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. It was called a 'hobby horse'. Later, in the 1860s, pedals were added to the front wheel, creating the 'velocipede'. However, this design was very uncomfortable due to its solid tires and rough ride. It wasn't until the 1880s that the 'safety bicycle' with two equal-sized wheels and a chain drive was introduced, making cycling much safer and more popular, especially among women.
❓ 1880년대에 도입된 안전 자전거의 주요 개선점은 무엇이었나요?
A. A. 앞바퀴에 페달이 연결되어 있었다.
B. B. 그것은 크기가 같은 두 개의 바퀴와 체인 구동 장치를 갖추고 있었다.
C. C. 그것은 라이더의 발에 의해 밀려서 움직였다.
D. D. 견고한 타이어를 장착하여 더 부드러운 주행이 가능했습니다.
✅ 正确答案
B. It had two equal-sized wheels and a chain drive.