Good morning, everyone. Today we're going to look at the history of the bicycle. Now, you might think that the bicycle was invented in the 19th century, and you'd be right. However, the first two-wheeled vehicle, called a 'draisine', appeared in 1817, invented by Karl von Drais. It had no pedals; you pushed it with your feet. Then, in the 1860s, pedals were added to the front wheel in France, creating the 'velocipede'. But it was still very uncomfortable. The big change came in 1885 when John Kemp Starley designed the 'safety bicycle' with a chain drive to the rear wheel and two equal-sized wheels, which made cycling much safer and more practical. This design is basically what we still use today.
❓ 1885年推出的“安全自行车”的主要优势是什么?
A. 前轮上装有踏板,以便提高速度。
B. 它更轻便,更容易携带。
C. 它采用了链式传动和等径车轮,从而更加安全。
D. 这是第一辆拥有两个轮子的自行车。
✅ 正确答案
It had a chain drive and equal wheels, making it safer.