Today we're going to discuss the history of the bicycle. Early bicycles, developed in the 19th century, had wooden frames and iron tires. The 'penny-farthing', popular in the 1870s, featured a large front wheel and a small rear wheel, which made it difficult to ride safely. In 1885, John Kemp Starley introduced the 'safety bicycle' with two equal-sized wheels and a chain drive, allowing riders to keep both feet on the ground when stopping. This design greatly improved stability and led to a cycling boom in the 1890s. By the early 20th century, bicycles became a common mode of transport, especially for workers commuting to factories.
❓ 1885년에 소개된 안전 자전거의 주요 장점은 무엇이었나요?
A. A. 속도를 내기 위해 앞바퀴가 더 컸다.
B. B. 라이더가 양발을 땅에 대고 정지할 수 있게 해 주었다.
C. C. 그것은 알루미늄과 같은 더 가벼운 재료로 만들어졌다.
D. D. 페달을 더 쉽게 밟을 수 있도록 모터가 장착되어 있었다.
✅ 正确答案
B. It allowed riders to stop with both feet on the ground.