Good morning, everyone. Today we're going to discuss 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 no brakes, making it dangerous. In the 1880s, John Kemp Starley introduced the 'safety bicycle,' which featured two equal-sized wheels and a chain drive. This design made cycling much safer and more popular. Interestingly, the pneumatic tire, invented by John Boyd Dunlop in 1888, was originally developed for his son's tricycle, but it was quickly adapted for bicycles, greatly improving comfort on rough roads.
❓ 根据讲座内容，19世纪80年代推出的“安全自行车”的主要优势是什么？
A. A. 它装有木制轮子，且没有刹车。
B. B. 这是第一辆脚踏驱动的自行车。
C. C. 它更安全，因为其车轮尺寸相同且采用链条驱动。
D. D. 它是由皮埃尔·米肖发明的。
✅ 正确答案
C. It was safer because of its equal-sized wheels and chain drive.