Today we're discussing the history of the bicycle. The first pedal-powered bicycle was invented in Scotland in 1839 by Kirkpatrick Macmillan. However, it wasn't until the 1880s that the 'safety bicycle' with two equal-sized wheels became popular. This design, which featured a chain drive to the rear wheel, made cycling much safer and more accessible. Interestingly, the pneumatic tire, invented by John Boyd Dunlop in 1888, was originally developed for his son's tricycle, not for bicycles. By the early 20th century, bicycles had become a major mode of transport in Europe and North America, especially for workers commuting to factories.
❓ ¿Cuál fue la principal ventaja de la 'bicicleta de seguridad' introducida en la década de 1880?
A. A. Era más barato de producir que los modelos anteriores.
B. B. Tenía una transmisión por cadena que la hacía más rápida.
C. C. Era más seguro y más accesible debido a las ruedas de igual tamaño.
D. D. Fue la primera bicicleta en utilizar neumáticos.
✅ 正确答案
C. It was safer and more accessible due to equal-sized wheels.