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陈雷英语 科学 四年级下册 查看内容

第21课

2021-6-12 11:14| 发布者: admin| 查看: 142| 评论: 0

摘要: .
 
Unit 7第七单元
Design and manufacture of lamp设计制作小台灯
1.Traffic lights make traffic smooth and safe, street lights illuminate the way home...红绿灯让交通顺畅安全,路灯照亮回家的路…
2.The little lamp brings convenience to our life. Let's make the light.小小的台灯给我们的生活带来了便利。我们来制作小台灯吧。
21.Design of small lamps设计小台灯
Problems and requirements问题与需求
1.Put forward demand: learning, a sudden power failure, what to lighting? 提出需求:学习时,突然停电了,用什么来照明呢?
2.Make a small lamp that you can use during power outages做个停电时也可以使用的小台灯吧
3.Can...可以…
4You can use a flashlight.可以用手电筒
5Clear question: what kind of small table lamp can meet our needs?.明确问题:做个什么样的小台灯能满足我们的需求?
Lamcover灯罩
Mind - based navigation思维导航
灯泡
1. What is the function of each part of the lamp? How does the lamp realize the lighting function?台灯各部分的作用是什么?台灯是怎样实现照明功能的?
2. How to make the lamp easy to carry, and can emergency lighting in power failure? 怎样使台灯既便于携带,又可以在停电时应急照明?
1.Light bulb灯泡
2.Support bracket支架
3.Base底座
4.Switch: 电源线
Design and Production设计与制作
1.●Determine the scheme: what kind of small lamp is designed?确定方案:设计一个什么样的小台灯?
2.What kind do you do? 做个什么样的呢?
3.I know LED bulb...我知道LED灯泡…
4.The small desk lamp can be powered with a dry battery. 可以用干电池给小台灯供电。
5.Draw the design diagram画出设计图
Mind - based navigation思维导航

1. What is the circuit of the small lamp? 小台灯的电路是什么样的?
2. What is the appearance of the small lamp?小台灯的外观是什么样的?
3.Where are the components?各元件分别放在什么位置?
1.This is our design diagram. 这是我们的设计图。
2.Perfect our design from the discussion. 根据讨论的意见,完善我们的设计吧。
3.Replace the base with...把底座换成…
4.Design the lampshade to be a like …把灯罩设计成…
●Preparation materials:准备材料:
5What kind of material is more suitable?制作材料表
Materials材料
Role作用
Price价格
Conductors导线
Switch: 开关
Power supply电源
Mind - based navigation思维导航

1. which material is more suitable for each part of the small lamp?.小台灯的各部分选用哪种材料更合适?
2.How do reduce production costs?怎样降低制作成本?


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