老师
Welcome back everybody. Let's learn lesson 2 interesting contact ways. In this lesson we will learn some contact ways in the history through articles and express our ideas about this contact ways. Are you clear? Okay, let's begin. In the last lesson we Learned 8 different contact ways. Let's see more. Okay.
学生
A brief and somewhat accurate history of how we stay connected. Let's see if an important message can be delivered by different means of communication. Such as the smoke signal, the homing pigeon, the Pony Express, the semaphore flag, the Telegraph, the telephone, the radio, email, the smartphone.
老师
Okay, what contact waste did you see in the video? Yes, smoke signal.
学生
The smoke signal.
老师
Is an easy way to use in the past. And next we have pigeon and Pony Express. They are very helpful. Right. And what comes next? Do you remember? It's Santa 4. Follow me, stephore. semafor 打旗语 people use。
老师
Two flags to send messages. It's very interesting. Let's look again.
学生
The