Today we're going to discuss the history of the bicycle. The first two-wheeled vehicle, called the draisine, was invented in 1817 by a German baron. It had no pedals; riders pushed themselves along with their feet. Later, in the 1860s, pedals were added to the front wheel, creating the velocipede. However, it was very uncomfortable due to its rigid frame and wooden wheels. In the 1880s, the safety bicycle appeared, featuring a chain drive and equal-sized wheels, which made riding much safer and more practical. This design eventually became the standard for modern bicycles.
❓ An toàn xe đạp đã có cải tiến lớn nào so với các mẫu xe trước đó?
A. A) Nó có bánh xe bằng gỗ.
B. B) Nó có bàn đạp gắn ở bánh trước.
C. C) Nó sử dụng bộ truyền động xích và các bánh xe có kích thước bằng nhau.
D. D) Nó được phát minh bởi một nam tước người Đức.