turn waste into treasure 变废为宝 In our life, there is a large amount of domestic garbage. 在我们的生活中，存在着大量的生活垃圾。 How to turn waste into treasure? So let's study that. 如何变废为宝呢？我们来研究一下吧。 Think about it 想一想: The content of the study must be determined first. 先要确定研究的内容。 1. Which garbage can be reused? What can't be reused? 1. 哪些垃圾可以再利用？哪些不可再利用？ 2. How many kilos of garbage can your home produce a day? Full set? 1. 你家一天可以产生各种垃圾多少千克？全组呢？ Determine the method of the study. 再确定研究的方法。 1. Look up relevant information online. 1. 上网查阅相关资料。 2. Go to the sanitation department to learn about garbage recycling. 1. 到环卫处了解垃圾的回收情况。 3. Design questionnaires and statistical tables. 1. 设计调查表和统计表。 Let’s do it 做一做： Sort the garbage first and see what can be reused. 1. 先给垃圾分分类，看看有哪些可以再利用。 Through checking the information, I know that waste plastic can be recycled and reprocessed into plastic products. 通过查资料，我知道废塑料可以回收利用，重新加工成塑料制品。 Through to the waste goods acquisition station uncle consultation, I know that waste paper can be recycled into recycled paper...... 通过向废品收购站的叔叔咨询，我知道废纸可以回收加工成再生纸...... 2. How many kilos of recyclable waste can our group produce per week? 1. 我们小组每家一周能产生多少千克可回收垃圾呢？ The amount of recyclable waste my family produces in a week is...... 我家一周产生的可回收垃圾的数量分别是...... Our group has 4 students, 4 families of a week...... 我们小组有4名同学，4家一周...... Let's talk about it 说一说： The amount of recyclable waste our class can produce in a week is...... 我们全班同学家一周能产生可回收垃圾的数量是...... Garbage has many uses. 垃圾的用途很多。 One ton of waste paper can produce 800 kilograms of recycled paper. 用1吨废纸能生产800千克再生纸。 With one ton of waste plastic can be more than 500 kilograms of oil refining. 用1吨废塑料能炼油500多千克。 Let's discuss it 议一议： Use less disposable items, can reduce the production of garbage. 少用一次性用品，可以减少垃圾的产生。 When throwing rubbish, separate recyclable from non-recyclable...... 扔垃圾时，应把可回收的与不可回收的进行分类...... My performance in this activity...... 在本次活动中我的表现...... Unit 8 Beautify the Campus——The circumference of the figure 美化校园——图形的周长 Lesson 1 Let's put guardrails on each flower bed. 我们给每个花坛安上护栏吧。 What questions can you ask? 你能提出什么问题？ Cooperative exploration 合作探索 1. How long does each flower bed need? 1. 每个花坛各需要多长的护栏呢？ Just know the circumference of each flower bed. 只要知道每个花坛的周长就可以了。 What is the circumference? 什么是周长呢？ The length of a circle is their circumference. 一周的长度就是它们的周长。 Can you find a way to measure their circumference? 你能想办法测量它们的周长吗？ Can you figure out how to measure the circumference of the red scarf and the flag of the Young Pioneers? 你能想办法测量出红领巾和少先队队旗的周长吗？ Lesson 2 Rectangular flower beds are 9 meters long and 4 meters wide. 长方形花坛的长是9米，宽是4米。 Guardrail 8 yuan per meter 护栏8元/米 What questions can you ask? 你能提出什么问题？ Cooperative exploration 合作探索 1. How much does it cost to put a guardrail around a rectangular flower bed? 1. 给长方形花坛围上护栏，需要多少钱呢？ The circumference of the rectangle is equal to length plus width then times two 长方形的周长＝(长﹢宽)×2 How much does it cost to put a guardrail around the square flower bed? 1. 给正方形的花坛围上护栏，需要多少钱呢？ The circumference of a square is equal to the length of the sides times 4 正方形的周长＝边长×4 |
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