Good morning, everyone. Today we're going to discuss the history of the bicycle. The first bicycle, invented in the early 19th century, had no pedals and was pushed along by the rider's feet. Later, in the 1860s, pedals were added to the front wheel, but this design was unstable. It wasn't until the 1880s that the 'safety bicycle' with two equal-sized wheels and a chain drive became popular. This design made cycling much safer and more efficient, leading to a boom in bicycle use, especially among women, who gained greater freedom of movement.
❓ What was the main advantage of the safety bicycle mentioned in the lecture?
A. It was cheaper to produce than earlier models.
B. It allowed riders to travel faster than before.
C. It was safer and more efficient due to its chain drive and equal wheels.
D. It could be used on rough roads without difficulty.
✅ 正确答案
It was safer and more efficient due to its chain drive and equal wheels.