In today's lecture, we're discussing the history of the bicycle. The first practical bicycle, known as the 'velocipede', was invented in the 1860s in France. It had wooden wheels and pedals attached directly to the front wheel, which made it difficult to ride. Later, in the 1870s, the 'penny-farthing' became popular, featuring a large front wheel and a small rear wheel. However, it was dangerous because riders sat high above the ground. The modern safety bicycle, with two equal-sized wheels and a chain drive, emerged in the 1880s, making cycling much safer and more accessible to the general public.
❓ 根据讲座内容,前轮大后轮小的自行车的主要问题是什么?
A. A. 它的木制轮子坐起来很不舒服。
B. B. 由于直接连接,踩踏板很困难。
C. C. 骑手们高高地坐在离地面很远的地方,这使得情况十分危险。
D. D. 对大多数人来说,它太贵了,买不起。
✅ 正确答案
C. Riders sat high above the ground, making it dangerous.