Today we're going to discuss the history of the bicycle. The first bicycle, invented in the early 19th century, had no pedals and was pushed along by the rider's feet. It wasn't until the 1860s that pedals were added to the front wheel. However, this design was unstable and difficult to ride. In 1885, the 'safety bicycle' was introduced with a chain drive and two equal-sized wheels, making it much safer and more efficient. This design quickly became popular, and by the 1890s, cycling had become a widespread leisure activity, especially among women who gained new freedom of movement.
❓ 1885年に導入された安全自転車の大きな改良点は何でしたか？
A. A. それはペダルがなく、足で蹴って進むものだった。
B. B. それはチェーン駆動で、同じ大きさの二つの車輪を備えていた。
C. C. 速度を出すために非常に大きな前輪を備えていた。
D. D. それは軽く、簡単に折りたたむことができた。
✅ 正确答案
B. It had a chain drive and two equal-sized wheels.