Today's lecture is about the history of the bicycle. Now, many people assume the bicycle was invented in the 19th century, but in fact, a two-wheeled device called a 'celerifere' appeared in France in the 1790s. However, it had no steering and no pedals. The first pedal-powered bicycle, known as the 'velocipede', was developed in the 1860s in Paris. It had a wooden frame and iron tires, which made rides very bumpy. Later, in the 1880s, John Kemp Starley introduced the 'safety bicycle' with a chain drive and two equal-sized wheels, which greatly improved stability and comfort. This design became the basis for modern bicycles.
❓ Lợi thế chính của 'xe đạp an toàn' ra đời vào những năm 1880 là gì?
A. Nó có khung nhẹ hơn làm bằng nhôm.
B. Nó bao gồm lốp cao su bơm hơi.
C. Nó có bộ truyền động xích và các bánh xe có kích thước bằng nhau để ổn định hơn.
D. Đây là mẫu xe đầu tiên có bàn đạp gắn vào bánh trước.
✅ 正确答案
It featured a chain drive and equal-sized wheels for better stability.