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.
❓ Lý do chính khiến xe đạp bánh cao được coi là nguy hiểm là gì?
A. A. Nó không có phanh.
B. B. Bánh trước lớn của nó gây mất ổn định và té ngã.
C. C. Nó quá nặng để có thể điều khiển.
D. D. Bàn đạp được gắn vào bánh sau.
✅ 正确答案
B. Its large front wheel caused instability and falls.