Good morning, class. Today we're discussing the history of the bicycle. As you know, the first two-wheeled vehicle, called a draisine, appeared in 1817 and was propelled by pushing your feet against the ground. Later, in the 1860s, pedals were added to the front wheel, leading to the famous penny-farthing with its huge front wheel. However, it was dangerous because riders sat high above the ground. The major breakthrough came in 1885 when the safety bicycle was introduced, featuring two equal-sized wheels and a chain drive to the rear wheel. This design made cycling much safer and more practical for everyday use.
❓ ¿Cuál fue la principal ventaja de la bicicleta de seguridad introducida en 1885?
A. A. Era más ligero que los modelos anteriores.
B. B. Tenía una rueda delantera más grande para la velocidad.
C. C. Era más seguro debido a sus ruedas de igual tamaño y transmisión por cadena.
D. D. Podía pedalearse de pie.
✅ 正确答案
C. It was safer due to its equal-sized wheels and chain drive.