Today we're going to discuss the history of the bicycle. The first bicycle, called the draisine, was invented in Germany 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. It wasn't until the 1880s that the safety bicycle, with two equal-sized wheels and a chain drive, became popular, making cycling accessible to more people, especially women.
❓ 안전 자전거가 더 넓은 인구층에게 접근 가능하게 만든 요인은 무엇인가?
A. A. 페달이 없었다.
B. B. 그것은 견고한 프레임을 가지고 있었다.
C. C. 그것은 크기가 같은 두 개의 바퀴와 체인 구동 장치를 갖추고 있었다.
D. D. 그것은 독일에서 발명되었다.
✅ 正确答案
C. It had two equal-sized wheels and a chain drive.