Good morning, everyone. Today we're going to discuss the history of the bicycle. The first bicycle, invented in 1817 by a German baron, was made of wood and had no pedals; riders pushed their feet against the ground to move forward. In the 1860s, French inventors added pedals to the front wheel, creating the 'velocipede'. However, it was uncomfortable due to its rigid frame. By the 1880s, the 'safety bicycle' appeared with a chain drive and two equal-sized wheels, making it much safer and more popular. Interestingly, the popularity of bicycles in the late 19th century also influenced women's fashion, leading to more practical clothing.
❓ 19世纪80年代推出的安全自行车的一个关键特征是什么？
A. A. 它有一个木制框架，没有踏板。
B. B. 它的前轮上装有踏板。
C. C. 它采用链条传动，并拥有两个大小相同的轮子。
D. D. 它主要是为女性时尚而设计的。
✅ 正确答案
C. It used a chain drive and had two equal-sized wheels.