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 against the ground to move forward. By the 1860s, pedals were added to the front wheel, but this design was unstable. Then, in 1885, the 'safety bicycle' was introduced with a chain drive and two equal-sized wheels, making it much safer. Interestingly, this design also led to a rise in popularity among women, as it allowed them to wear more practical clothing while riding.
❓ ¿Cuál fue una característica clave de la bicicleta de seguridad introducida en 1885?
A. A. No tenía pedales.
B. B. Tenía transmisión por cadena y dos ruedas del mismo tamaño.
C. C. Tenía una rueda delantera muy grande.
D. D. Fue diseñado solo para hombres.
✅ 正确答案
B. It had a chain drive and two equal-sized wheels.