Good morning, class. Today we're discussing the history of the bicycle. The first pedal-powered bicycle was invented in the 1860s by a French blacksmith named Pierre Michaux. However, it had wooden wheels and a heavy iron frame, making it difficult to ride. In 1885, John Kemp Starley introduced the 'safety bicycle' with a chain drive and equal-sized wheels, which was much more stable. This design became wildly popular and is the basis for modern bicycles. Interestingly, the original word 'bicycle' comes from French, combining 'bi-' meaning two and 'kyklos' meaning circle, referring to the two wheels.
❓ Según la conferencia, ¿cuál era la principal ventaja de la bicicleta de seguridad introducida en 1885?
A. Era más ligero debido a las ruedas de madera.
B. Tenía transmisión por cadena y ruedas de igual tamaño para una mejor estabilidad.
C. Fue inventado por un herrero francés.
D. Fue la primera bicicleta con dos ruedas.
✅ 正确答案
It had a chain drive and equal-sized wheels for better stability.