Good morning, everyone. Today we're going to discuss the history of the bicycle. Now, many people think the bicycle was invented in the 19th century, but its origins actually go back further. In 1817, a German inventor named Karl von Drais created a two-wheeled machine called the 'Draisine', which had no pedals. Riders pushed themselves along with their feet. It wasn't until the 1860s that pedals were added, in France. However, the real breakthrough came in 1885 when John Kemp Starley designed the 'Rover Safety Bicycle', which had a chain drive and equal-sized wheels. This design made cycling much safer and more practical, leading to a boom in popularity.
❓ 講義によると、ローバー・セーフティ自転車の初期のデザインに対する主な利点は何でしたか?
A. A. 前輪にペダルが取り付けられていた。
B. B. それはより軽く、持ち運びやすかった。
C. C. 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。
D. D. 収納のために折りたたむことができた。
✅ 正确答案
C. It used a chain drive and equal-sized wheels, making it safer.