Today we're going to 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 to move forward. By the 1860s, pedals were added to the front wheel, but this design was unstable. Then, in 1885, the 'safety bicycle' was introduced with a chain drive and two equal-sized wheels, making it much safer. Interestingly, this design also led to a rise in popularity among women, as it allowed them to wear more practical clothing while riding.
❓ 1885년에 도입된 안전 자전거의 주요 특징은 무엇이었나요?
A. A. 페달이 없었습니다.
B. B. 그것은 체인 구동 장치와 두 개의 동일한 크기의 바퀴를 가지고 있었다.
C. C. 그것은 매우 큰 앞바퀴를 가지고 있었다.
D. D. 그것은 오직 남성만을 위해 설계되었다.
✅ 正确答案
B. It had a chain drive and two equal-sized wheels.