Today we're going to discuss the history of the bicycle. Although many people think the bicycle was invented in the 19th century, early prototypes appeared in the 18th century. The first two-wheeled vehicle, called a 'velocipede', was created in 1817 by a German inventor. However, it had no pedals; riders pushed their feet against the ground. In the 1860s, French inventors added pedals to the front wheel, which made riding faster but also more dangerous. It wasn't until the 1880s that the 'safety bicycle' with a chain drive and equal-sized wheels became popular, making cycling accessible to everyone.
❓ 1880년대에 자전거를 더 안전하고 더 대중적으로 만든 것은 무엇이었나요?
A. A. 앞바퀴에 페달을 추가하는 것
B. B. 체인 드라이브와 동일한 크기의 바퀴의 발명
C. C. 최초의 이륜 차량의 창조
D. D. 접지력 향상을 위한 고무 타이어 사용
✅ 正确答案
B. The invention of the chain drive and equal-sized wheels