Good morning, everyone. Today we're going to discuss the history of the bicycle. Now, many people believe that the bicycle was invented in the 19th century, but its origins actually go back further. The first two-wheeled vehicle, called a draisine, appeared in 1817 in Germany. It had no pedals, and riders pushed their feet against the ground to move. Later, in the 1860s, pedals were added to the front wheel in France, creating what we now call the velocipede. However, this design was quite uncomfortable because of its rigid frame and iron wheels. It wasn't until the 1880s that the modern safety bicycle, with a chain drive and two equal-sized wheels, became popular. This design made cycling much safer and more efficient.
❓ 前轮驱动自行车(Velocipede)的一个主要问题是什么?
A. A. 它太重了,无法骑上坡。
B. B. 它没有刹车装置来停止。
C. C. 由于其坚硬的框架和铁轮,乘坐起来很不舒适。
D. D. 对于普通人来说,它太昂贵了。
✅ 正确答案
C. It was uncomfortable due to its rigid frame and iron wheels.