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 efficient. This design quickly became popular, and by the 1890s, cycling had become a widespread leisure activity, especially among women who gained new freedom of movement.
❓ 1885년에 도입된 안전자전거의 주요 개선점은 무엇이었나요?
A. A. 페달이 없었고 발로 밀었다.
B. B. 그것은 체인 드라이브와 두 개의 같은 크기의 바퀴를 가지고 있었다.
C. C. 속도를 내기 위해 매우 큰 앞바퀴를 가지고 있었다.
D. D. 더 가볍고 쉽게 접을 수 있었다.
✅ 正确答案
B. It had a chain drive and two equal-sized wheels.