Today we're going to discuss the history of the bicycle. The first bicycle, called the draisine, was invented in Germany in 1817. It had no pedals; riders pushed their feet against the ground. Later, in the 1860s, pedals were added to the front wheel, creating the velocipede. However, this design was uncomfortable due to its rigid frame. It wasn't until the 1880s that the safety bicycle, with two equal-sized wheels and a chain drive, became popular, making cycling accessible to more people, especially women.
❓ 是什么让安全自行车更易于被更广泛的人群使用？
A. A. 它没有踏板。
B. B. 它有一个坚固的框架。
C. C. 它有两个大小相同的轮子和一个链条传动装置。
D. D. 它是在德国发明的。
✅ 正确答案
C. It had two equal-sized wheels and a chain drive.