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 uncomfortable due to its 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 efficient. This design is essentially the same as modern bicycles.
❓ 1880년대에 소개된 '안전 자전거'의 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 구동 장치를 갖추고 있었다.
D. D. 그것은 나무 프레임과 단단한 바퀴를 가지고 있었다.
✅ 正确答案
C. It had two equal-sized wheels and a chain drive.