Today we're going to discuss the history of the bicycle. While many people think of it as a modern invention, the first two-wheeled vehicle appeared in the early 19th century. However, it wasn't until the 1880s that the 'safety bicycle' with equal-sized wheels and a chain drive became popular. This design made riding much safer and more efficient, leading to a boom in cycling. Interestingly, the pneumatic tire, invented by John Boyd Dunlop in 1888, was originally developed to make his son's tricycle more comfortable, but it was soon adopted for bicycles, greatly improving ride quality.
❓ 1880年代に安全自転車が人気を博した主な理由は何でしたか？
A. A. それは以前のモデルよりも安く生産できた。
B. B. それは等しい大きさの車輪とチェーン駆動を備えており、より安全で効率的でした。
C. C. 空気入りタイヤを初めて採用した自転車だった。
D. D. それはレース競技のために特別に設計されたものでした。
✅ 正确答案
B. It had equal-sized wheels and a chain drive, making it safer and more efficient.