In today's lecture, we'll discuss the history of the bicycle. Early bicycles in the 19th century had wooden frames and iron tires, making them extremely uncomfortable on rough roads. The invention of the pneumatic tire by John Boyd Dunlop in 1888 was a turning point. It greatly improved comfort and speed, leading to a cycling boom. However, it wasn't until the 20th century that bicycles became widely affordable for the general public, thanks to mass production techniques. Interestingly, the safety bicycle, with two equal-sized wheels, emerged in the 1880s and is the design we still use today.
❓ Según la conferencia, ¿cuál era la principal ventaja del neumático neumático de Dunlop?
A. A. Hizo que las bicicletas fueran más baratas de producir.
B. B. Mejoró la comodidad y la velocidad.
C. C. Permitió que se utilizaran marcos de madera.
D. D. Fue el primer diseño con dos ruedas iguales.