Good morning, everyone. Today we're going to discuss the history of the bicycle. Now, most people think the bicycle was invented in the 19th century, but its origins actually go back further. The first two-wheeled vehicle, called a draisine, was created by a German baron, Karl von Drais, in 1817. It had no pedals; riders pushed their feet against the ground. Later, in the 1860s, pedals were added to the front wheel in France, leading to the 'boneshaker'. However, the major breakthrough came in 1885 when John Kemp Starley introduced the 'Rover' safety bicycle, which had a chain-driven rear wheel and equal-sized wheels, making it much safer and more practical. This design became the basis for modern bicycles.
❓ Согласно лекции, в чём заключалось главное новшество безопасного велосипеда Rover?
A. A. Это был первый велосипед с педалями.
B. B. Он использовал цепь для привода заднего колеса и имел колёса одинакового размера.
C. C. Он был сделан целиком из дерева и не имел металлических частей.
D. D. Это было первое двухколёсное транспортное средство, изобретённое в 1817 году.
✅ 正确答案
B. It used a chain to drive the rear wheel and had equal-sized wheels.