Today we're going to discuss the history of the bicycle. In the early 19th century, the first two-wheeled vehicle, called a 'velocipede', was invented in Germany. It had no pedals; riders pushed their feet against the ground. Later, in the 1860s, French inventors added pedals to the front wheel, creating the 'boneshaker'. However, it was very uncomfortable due to its wooden wheels and metal frames. The real breakthrough came in 1885 when John Kemp Starley designed the 'safety bicycle' with a chain drive to the rear wheel and equal-sized wheels, making it much safer and more practical for everyday use.
❓ Según la conferencia, ¿cuál fue la principal ventaja de la bicicleta de seguridad introducida en 1885?
A. Tenía un asiento más cómodo.
B. Era más ligera y rápida que los modelos anteriores.
C. Utilizaba una transmisión por cadena y ruedas de igual tamaño, lo que lo hacía más seguro.
D. Fue la primera bicicleta con pedales.
✅ 正确答案
It used a chain drive and equal-sized wheels, making it safer