Today we're going to discuss the history of the bicycle. While many people assume the bicycle was invented in the 19th century, its origins actually go back further. The first two-wheeled, pedal-less vehicle, called a draisine, appeared in 1817 in Germany. It was propelled by pushing feet against the ground. Later, in the 1860s, pedals were added to the front wheel in France. However, these early bicycles were difficult to ride because of their heavy wooden frames and lack of rubber tires. It wasn't until the 1880s, with the introduction of the safety bicycle featuring equal-sized wheels and a chain drive, that cycling became popular among the general public. This design, combined with pneumatic tires, made rides smoother and safer.
❓ 是什么让自行车在19世纪80年代在普通大众中流行起来?
A. A) 在前轮上增加踏板
B. B) 使用木制框架和铁制轮胎
C. C) 引入等尺寸车轮和链条传动
D. D)德国发明了德莱西纳自行车
✅ 正确答案
C) The introduction of equal-sized wheels and a chain drive