Today we're going to discuss the history of the bicycle. The first bicycle, invented in the early 19th century, had no pedals; riders pushed their feet along the ground. This was called a 'hobby horse.' Later, in the 1860s, pedals were added to the front wheel, creating the 'velocipede.' However, it was uncomfortable due to its rigid frame. Then, in the 1880s, the 'safety bicycle' was introduced with two equal-sized wheels and a chain drive, making it much safer and more efficient. This design became the foundation for modern bicycles.
❓ Каким было основное улучшение безопасного велосипеда по сравнению с более ранними моделями?
A. A. У него были педали, прикреплённые к переднему колесу.
B. B. У него было два колеса одинакового размера и цепная передача.
C. C. Он был сделан из более гибкой рамы.
D. D. Для езды на нём не требовалось физических усилий.
✅ 正确答案
B. It had two equal-sized wheels and a chain drive.