Good morning, everyone. Today we're going to look at the history of the bicycle. Now, many people think the bicycle was invented in the 19th century, but in fact, a simple two-wheeled device appeared in France as early as 1790. However, it had no pedals and was pushed along by the feet. The first machine with pedals was built in Scotland in 1839, but it was very uncomfortable to ride. It wasn't until the 1880s that the 'safety bicycle' with a chain drive and equal-sized wheels became popular, making cycling accessible to a wider range of people, including women.
❓ 根据讲座内容,是什么让自行车在更广泛的人群中流行起来?
A. 苏格兰踏板的发明
B. 链传动和等尺寸车轮的引入
C. 法国出现的第一种两轮装置
D. 19世纪舒适座椅的发展
✅ 正确答案
The introduction of the chain drive and equal-sized wheels