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 device, called a 'hobby horse', appeared 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, creating the 'velocipede'. However, these early bicycles were very uncomfortable due to their solid rubber tires. It wasn't 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”在19世纪80年代流行起来?
A. 它的前轮上装有踏板。
B. 它采用了链条传动和等大的车轮,从而更加安全。
C. 这是第一辆配备实心橡胶轮胎的自行车。
D. 它可以通过骑行者用脚蹬地来推动前进。
✅ 正确答案
It featured a chain drive and equal-sized wheels, making it safer.