Good morning. Today we're going to look at the history of the bicycle. Now, many people think the bicycle was invented in the 19th century, and that's partly true. The first two-wheeled vehicle, called the 'draisine', appeared in 1817, but it had no pedals. You pushed it along with your feet. Then, in the 1860s, pedals were added to the front wheel, creating the 'velocipede'. However, this was very uncomfortable because of the solid rubber tires. It wasn't until 1885 that the 'safety bicycle' was developed, with a chain drive and two equal-sized wheels, making it much safer and more practical for everyday use.
❓ 講義によると、1885年に導入された安全自転車の重要な特徴は何でしたか？
A. A. それはペダルがなく、足で蹴って進むものだった。
B. B. より滑らかな乗り心地のために、固体ゴムタイヤを装着していた。
C. C. それはチェーンドライブと二つの同じ大きさの車輪を使用していた。
D. D. 前輪が後輪よりも大きい最初の車両であった。
✅ 正确答案
C. It used a chain drive and two equal-sized wheels.