Good morning, class. Today we're discussing the history of the bicycle. As you know, the first two-wheeled vehicle, called a draisine, appeared in 1817 and was propelled by pushing your feet against the ground. Later, in the 1860s, pedals were added to the front wheel, leading to the famous penny-farthing with its huge front wheel. However, it was dangerous because riders sat high above the ground. The major breakthrough came in 1885 when the safety bicycle was introduced, featuring two equal-sized wheels and a chain drive to the rear wheel. This design made cycling much safer and more practical for everyday use.
❓ 1885년에 도입된 안전 자전거의 주요 장점은 무엇이었나요?
A. A. 이전 모델들보다 더 가벼웠다.
B. B. 속도를 내기 위해 앞바퀴가 더 컸다.
C. C. 동일한 크기의 바퀴와 체인 구동 방식 덕분에 더 안전했다.
D. D. 서서 페달을 밟을 수 있었다.
✅ 正确答案
C. It was safer due to its equal-sized wheels and chain drive.