Good morning, everyone. Today we're going to discuss the history of the bicycle. Now, many people assume that the bicycle was invented in the 19th century, but in fact, the first two-wheeled vehicle, called a 'draisine', appeared in 1817. It was made of wood and had no pedals; the rider pushed their feet against the ground to move. Later, in the 1860s, pedals were added to the front wheel, creating the 'velocipede'. However, it was not until the 1880s that the chain drive and pneumatic tires were introduced, making bicycles much safer and more comfortable. This led to a boom in cycling popularity, especially among women, as it offered them a new sense of freedom.
❓ Según la conferencia, ¿cuál fue una mejora clave en las bicicletas en la década de 1880?
A. A. La adición de pedales a la rueda delantera
B. B. El uso de marcos y ruedas de madera
C. C. La introducción de la transmisión por cadena y los neumáticos neumáticos
D. D. La invención de la draisina
✅ 正确答案
C. The introduction of chain drive and pneumatic tires