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.
❓ 강의에 따르면, 자전거가 처음으로 널리 보급된 것은 언제인가요?
A. 1817년, 러닝 머신이 발명되었을 때.
B. 1860년대에 페달이 추가되었을 때입니다.
C. 1880년대, 안전 자전거의 도입과 함께.
D. 19세기에, 그러나 구체적인 날짜는 언급되지 않았다.
✅ 正确答案
In the 1880s, with the introduction of the safety bicycle.