Unit three(第三单元) Small production -- the preliminary understanding of horn (小制作——角的初步认识) Lesson one 1. The flag has three corners. What is an Angle? 小旗上有三个角。什么是角呢？ 2. The horns are pointed. An Angle has two straight sides. 角是尖尖的。 角有两条直直的边。 3. Look at the picture. What are these? 观图，这些都是什么？ 4. An Angle has one vertex and two sides. 角有一个顶点、两条边。 5. What other objects can you find angles on? 你还能在哪些物体上找到角？ 6. Do you recognize the angles on these objects? 你认识下面这些物体上的角吗？ 7. What kind of Angle is a right Angle? 什么样的角是直角呢？ 8. Let's practice! 我们来练习一下吧！ Lesson two 1. Can you figure out a way to make an Angle? 你能想办法做出一个角吗？ 2. Look at pictures and understand information. 观图，理解信息。 3. I nailed together with two stiff straight strips and arranged them at three different angles. 我用两根硬直条钉在一起，摆了3个不同的角。 4. It's less than a right Angle. It's an acute Angle. It's bigger than a right Angle. It's acute. 比直角小，是锐角。 比直角大，是锐角。 5. Let's practice! 我们来练习一下吧！ Lesson three The shape of the window is rectangular. 窗户的形状是长方形的。 2. Can you count the number of rectangles on the window? 你能数出窗户上有多少个长方形吗？ 3. How did you count them? 你是怎么数的？ 4. How to count without repetition and omission? 怎么数能做到不重复、不遗漏？ 5. Sequential number, can do not repeat, not omission. 有顺序地数，能做到不重复、不遗漏。 6. Let's practice! 我们来练习一下吧！ |
Powered by Discuz! X3.4
Copyright © 2001-2020, Tencent Cloud.
