In today's lecture, we'll discuss the history of the bicycle. The first practical bicycle, called the 'draisine', was invented in Germany in 1817 by Karl von Drais. It had no pedals; riders pushed their feet against the ground. In the 1860s, pedals were added to the front wheel, creating the 'velocipede'. However, it was nicknamed the 'boneshaker' due to its uncomfortable ride on cobblestone streets. Later, in the 1880s, the 'safety bicycle' was introduced with two equal-sized wheels and a chain drive, making it much safer and more popular. This design is the basis for modern bicycles.
❓ '안전 자전거'가 이전 모델보다 더 인기를 끌게 된 주요 이유는 무엇인가요?
A. A. 그것은 이전의 자전거들보다 더 가볍고 빨랐다.
B. B. 더 편안한 좌석과 더 부드러운 타이어를 갖추고 있었다.
C. C. 바퀴 크기가 동일하고 체인 구동 방식이었기 때문에 더 안전했습니다.
D. D. 그것은 벨로시페드보다 제조 비용이 더 저렴했다.
✅ 正确答案
C. It was safer because of its equal-sized wheels and chain drive.