Today's lecture is about the history of the bicycle. The first bicycle, invented in the early 19th century, had no pedals and was pushed along by the rider's feet. This design was called a 'hobby horse'. Later, in the 1860s, pedals were added to the front wheel, creating the 'velocipede'. However, it was not until the 1880s that the 'safety bicycle' with two equal-sized wheels and a chain drive became popular. This design made cycling much safer and more comfortable, leading to a boom in bicycle use among the general public, especially for leisure and commuting.
❓ Según la conferencia, ¿cuál fue una característica clave de la 'bicicleta de seguridad' que la hizo popular?
A. A. Tenía una rueda delantera muy grande.
B. B. Tenía pedales conectados a la rueda delantera.
C. C. Tenía dos ruedas del mismo tamaño y una transmisión por cadena.
D. D. Era más ligera y rápida que las bicicletas modernas.
✅ 正确答案
C. It had two equal-sized wheels and a chain drive.