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 wasn't until the 1860s that pedals were added to the front wheel. However, this design was unstable and difficult to ride. In 1885, the 'safety bicycle' was introduced with a chain drive and two equal-sized wheels, making it much safer and more practical. This design quickly became popular, and by the 1890s, bicycles were mass-produced, allowing ordinary people to travel independently for the first time.
❓ 1885年の「安全自転車」は、それ以前の設計と何が異なっていたのでしょうか？
A. A. それはペダルがなく、足で蹴って進むものだった。
B. B. 前輪にペダルが取り付けられていた。
C. C. それはチェーン駆動と、同じ大きさの二つの車輪を備えていた。
D. D. それは量産された最初の自転車でした。
✅ 正确答案
C. It had a chain drive and two equal-sized wheels.