In today's lecture, we'll discuss the history of the bicycle. The first bicycle, invented in the early 19th century, had no pedals; riders pushed their feet against the ground. This was called a 'hobby horse.' Later, in the 1860s, pedals were added to the front wheel, creating the 'penny-farthing.' However, these were dangerous due to their large front wheel. It wasn't until the 1880s that the 'safety bicycle' appeared, with two equal-sized wheels and a chain drive, making it much safer and more practical for everyday use.
❓ 강의에 따르면, 안전 자전거가 이전 모델들보다 가진 주요 장점은 무엇이었나요?
A. 더 큰 앞바퀴를 장착하여 속도를 높였다.
B. 체인 구동 방식과 디자인 덕분에 더 안전했습니다.
C. 더 가볍고 휴대하기 쉬웠다.
D. 페니파딩보다 유지보수가 덜 필요했다.
✅ 正确答案
It was safer because of its design and chain drive.