Today's lecture is about 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. This design was called a 'hobby horse'. Later, in the 1860s, pedals were added to the front wheel, creating the 'velocipede'. However, it was not until the 1880s that the 'safety bicycle' with two equal-sized wheels and a chain drive became popular. This design made cycling much safer and more comfortable, leading to a boom in bicycle use among the general public, especially for leisure and commuting.
❓ Согласно лекции, какой ключевой особенностью «безопасного велосипеда», которая сделала его популярным?
A. A. У него было очень большое переднее колесо.
B. B. У него были педали, прикреплённые к переднему колесу.
C. C. У него было два колеса одинакового размера и цепная передача.
D. D. Он был легче и быстрее современных велосипедов.
✅ 正确答案
C. It had two equal-sized wheels and a chain drive.