In today's lecture, we'll discuss the history of the bicycle. The first two-wheeled vehicle, called the draisine, appeared in 1817 in Germany. It had no pedals; riders pushed their feet against the ground. In the 1860s, pedals were added to the front wheel in France, creating the velocipede. However, it was nicknamed the 'boneshaker' due to its rigid frame and rough ride. Later, in the 1880s, the safety bicycle was introduced in England with a chain drive and two equal-sized wheels, making it much more stable. This design became the basis for modern bicycles.
❓ 19世纪80年代推出的安全自行车的主要优势是什么？
A. 它的座椅更舒适。
B. 它更轻便，更容易携带。
C. 由于车轮尺寸相同且采用链条驱动，它更加稳定。
D. 它比早期型号行驶得更快。
✅ 正确答案
It was more stable because of its equal-sized wheels and chain drive.