Good morning, everyone. Today we're going to look at the history of the bicycle. Now, many people think the bicycle was invented in the 19th century, but in fact, a simple two-wheeled vehicle appeared as early as 1790 in France. However, it had no pedals; you pushed it along with your feet. The first pedal-driven bicycle was developed in Scotland in 1839 by a blacksmith named Kirkpatrick Macmillan. Interestingly, his design was not widely copied because the pedals were attached to the front wheel, which made steering difficult. It wasn't until the 1870s that the 'penny-farthing' with a large front wheel became popular, especially among young men. But it was dangerous, so eventually, the safety bicycle, with two equal-sized wheels and a chain drive, was introduced in 1885, and that's the design we still use today.
❓ 강의에 따르면, 1839년 맥밀런의 자전거의 주요 문제점은 무엇이었나요?
A. A. 페달이 없었습니다.
B. B. 페달이 앞바퀴에 부착되어 있어서 조향이 어려웠다.
C. C. 너무 무거워서 탈 수 없었다.
D. D. 그것은 오직 젊은 남성들 사이에서만 인기가 있었다.
✅ 正确答案
B. The pedals were attached to the front wheel, making steering difficult.