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 wasn't until the 1860s that pedals were added to the front wheel. However, this design was unstable and difficult to ride. In 1885, the 'safety bicycle' was introduced with a chain drive and two equal-sized wheels, making it much safer and more practical. This design quickly became popular, and by the 1890s, bicycles were mass-produced, allowing ordinary people to travel independently for the first time.
❓ 1885년의 '안전 자전거'는 이전 디자인들과 무엇이 달랐나요?
A. A. 페달이 없었고 발로 밀었다.
B. B. 앞바퀴에 페달이 연결되어 있었다.
C. C. 그것은 체인 구동 장치와 두 개의 동일한 크기의 바퀴를 가지고 있었다.
D. D. 그것은 대량 생산된 최초의 자전거였다.
✅ 正确答案
C. It had a chain drive and two equal-sized wheels.