Good morning, everyone. Today we're going to discuss the history of the bicycle. Now, you might think the bicycle was invented in the 19th century, and you'd be right. However, the first two-wheeled vehicle, called a 'velocipede', appeared in France in the 1860s. It had pedals on the front wheel, but no brakes, which made it quite dangerous. Later, in the 1880s, the 'safety bicycle' was introduced in England. This design featured a chain drive to the rear wheel and equal-sized wheels, making it much more stable. Interestingly, the pneumatic tire, which we still use today, was invented in 1888 by a Scottish veterinarian named John Boyd Dunlop, originally to make his son's tricycle more comfortable.
❓ Lợi ích chính của 'xe đạp an toàn' được giới thiệu vào những năm 1880 là gì?
A. A. Nó có bàn đạp ở bánh trước.
B. B. Nó được làm từ những vật liệu nhẹ hơn.
C. C. Nó có bộ truyền động xích và các bánh xe có kích thước bằng nhau, giúp nó ổn định hơn.
D. D. Đây là chiếc xe đạp đầu tiên có phanh.
✅ 正确答案
C. It had a chain drive and equal-sized wheels, making it more stable.