Today we're going to discuss the history of the bicycle. The first bicycle, invented in the early 19th century, was called a 'velocipede'. It had no pedals; riders pushed their feet against the ground to move. Later, in the 1860s, the 'penny-farthing' appeared, with a large front wheel and a small rear wheel. It was fast but dangerous. By the 1880s, the 'safety bicycle' was introduced, featuring two wheels of equal size and a chain drive. This design made cycling much safer and more accessible, leading to a boom in popularity among both men and women.
❓ 安全自行车相比早期型号的一个主要优势是什么？
A. A. 它更轻便，更容易携带。
B. B. 它采用了链条传动和等大的车轮，因此更加安全。
C. C. 它可以不用手就能骑乘。
D. D. 它是第一款配备踏板的车型。
✅ 正确答案
B. It had a chain drive and equal-sized wheels, making it safer.