Unit 7 Section A 1a-1c 课件2022-2023学年人教版英语七年级下册

Unit7 What's the highest mountain in the world? SectionA 1a-1c What’s it? What’s the highest mountain in the world? Qomolangma. /ˈtʃəʊməʊˌlɑːŋmə/ It’s a mountain. Let’s guess. What’s it? What’s the longest river in the world? The Nile. /naɪ/ It’s a river. Let’s guess. It’s a lake. Salt lake. What’s the deepest lake in the world? The Caspian Sea. /ˈkæspɪən/ What’s it? Let’s guess. Let’s guess. What’s it? What’s the biggest desert in the world? The Sahara. /səˈhɑːrə/ It’s a desert /ˈdezət/. The expression of numbers 4 21 128 5,820 Read these numbers four twenty-one one hundred and twenty- eight five thousand eight hundred and twenty How about these? 886,510 2,019 7,725,385 84.14 111 ,111 ,111 要读一组长数字，可以先把这组数字分3个数字一组用逗号隔开 111111111 million （百万） thousand （千） 英语里没有万，十万的表达 一万：ten thousand 十万： one hundred thousand 7 Have a try 86，510 eighty-six thousand five hundred and ten 2，019 two thousand and nineteen 百位数没有，不读 7，725，385 seven million seven hundred and twenty-five thousand three hundred and eighty-five Have a try 9，600，000 nine million six hundred thousand 84 . 14 eighty-four point one four 小数点用point表示 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 Have a test 45567 forty-five thousand five hundred and sixty-seven 7899256 67 . 23 sixty-seven point two three 45 , 567 7 , 899 , 256 seven million eight hundred and ninety-nine thousand two hundred and fifty-six 珠穆朗玛峰是世界海拔最高的山峰，高度为8844.43米。 Qomolangma eight thousand eight hundred and forty-four point four three Which is the highest mountain in the world? the Nile 尼罗河长6671千米，是世界上最长的河流。 six thousand six hundred and seventy-one Which is the longest river in the world? the Caspian Sea 里海虽称海，却是一个巨大的内陆咸水湖，深1025米，是世界上最大的湖泊 one thousand and twenty-five Which is the biggest lake in the world? the Sahara 形成于约250万年前，世界上最大的沙质荒漠，约9,600,000平方千米 nine million six hundred thou