Today, we're discussing the history of the bicycle. While many people think of the penny-farthing as an early design, it was actually the 'safety bicycle' in the 1880s that made cycling popular. The key innovation was the chain drive, which allowed the pedals to turn the rear wheel, enabling smaller front wheels and a lower seat. This made the bicycle much safer, especially for women, who could now ride in long skirts. Interestingly, the pneumatic tire, invented by John Boyd Dunlop in 1888, was originally developed to make his son's tricycle more comfortable, not for racing. However, it quickly improved speed and comfort on rough roads.
❓ ¿Cuál era la principal ventaja de la bicicleta de seguridad sobre los diseños anteriores?
A. Tenía una rueda delantera más grande para mayor velocidad.
B. Utilizaba una transmisión por cadena que permitía una rueda delantera más pequeña y un asiento más bajo.
C. Fue la primera bicicleta en tener pedales.
D. Fue inventado específicamente para mujeres motociclistas.
✅ 正确答案
It used a chain drive allowing a smaller front wheel and lower seat.