Good morning. Today we're going to discuss the history of the bicycle. The first bicycle, invented in the early 19th century, had no pedals and was propelled by the rider's feet pushing against the ground. It was called a 'hobby horse.' Later, in the 1860s, pedals were added to the front wheel, creating the 'velocipede.' However, this model was uncomfortable due to its rigid frame and wooden wheels. It wasn't until the 1880s that the 'safety bicycle' appeared, featuring two equal-sized wheels and a chain drive, which made riding much easier and safer. This design became the basis for modern bicycles.
❓ ¿Cuál fue la principal ventaja de la bicicleta de seguridad en comparación con los modelos anteriores?
A. A. Tenía ruedas de madera para un viaje más suave.
B. B. Fue el primer modelo en tener pedales.
C. C. Tenía dos ruedas de igual tamaño y una transmisión por cadena, lo que lo hacía más fácil y seguro.
D. D. Podría ser impulsada por los pies del conductor empujando contra el suelo.
✅ 正确答案
C. It had two equal-sized wheels and a chain drive, making it easier and safer.