Today's lecture is about the history of the bicycle. The first pedal-powered bicycle was invented in the 1830s by a Scottish blacksmith named Kirkpatrick Macmillan. However, it wasn't until the 1880s that the 'safety bicycle' with two equal-sized wheels became popular, making cycling much safer and more accessible. Interestingly, the introduction of the safety bicycle also influenced women's fashion, as it led to the adoption of more practical clothing. By the early 20th century, bicycles had become a major mode of transport for workers, especially in European cities.
❓ 根据讲座内容，为什么“安全自行车”具有重要意义？
A. A. 这是有史以来发明的第一辆自行车。
B. B. 它有两个大小相同的轮子，使其更安全、更受欢迎。
C. C. 它由蒸汽驱动，而非脚踏。
D. D. 它仅被女性用于休闲。
✅ 正确答案
B. It had two equal-sized wheels, making it safer and more popular.