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 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 became popular, making cycling much safer and more accessible for the general public.
❓ 강의에 따르면, 안전자전거의 주요 특징은 무엇이었나요?
A. A. 페달이 없었고 발로 밀었다.
B. B. 그것은 큰 앞바퀴와 작은 뒷바퀴를 가지고 있었다.
C. C. 그것은 크기가 같은 두 개의 바퀴와 체인 드라이브를 갖추고 있었다.
D. D. 그것은 전적으로 나무로 만들어졌으며 매우 가벼웠다.
✅ 正确答案
C. It had two equal-sized wheels and a chain drive