Good morning. Today we're going to discuss the history of the bicycle. The first two-wheeled vehicle, called the Draisienne, was invented in 1817 by Karl von Drais. It had no pedals; riders pushed their feet against the ground. Then in the 1860s, pedals were added to the front wheel, creating the velocipede. However, it was extremely uncomfortable due to its rigid frame and iron wheels. The real breakthrough came in 1885 with John Kemp Starley's Rover Safety Bicycle, which featured a chain drive to the rear wheel and equal-sized wheels. This design made cycling much safer and more efficient, and it became the template for modern bicycles.
❓ ローバー・セーフティ・バイシクルの主な利点は、それ以前のモデルと比べて何でしたか？
A. A. それはより軽く、持ち運びやすかった。
B. B. 後輪へのチェーンドライブと等しいサイズの車輪を備えていた。
C. C. 前輪にペダルが取り付けられた最初の自転車だった。
D. D. 耐久性を高めるために鉄製の車輪を使用した。
✅ 正确答案
B. It had a chain drive to the rear wheel and equal-sized wheels