In today's lecture, we'll discuss the history of the bicycle. The first verifiable bicycle, called the draisine, was invented by Karl von Drais in 1817. It had no pedals; riders pushed their feet against the ground. 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 iron wheels. The major breakthrough came in 1885 when John Kemp Starley introduced the 'Rover' safety bicycle, which featured a chain drive to the rear wheel and equal-sized wheels. This design greatly improved stability and safety, making cycling accessible to the general public.
❓ 1885년에 출시된 로버 안전 자전거의 주요 장점은 무엇이었나요?
A. 페달이 달린 최초의 자전거였다.
B. 좌석이 더 편안했습니다.
C. 체인 구동 방식과 동일한 크기의 바퀴 덕분에 더 안전하고 안정적이었습니다.
D. 이전 모델들보다 더 가볍고 저렴했습니다.
✅ 正确答案
It was safer and more stable due to its chain drive and equal-sized wheels.