Today we're going to discuss the history of the bicycle. While many people think of it as a modern invention, the first two-wheeled vehicle appeared in the early 19th century. However, it wasn't until the 1880s that the 'safety bicycle' with equal-sized wheels and a chain drive became popular. This design made riding much safer and more efficient, leading to a boom in cycling. Interestingly, the pneumatic tire, invented by John Boyd Dunlop in 1888, was originally developed to make his son's tricycle more comfortable, but it was soon adopted for bicycles, greatly improving ride quality.
❓ Какова была основная причина популярности безопасного велосипеда в 1880-х годах?
A. A. Его производство было дешевле, чем у более ранних моделей.
B. B. Он имел колёса одинакового размера и цепной привод, что делало его более безопасным и эффективным.
C. C. Это был первый велосипед с пневматическими шинами.
D. D. Он был разработан специально для гоночных соревнований.
✅ 正确答案
B. It had equal-sized wheels and a chain drive, making it safer and more efficient.