Today we're going to discuss the history of the bicycle. In the early 19th century, the first two-wheeled vehicle, called a 'draisine', was invented by Karl von Drais. It had no pedals; riders pushed their feet against the ground to move. Later, in the 1860s, pedals were added to the front wheel, creating the 'velocipede'. However, this design was uncomfortable due to its rigid frame. By the 1880s, the 'safety bicycle' with a chain drive and two equal-sized wheels became popular, making cycling safer and more accessible, especially for women.
❓ What was a major improvement of the 'safety bicycle' compared to earlier designs?
A. It had a more comfortable seat.
B. It used a chain drive and equal-sized wheels, making it safer.
C. It was lighter and easier to carry.
D. It could be ridden without using hands.
✅ 正确答案
It used a chain drive and equal-sized wheels, making it safer.