Unit 5 Revealing Nature Using language Listening&Biodiversity&Vocabulary课件-2023-2024学年高二英语外研版选择性必修第一册

Unit 5 Using language 高中新外延选择性必修一 Listening (Biodiversity) Vocabulary & speaking Pre-listening be harmful to sb food production organic matter immune systems be able to do sth fight off be made up of consist of by the way 对……有害 食品生产 有机物 免疫系统 能够做某事 抵抗,击退 由……组成 由……组成 顺便一提,附带说一句 Pre-listening the vast majority of in fact Oh, this is making my stomach turn. speaking of help with digestion at the other end of have an important role deal with break down 绝大部分,绝大多数 事实上 熟词生义 turn v. 作呕,恶心,使(胃不适) 谈到,谈及 帮助消化 在……的另一端 有重要作用 处理 分解 While-listening Listen to the podcast and choose the statements that are made. 1 Biodiversity is important. 2 Bacteria are always harmful to humans. 3 Some species of bacteria are used in food production. 4 Many species of bacteria recycle dead organic matter. 5 Our immune systems are able to fight off all germs. √ √ Listen again and complete the fact sheet. While-listening Cells • Every living thing is 1 _. They are like 2 _. • In the human body there are about 3 _ human cells and around 4 _ bacteria cells. Bacteria • Most bacteria in the human body can 5 _. • In the food production process, bacteria can 6 _ dead organic matter. made up of cells bricks that are used to build houses thirty trillion thirty-nine trillion help with digestion break down What do you know about cells and bacteria? Post-listening Pair work 内皮细胞 胰腺细胞 Post-listening Complete the boxes with the expressions from the podcast. ① Do you know about…? ② Have you heard of…? ③ By the way, ... ④ In fact, ... ⑤ Actually, ... ⑥ Speaking of which, ... Checking background knowledge Adding information 1 2 4 5 6 3 Read the passage and answer the questions. Earth is home to millions of different species. Some can be very small, like bacteria and viruses, which are so small that we cannot see them with only our eyes. By contrast, the largest animal species so far found on our planet is the blue whale, which can grow up to almost 30 metres in length and weigh over 130,000 kilos. The toughest spec