Good morning, everyone. Today we're going to discuss the history of the bicycle. The first pedal-powered bicycle was invented in the 1860s, but it had a major flaw: the pedals were attached directly to the front wheel, making it difficult to steer. In the 1870s, the 'penny-farthing' became popular, but its large front wheel made it unstable. It wasn't until the 1880s that the 'safety bicycle' with a chain drive and equal-sized wheels was introduced, which is similar to modern bicycles. This design greatly improved stability and safety, leading to a cycling boom in the 1890s.
❓ 강의에 따르면, 최초의 페달 구동 자전거의 주요 문제점은 무엇이었나요?
A. A. 그것은 브레이크가 없었다.
B. B. 페달이 앞바퀴에 부착되어 있어 조향에 어려움이 있었다.
C. C. 너무 무거웠다.
D. D. 체인 구동 장치가 있어서 자주 고장이 났다.
✅ 正确答案
B. The pedals were attached to the front wheel, causing steering difficulties.