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 bicycle boom in the 1890s. Interestingly, the safety bicycle also played a role in women's liberation, as it gave women greater mobility and freedom.
❓ Según la conferencia, ¿cuál fue la principal ventaja de la bicicleta de seguridad introducida en la década de 1880?
A. A. Tenía una rueda delantera más grande para mayor velocidad.
B. B. Funcionaba mediante una transmisión por cadena y tenía dos ruedas del mismo tamaño, lo que la hacía más segura y cómoda.
C. C. Fue la primera bicicleta en tener pedales, permitiendo a los ciclistas moverse sin tocar el suelo.
D. D. Era más ligera y más barata que los modelos anteriores, lo que la hacía accesible para la clase trabajadora.
✅ 正确答案
B. It was powered by a chain drive and had two equal-sized wheels, making it safer and more comfortable.