Good morning, everyone. Today we're going to discuss the history of the bicycle. The first bicycle, invented in the early 19th century, had no pedals and was pushed along by the rider's feet. Later, in the 1860s, pedals were added to the front wheel, but this design was unstable. It wasn't until the 1880s that the 'safety bicycle' with two equal-sized wheels and a chain drive became popular. This design made cycling much safer and more efficient, leading to a boom in bicycle use, especially among women, who gained greater freedom of movement.
❓ 강의에서 언급된 안전 자전거의 주요 장점은 무엇이었나요?
A. 이전 모델들보다 생산 비용이 더 저렴했다.
B. 라이더들이 이전보다 더 빠르게 이동할 수 있게 해 주었다.
C. 체인 구동과 동일한 바퀴 덕분에 더 안전하고 효율적이었습니다.
D. 험한 도로에서도 어려움 없이 사용할 수 있었다.
✅ 正确答案
It was safer and more efficient due to its chain drive and equal wheels.