Today we're discussing the history of the bicycle. In the early 19th century, the first two-wheeled vehicle, called the 'draisine', was invented by Karl von Drais. It had no pedals; riders pushed their feet against the ground. Later, in the 1860s, pedals were added to the front wheel, creating the 'velocipede'. However, this design was uncomfortable due to its rigid frame and iron wheels. By the 1880s, the 'safety bicycle' with a chain drive and two equal-sized wheels became popular, offering a smoother and safer ride. Interestingly, this design led to a boom in cycling, especially among women, as it allowed for more practical clothing.
❓ An toàn hơn vì người lái có thể chạm chân xuống đất khi cần.
A. A. Nó có bánh trước lớn hơn để đạt tốc độ cao.
B. B. Nó thoải mái và an toàn hơn khi đi.
C. C. Nó đòi hỏi ít nỗ lực thể chất hơn để giữ thăng bằng.
D. D. Nó rẻ hơn để sản xuất so với xe đạp velocipede.