Good morning, everyone. Today we're going to discuss the history of the bicycle. Now, many people think the bicycle was invented in the 19th century, but its origins actually go back further. The first known two-wheeled vehicle, called a 'velocipede', appeared in France in the 1790s. However, it had no pedals; riders pushed their feet against the ground. The real breakthrough came in 1860s when pedals were attached to the front wheel. But this design was dangerous because it was easy to tip over. It wasn't until the 1880s that the 'safety bicycle' with a chain drive and two equal-sized wheels became popular, making cycling much safer and more accessible to the public.
❓ ¿Cuál era el principal problema con el diseño del velocípedo en la década de 1790?
A. Era demasiado pesada para montar.
B. No tenía pedales, así que los ciclistas tenían que impulsarse con los pies.
C. Era difícil de manejar.
D. Era demasiado caro de producir.
✅ 正确答案
It had no pedals, so riders had to push with their feet.