Today we're going to discuss the history of the bicycle. The first two-wheeled vehicle, called the draisine, was invented in 1817 by a German baron. It had no pedals; riders pushed their feet against the ground. In the 1860s, pedals were added to the front wheel in France, creating the 'boneshaker'. Later, the high-wheel bicycle became popular in the 1870s, but it was dangerous because of its large front wheel. The modern 'safety bicycle' with equal-sized wheels and a chain drive was introduced in 1885, making cycling much safer and more accessible.
❓ What was the main reason the high-wheel bicycle was considered dangerous?
A. A. It had no brakes.
B. B. Its large front wheel caused instability and falls.
C. C. It was too heavy to control.
D. D. The pedals were attached to the back wheel.
✅ 正确答案
B. Its large front wheel caused instability and falls.