Short message writing 500

In ancient times, people lived in a world with underdeveloped technology. Communication between people is very difficult. Flying pigeons pass books and drift bottles, and people ride fast horses in front of one post after another. These are all important means of communication in a certain period of society. On the surface, they seem to be fast, but in fact, they are not efficient. It takes several days for a flying pigeon to deliver a book, and the content delivered is extremely limited. Although the number of post horses was used, during the Sino-British War, an urgent letter was sent from Guangzhou to Daoguang Emperor. That was more than a month later. At that time, Guangzhou was occupied by the British army, and the information transmission was very slow. The war ahead was urgent and reinforcements were urgently needed, but the rear was unaware of it. It still lives in the dream of making the country prosperous and people safe, and the relatively fast "Kongming Lantern" can only transmit information in a short distance. At that time, it was close at hand. New communication tools, such as telegraph, telephone and television, have come out one after another, and the information transmission between people has also made a great leap, which has narrowed the distance between people. People are gradually covered by the invisible network woven by radio waves, and they are increasingly inseparable from it. People have entered the "radio wave era". 1948+0946, in the laboratory of the University of Pennsylvania, a giant weighing several tons was born-the world's first computer. Although its function and operation speed are far less than that of an ordinary computer now, its appearance is of epoch-making significance. Since then, mankind has entered the "computer age", and the appearance of computers has fundamentally changed people's way of life and changed the world. Now, the era we live in is vividly called the "network era", and the network has been closely related to each of us. Every day, we send e-mails through the Internet, chat with people we like, express our opinions on the Internet, and consult the required information, so as to understand the daily world dynamics, enjoy our favorite music, watch our favorite animations, movies and so on. In short, in the virtual world of the Internet, you will have a sky of your own, and you will feel a completely different lifestyle from reality. The Internet has brought a lot of convenience to our life. It adds a lot of excitement and improves people's efficiency. What used to take a few days to complete can now be completed in an instant with just a few keystrokes and a few mouse clicks. Today, when time is like life, all the meanings can't be expressed. Since then, "the end of the world" has become "the end of the world".