Today we're going to discuss the history of the bicycle. In the early 19th century, the first two-wheeled vehicle, called a 'draisine', was invented by Karl von Drais. It had no pedals; riders pushed their feet against the ground to move. Later, in the 1860s, pedals were added to the front wheel, creating the 'velocipede'. However, this design was uncomfortable due to its rigid frame. By the 1880s, the 'safety bicycle' with a chain drive and two equal-sized wheels became popular, making cycling safer and more accessible, especially for women.
❓ ¿Cuál fue una mejora importante de la 'bicicleta de seguridad' en comparación con los diseños anteriores?
A. Tenía un asiento más cómodo.
B. Utilizaba una transmisión por cadena y ruedas de igual tamaño, lo que lo hacía más seguro.
C. Era más ligero y más fácil de llevar.
D. Se podía montar sin usar las manos.
✅ 正确答案
It used a chain drive and equal-sized wheels, making it safer.