Good morning. Today we're going to look at the history of the bicycle. Now, many people think the bicycle was invented in the 19th century, and that's partly true. The first two-wheeled vehicle, called the 'draisine', appeared in 1817, but it had no pedals. You pushed it along with your feet. Then, in the 1860s, pedals were added to the front wheel, creating the 'velocipede'. However, this was very uncomfortable because of the solid rubber tires. It wasn't until 1885 that the 'safety bicycle' was developed, with a chain drive and two equal-sized wheels, making it much safer and more practical for everyday use.
❓ Согласно лекции, какой ключевой особенностью обладал безопасный велосипед, представленный в 1885 году?
A. A. У него не было педалей, и его толкали ногами.
B. B. Он был оснащён цельными резиновыми шинами для более плавной езды.
C. C. Он использовал цепную передачу и два колеса одинакового размера.
D. D. Это был первый транспорт, у которого переднее колесо было больше заднего.
✅ 正确答案
C. It used a chain drive and two equal-sized wheels.