We are now going to look at the history of the bicycle. The first bicycle, invented in the early 19th century, had no pedals; riders pushed their feet against the ground to move forward. Later, in the 1860s, pedals were added to the front wheel, but this design was unstable and difficult to ride. It wasn't until the 1880s that the 'safety bicycle' appeared, featuring two equal-sized wheels and a chain drive to the rear wheel. This design made cycling much safer and more comfortable, and it quickly became popular among both men and women. Today, the basic design of the safety bicycle remains largely unchanged.
❓ What was the key improvement of the 'safety bicycle' introduced in the 1880s?
A. It had a larger front wheel for faster speed.
B. It had pedals attached to the front wheel.
C. It had two equal-sized wheels and a chain drive to the rear wheel.
D. It was lighter and could be folded for easy storage.
✅ 正确答案
It had two equal-sized wheels and a chain drive to the rear wheel.