Good morning, everyone. Today we're going to talk about 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 the rigid frame and wooden wheels. 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 practical for the general public.
❓ 안전 자전거가 이전 디자인에 비해 크게 개선된 점은 무엇이었나요?
A. A. 그것은 더 큰 앞바퀴를 가지고 있었다.
B. B. 그것은 모터로 작동되었다.
C. C. 그것은 크기가 같은 두 개의 바퀴와 체인 드라이브를 갖추고 있었다.
D. D. 그것은 전적으로 나무로 만들어졌다.
✅ 正确答案
C. It had two equal-sized wheels and a chain drive.