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. It was called a 'hobby horse'. Later, in the 1860s, pedals were added to the front wheel, but this design was unstable and difficult to ride. It wasn't until the 1880s that the 'safety bicycle' with a chain drive and two equal-sized wheels became popular, making cycling much safer and more accessible to the general public.
❓ 안전 자전거가 초기 디자인보다 더 인기를 끌게 된 이유는 무엇인가요?
A. A. 그것은 더 큰 앞바퀴를 가지고 있었다.
B. B. 더 가볍고 생산 비용이 더 저렴했다.
C. C. 안전을 위해 체인 구동 방식과 동일한 크기의 바퀴를 사용했다.
D. D. 앞바퀴에 페달이 연결되어 있었다.
✅ 正确答案
C. It used a chain drive and equal-sized wheels for safety.