国际交流英语视听说B4U6(外研社)重点.ppt

Listening 1 Big Yellow Taxi: a song which was written and recorded in 1970 by Joni Mitchell, a Canadian musician. It is known for its lyrics which describe the natural environment being destroyed by human urban development. 《 大黄出租车》 Listening 1 Research Institute of Organic Agriculture: a scientific institute. It was founded in Switzerland in 1973 by scientists and farmers. It aims to advance science in the field of organic agriculture, and has projects around the world. 有机农业研究所 Listening 1 Professor Steve McLaskey of the Maharishi University of Management carries organic vegetables from the university greenhouse to the cafeteria. Listening 1 Before scientists discovered it was dangerous, DDT was used as a pesticide. A | Read the sentences. Then listen to a talk about DDT and answer the questions by completing the sentences. Listening 1 1. What is a pesticide? It’s a chemical that farmers spray on their growing crops to ____________________________________. 2. Was DDT eliminated from the environment after it was found harmful to humans and animals? No. It _____________ in the environment for many years and has been found in _____________________________________________. keep bugs and other insects away persists soil, animals, and in humans all over the world A | Read the sentences. Then listen to a talk about DDT and answer the questions by completing the sentences. Listening 1 3. Why do more and more people choose organic fruits and vegetables? Because they fear that ___________________________________________________________ could be dangerous to their health. the constant consumption of food grown with pesticides B | Read the statements. Then listen again and check (?) T for true or F for false. Listening 1 1. DDT was sprayed directly on children to kill viruses. 2. Organic fruits and vegetables grow without pesticides. 3. It has been proved by scientific research that small am