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.
❓ Согласно лекции, какой была ключевая особенность безопасного велосипеда?
A. A. У него не было педалей, и его толкали ногами.
B. B. У него было большое переднее колесо и маленькое заднее колесо.
C. C. У него было два колеса одинакового размера и цепная передача.
D. D. Он был сделан целиком из дерева и был очень лёгким.
✅ 正确答案
C. It had two equal-sized wheels and a chain drive