Good morning, everyone. Today we're going to discuss the history of the bicycle. Many people assume the bicycle was invented in the 19th century, but its predecessor, the draisine, appeared in 1817. However, the real breakthrough came in 1885 with the Rover safety bicycle, which had a chain drive and equal-sized wheels. This design made cycling much safer and more accessible, especially for women. By the early 1900s, bicycles became a common mode of transport in European cities. Interestingly, the popularity of bicycles declined with the rise of motor vehicles, but they saw a revival during the oil crisis in the 1970s. So, the bicycle's history is closely tied to social and economic changes.
❓ Lợi thế chính của xe đạp an toàn Rover ra mắt năm 1885 là gì?
A. A. Nó nhẹ hơn so với các mẫu trước đó.
B. B. Nó có bộ truyền động xích và các bánh xe có kích thước bằng nhau, giúp nó an toàn hơn.
C. C. Đây là chiếc xe đạp đầu tiên được sản xuất hàng loạt.
D. D. Nó có thể được gấp lại để dễ dàng cất giữ.
✅ 正确答案
B. It had a chain drive and equal-sized wheels, making it safer.