from the face of the earth. According to the IUCN (World Conservation Union), in the last 500 years human activity has forced 816 species to extinction. As biological diversity is lost, we also lose the possibility of tapping as yet unknown resources for agriculture, industry, and health care. China’s biological resources are among th e world’s richest. This is not only due t o its size, but also due to the tremendous diversity of habitats it provides for wild plants and animals. The world’s highest and lowest points are in Chinese territory, and it has a variety of ecosystems that is unequalled else where, from glaciers t o coral reefs, from deserts to tropical rainforests. As a resu