Unit 7 Section A 1a-1c 课件 2022-2023学年人教版英语八年级下册

Unit 7 What’s the highest mountain in the world? Section A 1a-1c n.正方形；广场 adj.平方；正方形的井 square meter(=metre) n.米；公尺 deep adj.深的；纵深的 new words desert n.沙漠 population n.人口；人口数量 tourist n.墙 wall n.旅行者；观光者 What’s the highest mountain in the world? How high is it? Qomolangma Qomolangma is the highest mountain in the world. It is 8,844.43 meters high. lead in eight thousand eight hundred and forty-four point four three What do you know about the following numbers? 1,025 meters deep The Caspian Sea one thousand and twenty-five What do you know about the following numbers? 6,671 kilometers long The Nile six thousand six hundred and seventy-one What do you know about the following numbers? 9,600,000 square kilometers in size The Sahara nine million six hundred thousand Can you read these large numbers? hundred 百 thousand 千 million 百万 billion 十亿 trillion 万亿 9,600,000 1,025 6,671 8,844.43 nine million six hundred thousand one thousand and twenty-five six thousand six hundred and seventy-one eight thousand eight hundred and forty-four point four three summary 把长数字分为3个数字一组，用逗号隔开，从右到左， 把第一个逗号看作thousand，第二个逗号看作million,第三个逗号是billion 1 2 ”and“ 只有十位数和百位数之间出现 3 小数点后面的数字按单个读 百位数没有数字时，thousand 和 十位数之间，and不省略 84 . 14 小数点后面读one four 不整读 10 What are these descriptions for? 9,600,000 1,025 6,671 8,844.43 square kilometers in size meters deep kilometers long meters high 平方千米 meter n. 米; 公尺 adj. 深的；纵深的 （面积、体积等）大小 land sea river mountain Qomolangma about 9,000,000 square kilometers in size The Sahara 1,025 meters deep The Caspian Sea 6,671 kilometers long The Nile 8,848.86 meters high 1a Match the facts you know. 1b Listen and complete the sentences. 1. Qomolangma is ______ than any other mountain in the world. 2. The Sahara is ____________ desert in the world. 3. The Caspian Sea is ____________ of all the salt lakes. 4. The Nile is ____________ river in the world. higher the biggest the deepest the longest Teacher: Yesterday, we learned some important