Good morning, everyone. 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 crude version appeared as early as the 1790s in France. However, it had no pedals; riders pushed their feet against the ground. The first pedal-driven bicycle was developed in Scotland in 1839 by a blacksmith named Kirkpatrick Macmillan. Interestingly, his invention was not widely adopted because of concerns about safety and the poor condition of roads. It wasn't until the 1880s, with the introduction of the safety bicycle, which had equal-sized wheels and a chain drive, that cycling became popular among the general public.
❓ 강의에 따르면, 커크패트릭 맥밀런의 페달 구동 자전거가 널리 채택되지 못한 이유는 무엇인가요?
A. A. 생산하기에 너무 비쌌다.
B. B. 안전 문제와 열악한 도로 상태가 있었다.
C. C. 해당 디자인은 특허를 받지 않았다.
D. D. 사람들은 이전 프랑스어 버전을 선호했다.
✅ 正确答案
B. There were safety concerns and poor road conditions.