Good morning, everyone. Today we're going to discuss the history of the bicycle. The first bicycle, called the 'dandy horse', was invented in 1817 by a German baron. It had no pedals, and riders pushed themselves along with their feet. Later, in the 1860s, pedals were added to the front wheel, creating the 'velocipede'. However, this design was uncomfortable and difficult to ride. The breakthrough came in 1885 when John Kemp Starley introduced the 'safety bicycle', which had a chain drive and two equal-sized wheels. This design is the basis for modern bicycles. Interestingly, the safety bicycle became popular quickly, especially among women, as it offered a more practical and dignified mode of transport.
❓ Según la conferencia, ¿cuál era la principal ventaja de la bicicleta de seguridad sobre los diseños anteriores?
A. A. Era más ligero y más fácil de llevar.
B. B. Tenía transmisión por cadena y ruedas de igual tamaño, lo que la hacía más segura y cómoda.
C. C. Podía plegarse para almacenamiento.
D. D. Fue la primera bicicleta en tener pedales.
✅ 正确答案
B. It had a chain drive and equal-sized wheels, making it safer and more comfortable