老师：同学们大家好，欢迎来到北京市中小学空中课堂。我是来自于北京市朝阳外国语学校的韩方老师。今天我们将继续学习外研版初中英语八年级上册 module nine unit three。
老师：Do you remember what we Learned in Unit 1 and Unit 2? We met some large numbers. Let's read out the large numbers. 1000,2 million, 3 billion. When it is here, it should be 100. When it's here, it should be thousand.
老师：When it is here, which has 6 OS, it should be million. When is here, it has 9 OS, that should be billion. Let's look at a large number and try to read out this. Do you have any ideas, students? Yes? It should be 3 billion, 152 million, 641000. Let's practice more. The first one should be 4 million, 437000. The second number should be 22 million, 956000. The third number should be 314 million, 791000. Number d should be 1 billion, 370 million, 537000. Let's listen and match the countries with their populations. Are you ready?
学生：1 China has a population of 1370.537 million. 2. The population of the US is 314.791 million. 322.956 million people live in Australia. 44.437 million people live in New Zealand.
老师：Let's check answers. China has the population of 1.37 billion, 537000. Well, the US has the population of 314 million, 791000. 22.956 Million people live in Australia. New Zealand has 4.437 million people.
老师：Okay, next I'll show you a chart. How to read the chart. Look at the bottom of the chart. They are the names of the cities. Here are the number of people. And pay attention, these numbers are in millions. For example, 40 doesn't only mean 40, it means 40 million. And here we have the blue thing and the orange thing. They mean the year 2000 and the year 2025.
老师：Let's look at some questions and understand the chart more. Number one, which city had the largest population in 2000? We need to find the blue column because they are in the year 2000, and the highest column should be here. And the name of the city is Tokyo. So we can say Tokyo had the largest population in 2000.
老师：Question 2, which city's population will increase the most from 2000 to 2025? Here we need to find the difference between the blue column and the orange column, the largest difference goes here, and the city is Mumbai. So we say Mumbai's population will increase the most from 2000 to 2025.
老师：Question three, which city will have a larger increase in this population, New York or Mexico City? Here we need to compare. This is the population increase in New York and this is population increase in Mexico City. From the numbers we know, Mexico City will have a larger increase in this population.
老师：Question 4, which city or cities do you think will have the biggest population problem? Why? First, we need to understand what the biggest population problem is. For me, I think the biggest population increase means the biggest population problem. Here we h
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