When you're enjoying “ Migrant workers ”：
In life 80% The pain comes from working , But I know , If you don't work , There will be 100% The pain comes from the lack of money , So between working and not having money , I choose to work .----《 Declaration of employment 》
When it comes to headlines , Find out how fast information spreads , The hot spots are wave after wave , Make people live fast and compact , Sometimes I smile in my heart , Sometimes think in silence .
In today's wave of information technology , Think about the development of the whole network , Maybe I know where I am now . Someone once said ： Don't know your past , There's no way to understand where you are now , And where to go in the future .
In ancient China , You can see many beacon towers on the Great Wall , And what are these beacon towers for ？ Is it for barbecue ？ Obviously not , It's used for communication . When the enemy comes , The guards will light fireworks , At this time, the smoke rises , After seeing the beacon tower in the distance , And immediately set fire to , It's like this, one by one , Then the military information can be transmitted to the palace in the distance . so , The ancient means of communication were by sight and fireworks , This way is suitable for daytime , Or better weather , And the distance is limited .
With the development of society , Come to the age of electrification , At this time, radio wave is the best choice , Because it can communicate over a long distance , And it's less affected by the weather . Like telegrams , It can take up a long time of communication . And then we'll move on , It's the age of the telephone , At this time, voice two-way communication can be carried out . When semiconductor technology develops further