Today we're discussing the history of the bicycle. One key development was the 'safety bicycle' in the 1880s, which had two equal-sized wheels and a chain drive. This design made cycling much safer than the earlier 'penny-farthing', which had a huge front wheel and was prone to tipping over. The safety bicycle's popularity grew rapidly, especially among women, as it allowed for more practical clothing. However, it wasn't until the 1890s that pneumatic tires were added, greatly improving comfort and speed. This innovation led to a cycling boom across Europe and North America.
❓ 안전자전거가 페니파딩보다 더 안전했던 이유는 무엇인가요?
A. A. 앞바퀴가 더 컸다
B. B. 그것은 크기가 같은 두 개의 바퀴와 체인 드라이브를 갖추고 있었다.
C. C. 더 가볍고 휴대하기 쉬웠다
D. D. 처음부터 공기 타이어를 장착하고 있었다.
✅ 正确答案
B. It had two equal-sized wheels and a chain drive