Today's lecture is about 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. This design was called a 'hobby horse'. Later, in the 1860s, pedals were added to the front wheel, creating the 'velocipede'. However, it was not until the 1880s that the 'safety bicycle' with two equal-sized wheels and a chain drive became popular. This design made cycling much safer and more comfortable, leading to a boom in bicycle use among the general public, especially for leisure and commuting.
❓ 講義によると、「安全自転車」が普及した重要な特徴は何でしたか？
A. A. それは非常に大きな前輪を持っていました。
B. B. 前輪にペダルが取り付けられていた。
C. C. それは同じ大きさの二つの車輪とチェーン駆動を備えていた。
D. D. それは現代の自転車よりも軽くて速かった。
✅ 正确答案
C. It had two equal-sized wheels and a chain drive.