Today's lecture is about the history of the bicycle. Although early prototypes appeared in the 19th century, the modern bicycle with pedals and a chain was developed in the 1880s. This design, known as the 'safety bicycle', became popular because it was much safer than the earlier 'penny-farthing', which had a very large front wheel. Interestingly, the safety bicycle also played a key role in the women's liberation movement, as it gave women greater personal mobility. By the early 20th century, bicycles had become a common means of transport in many cities.
❓ Theo bài giảng, ưu điểm lớn của 'xe đạp an toàn' so với các mẫu xe trước đó là gì?
A. Nó nhẹ hơn và dễ mang theo hơn.
B. Đi xe thì an toàn hơn.
C. Sản xuất rẻ hơn.
D. Nó có thể được sử dụng trên những con đường gồ ghề.