Today we're going to discuss the history of the bicycle. In the early 19th century, the first two-wheeled vehicle, called a 'draisine', was invented by Karl von Drais. It had no pedals; riders pushed their feet against the ground to move. Later, in the 1860s, pedals were added to the front wheel, creating the 'velocipede'. However, this design was uncomfortable due to its rigid frame. By the 1880s, the 'safety bicycle' with a chain drive and two equal-sized wheels became popular, making cycling safer and more accessible, especially for women.
❓ '안전 자전거'가 이전 디자인에 비해 크게 개선된 점은 무엇이었나요?
A. 좌석이 더 편안했습니다.
B. 체인 구동과 동일한 크기의 바퀴를 사용하여 더 안전했습니다.
C. 더 가볍고 휴대하기 쉬웠다.
D. 손을 사용하지 않고도 탈 수 있었다.
✅ 正确答案
It used a chain drive and equal-sized wheels, making it safer.