Today we're going to discuss the history of the bicycle. Although many people think of the bicycle as a relatively modern invention, its origins date back to the early 19th century. The first two-wheeled vehicle, called a 'velocipede', was invented in Germany in 1817. It had no pedals; riders pushed their feet against the ground to move. Later, in the 1860s, pedals were added to the front wheel in France. However, it wasn't until the 1880s that the chain drive and pneumatic tires were introduced, making bicycles safer and more comfortable. By the early 20th century, bicycles had become a popular mode of transport for ordinary people.
❓ Đặc điểm chính của xe đạp chạy bằng chân (velocipede) được phát minh năm 1817 là gì?
A. A. Nó có bàn đạp gắn vào bánh trước.
B. B. Nó được vận hành bằng cách đẩy chân trên mặt đất.