Good morning, class. Today we're going to discuss the history of the bicycle. Now, many people think the bicycle was invented in the 19th century, but in fact, a primitive version appeared in 1817, invented by a German baron named Karl von Drais. His machine, called the 'running machine,' had no pedals; riders pushed their feet against the ground. It wasn't until the 1860s that pedals were added in France. However, the first practical and widely popular design came in the 1880s with the 'safety bicycle,' which featured equal-sized wheels and a chain drive. This design made cycling much safer and more comfortable, leading to a boom in popularity.
❓ 講義によると、自転車が初めて広く普及したのはいつですか？
A. 1817年、ランニングマシンが発明された。
B. 1860年代、ペダルが追加されたとき。
C. 1880年代、安全自転車の導入に伴い。
D. 19世紀のことであるが、具体的な日付は記されていない。
✅ 正确答案
In the 1880s, with the introduction of the safety bicycle.