Today, we're discussing the history of the bicycle. While many people think of the penny-farthing as an early design, it was actually the 'safety bicycle' in the 1880s that made cycling popular. The key innovation was the chain drive, which allowed the pedals to turn the rear wheel, enabling smaller front wheels and a lower seat. This made the bicycle much safer, especially for women, who could now ride in long skirts. Interestingly, the pneumatic tire, invented by John Boyd Dunlop in 1888, was originally developed to make his son's tricycle more comfortable, not for racing. However, it quickly improved speed and comfort on rough roads.
❓ 안전 자전거가 이전 디자인보다 가진 주요 장점은 무엇이었나요?
A. 더 큰 앞바퀴를 가져 더 빠른 속도를 낼 수 있었다.
B. 체인 구동 방식을 사용하여 더 작은 앞바퀴와 낮은 시트를 가능하게 했습니다.
C. 최초로 페달이 장착된 자전거였다.
D. 여성 라이더를 위해 특별히 발명되었습니다.
✅ 正确答案
It used a chain drive allowing a smaller front wheel and lower seat.