Good morning, class. Today we're going to discuss the history of the bicycle. The first bicycle, called the 'Draisine', was invented in 1817 by a German baron. It had no pedals, so riders had to push their feet against the ground to move forward. In the 1860s, pedals were added to the front wheel, creating the 'velocipede'. However, this was uncomfortable due to its rigid frame. Later, in 1885, the 'safety bicycle' was introduced with a chain drive and two equal-sized wheels, making it much safer and more practical. This design became the basis for modern bicycles.
❓ ¿Cuál fue la principal ventaja de la bicicleta de seguridad introducida en 1885?
A. A. Tenía pedales conectados a la rueda delantera.
B. B. Era más ligera y más fácil de llevar.
C. C. Tenía transmisión por cadena y ruedas de igual tamaño, lo que la hacía más segura.
D. D. Requería que los jinetes se impulsaran con los pies.
✅ 正确答案
C. It had a chain drive and equal-sized wheels, making it safer.