https://padlet.com/106500321/Wifi 伴随着眼波和微笑 en-us 2018-05-01 02:33:26 UTC 2018-05-05 13:55:04 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Lightdecrease.png 106500321 https://padlet.com/106500321/Wifi/wish/257072771 發明者]]> 2018-05-02 00:32:36 UTC https://padlet.com/106500321/Wifi/wish/257072771 106500302 https://padlet.com/106500321/Wifi/wish/257073846 The history of Hedy Lamarr]]> 2018-05-02 00:37:55 UTC https://padlet.com/106500321/Wifi/wish/257073846 106500321 https://padlet.com/106500321/Wifi/wish/257074892 Today we are going to talk about who invented wifi,I think it is interesting,because who invented wifi is the very popular Hollywood actor-Hedy Lammar.Originally back in the 1940s.Hedy Lamarr made Changing the piano keys can change the sound, so changing the radio signal frequency can also change the signal.If you change the signal frequency at random, the enemy's interference will be much less.this is the key to the wifi invetion.]]> 2018-05-02 00:44:15 UTC https://padlet.com/106500321/Wifi/wish/257074892 10650013 https://padlet.com/106500321/Wifi/wish/257075717 After searching the informatios about wifi,we learn about   Wifi let our life more convience and ]]> 2018-05-02 00:49:38 UTC https://padlet.com/106500321/Wifi/wish/257075717