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.
❓ 1885年に登場した安全自転車の重要な特徴は何でしたか？
A. A. ペダルがなかった。
B. B. それはチェーン駆動であり、同じ大きさの二つの車輪を備えていた。
C. C. それは非常に大きな前輪を備えていた。
D. D. それは男性専用に設計されていた。
✅ 正确答案
B. It had a chain drive and two equal-sized wheels.