Good morning, everyone. Today we're going to discuss the history of the bicycle. The first bicycle, invented in the early 19th century, had no pedals and was pushed along by the rider's feet. It was called a 'hobby horse.' Later, in the 1860s, pedals were added to the front wheel, creating the 'velocipede.' However, this design was very uncomfortable due to the rigid frame and wooden wheels. It wasn't until the 1880s that the 'safety bicycle' with two equal-sized wheels and a chain drive became popular, making cycling much safer and more accessible for the general public.
❓ 講義によると、安全自転車の重要な特徴は何でしたか？
A. A. それはペダルがなく、足で蹴って進んだ。
B. B. 大きな前輪と小さな後輪を備えていた。
C. C. それは同じ大きさの二つの車輪とチェーン駆動を備えていた。
D. D. それは完全に木で作られており、とても軽かった。
✅ 正确答案
C. It had two equal-sized wheels and a chain drive