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 'hobby horse', was invented in 1817 by a German baron. It had no pedals, and riders pushed themselves along with their feet. Later, in the 1860s, pedals were added to the front wheel, creating the 'boneshaker'. However, it was not until the 1880s that the 'safety bicycle' with a chain drive and two equal-sized wheels became popular, making cycling much safer and more accessible to the general public.
❓ 是什么让“安全自行车”比早期型号更受欢迎?
A. A. 它的前轮上装有踏板。
B. B. 它有两个大小不同的轮子。
C. C. 它采用了链传动和等大的车轮。
D. D. 它更轻便,生产成本也更低。
✅ 正确答案
C. It featured a chain drive and equal-sized wheels.