Today we're going to discuss the history of the bicycle. The first bicycle, invented in the early 19th century, had no pedals and was pushed along by the rider's feet. It wasn't until the 1860s that pedals were added to the front wheel. However, this design was unstable and difficult to ride. In 1885, the 'safety bicycle' was introduced with a chain drive and two equal-sized wheels, making it much safer and more efficient. This design quickly became popular, and by the 1890s, cycling had become a widespread leisure activity, especially among women who gained new freedom of movement.
❓ 1885年推出的安全自行车在安全性能上的主要改进是什么?
A. A. 它没有踏板,靠脚蹬地推动前行。
B. B. 它采用链条传动,并配有两个大小相同的轮子。
C. C. 它有一个非常大的前轮,以便提高速度。
D. D. 它更轻便,而且易于折叠。
✅ 正确答案
B. It had a chain drive and two equal-sized wheels.