Today we're going to discuss the history of the bicycle. While many people think of it as a modern invention, the first two-wheeled vehicle appeared in the early 19th century. However, it wasn't until the 1880s that the 'safety bicycle' with equal-sized wheels and a chain drive became popular. This design made riding much safer and more efficient, leading to a boom in cycling. Interestingly, the pneumatic tire, invented by John Boyd Dunlop in 1888, was originally developed to make his son's tricycle more comfortable, but it was soon adopted for bicycles, greatly improving ride quality.
❓ ¿Cuál fue la razón principal de la popularidad de la bicicleta de seguridad en la década de 1880?
A. A. Era más barato de producir que los modelos anteriores.
B. B. Tenía ruedas de igual tamaño y transmisión por cadena, lo que la hacía más segura y eficiente.
C. C. Fue la primera bicicleta en utilizar neumáticos.
D. D. Fue diseñado específicamente para competiciones de carreras.
✅ 正确答案
B. It had equal-sized wheels and a chain drive, making it safer and more efficient.