In today's lecture, we'll discuss the history of the bicycle. The first verifiable bicycle, called the draisine, was invented by Karl von Drais in 1817. It had no pedals; riders pushed their feet against the ground. Later, in the 1860s, pedals were added to the front wheel, creating the velocipede. However, this design was uncomfortable due to its rigid frame and iron wheels. The major breakthrough came in 1885 when John Kemp Starley introduced the 'Rover' safety bicycle, which featured a chain drive to the rear wheel and equal-sized wheels. This design greatly improved stability and safety, making cycling accessible to the general public.
❓ ¿Cuál fue la principal ventaja de la bicicleta de seguridad Rover introducida en 1885?
A. Fue la primera bicicleta con pedales.
B. Tenía un asiento más cómodo.
C. Era más seguro y más estable debido a su transmisión por cadena y sus ruedas de igual tamaño.
D. Era más ligero y más barato que los modelos anteriores.
✅ 正确答案
It was safer and more stable due to its chain drive and equal-sized wheels.