Today we're going to discuss the history of the bicycle. The first bicycle, invented in the early 19th century, was called a 'velocipede'. It had no pedals; riders pushed their feet against the ground to move. Later, in the 1860s, the 'penny-farthing' appeared, with a large front wheel and a small rear wheel. It was fast but dangerous. By the 1880s, the 'safety bicycle' was introduced, featuring two wheels of equal size and a chain drive. This design made cycling much safer and more accessible, leading to a boom in popularity among both men and women.
❓ Xe đạp an toàn có lợi thế lớn nào so với các mẫu xe trước đó?
A. A. Nó nhẹ hơn và dễ mang theo hơn.
B. B. Nó có bộ truyền động xích và các bánh xe có kích thước bằng nhau, giúp an toàn hơn.
C. C. Nó có thể được điều khiển mà không cần dùng tay.
D. D. Đây là mẫu đầu tiên có bàn đạp.
✅ 正确答案
B. It had a chain drive and equal-sized wheels, making it safer.