Today we're going to discuss the history of the bicycle. While many people think of it as a modern invention, the first two-wheeled vehicle appeared in the early 19th century. However, it wasn't until the 1880s that the 'safety bicycle' with equal-sized wheels and a chain drive became popular. This design made riding much safer and more efficient, leading to a boom in cycling. Interestingly, the pneumatic tire, invented by John Boyd Dunlop in 1888, was originally developed to make his son's tricycle more comfortable, but it was soon adopted for bicycles, greatly improving ride quality.
❓ 1880년대 안전 자전거의 인기가 높아진 주요 이유는 무엇이었는가?
A. A. 이전 모델들보다 생산 비용이 더 저렴했다.
B. B. 그것은 동일한 크기의 바퀴와 체인 구동 장치를 갖추고 있어 더 안전하고 효율적이었다.
C. C. 공기 타이어를 사용한 최초의 자전거였다.
D. D. 그것은 경주 대회를 위해 특별히 설계되었습니다.
✅ 正确答案
B. It had equal-sized wheels and a chain drive, making it safer and more efficient.