Today we're going to discuss the history of the bicycle. In the early 19th century, the first two-wheeled vehicle, called a 'velocipede', was invented in Germany. It had no pedals; riders pushed their feet against the ground. Later, in the 1860s, French inventors added pedals to the front wheel, creating the 'boneshaker'. However, it was very uncomfortable due to its wooden wheels and metal frames. The real breakthrough came in 1885 when John Kemp Starley designed the 'safety bicycle' with a chain drive to the rear wheel and equal-sized wheels, making it much safer and more practical for everyday use.
❓ 根据讲座内容，1885年推出的安全自行车的主要优势是什么？
A. 它的座椅更舒适。
B. 它比早期型号更轻、更快。
C. 它采用了链传动和等径车轮，使其更加安全。
D. 这是第一辆带脚踏板的自行车。
✅ 正确答案
It used a chain drive and equal-sized wheels, making it safer