True: Printing press was invented in 1455., Jospeh Swan and Thomas Edison invented the light bulb., TV was invented in 1926., The first vacuum cleaners were big and heavy., Before telephones people had to write letters., Before lights were invented people used candles., In 1822, Charles Babbage began developing the first automatic computing engine., False: Printing press was invented in 1950., Johann Gutenberg invented the light bulb., TV was invented in 1455., The first vacuum cleaners were light and small., Today cars are very slow., Today televisions have white and black pictures., In 1922, Charles Babbage began developing the first automatic computing engine.,

Inventions

由
打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？