Today we're going to discuss the history of the bicycle. In the early 19th century, the first two-wheeled vehicle, called a 'draisine', was invented by Karl von Drais. It had no pedals; riders pushed their feet against the ground to move. Later, in the 1860s, pedals were added to the front wheel, creating the 'velocipede'. However, this design was uncomfortable due to its rigid frame. By the 1880s, the 'safety bicycle' with a chain drive and two equal-sized wheels became popular, making cycling safer and more accessible, especially for women.
❓ 「安全自転車」は、それ以前の設計と比べて、どのような大きな改善点があったのでしょうか？
A. 座り心地がより快適だった。
B. それはチェーン駆動と同サイズの車輪を使用しており、より安全でした。
C. それはより軽く、持ち運びやすかった。
D. 手を使わずに乗ることができた。
✅ 正确答案
It used a chain drive and equal-sized wheels, making it safer.