Good morning, everyone. Today we're going to discuss the history of the bicycle. The first pedal-powered bicycle was invented in the 1860s, but it had a major flaw: the pedals were attached directly to the front wheel, making it difficult to steer. In the 1870s, the 'penny-farthing' became popular, but its large front wheel made it unstable. It wasn't until the 1880s that the 'safety bicycle' with a chain drive and equal-sized wheels was introduced, which is similar to modern bicycles. This design greatly improved stability and safety, leading to a cycling boom in the 1890s.
❓ Согласно лекции, в чём заключалась основная проблема первого велосипеда с педальным приводом?
A. A. У него не было тормозов.
B. B. Педали были прикреплены к переднему колесу, что вызывало трудности с управлением.
C. C. Он был слишком тяжёлым.
D. D. У него была цепная передача, которая часто ломалась.
✅ 正确答案
B. The pedals were attached to the front wheel, causing steering difficulties.