Good morning. Today we're going to look at the history of the bicycle, focusing on its early development. The first verifiable bicycle was invented in Germany in 1817 by Karl von Drais. It was made entirely of wood and had no pedals; riders pushed their feet against the ground to move. This machine was called the 'running machine' or 'draisine.' However, it wasn't until the 1860s in France that pedals were added to the front wheel, creating the 'velocipede.' Interestingly, despite its popularity among young men, the velocipede was difficult to ride because of its heavy iron frame and hard rubber tires. It wasn't until the 1880s, with the invention of the chain drive and pneumatic tires, that bicycles became practical for ordinary people.
❓ 강의에 따르면, 벨로시페드의 주요 단점은 무엇이었나요?
A. A. 페달이 없었다.
B. B. 그것은 나무로 만들어졌다.
C. C. 무거운 프레임 때문에 타기가 어려웠다.
D. D. 그것은 오직 노인들 사이에서만 인기가 있었다.
✅ 正确答案
C. It was difficult to ride due to its heavy frame.