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 propelled by pushing your feet against the ground. It was called a 'hobby horse'. Later, in the 1860s, pedals were added to the front wheel, creating the 'velocipede'. However, this design was uncomfortable due to its rigid frame and wooden wheels. In the 1880s, the 'safety bicycle' was introduced, featuring a chain drive and two equal-sized wheels, which made it much safer and more efficient. Interestingly, the safety bicycle design remained largely unchanged for over a century, and it became incredibly popular among both men and women, contributing to greater social mobility.
❓ ¿Cuál era la principal ventaja de la 'bicicleta de seguridad' sobre los modelos anteriores?
A. A. Tenía ruedas de madera, lo que la hacía más ligera.
B. B. Tenía transmisión por cadena y ruedas de igual tamaño para mayor seguridad.
C. C. Fue el primer modelo en tener pedales.
D. D. Funcionaba con un pequeño motor.
✅ 正确答案
B. It had a chain drive and equal-sized wheels for safety.