Good morning, class. Today we're discussing the history of the bicycle. As you know, the first two-wheeled vehicle, called a draisine, appeared in 1817 and was propelled by pushing your feet against the ground. Later, in the 1860s, pedals were added to the front wheel, leading to the famous penny-farthing with its huge front wheel. However, it was dangerous because riders sat high above the ground. The major breakthrough came in 1885 when the safety bicycle was introduced, featuring two equal-sized wheels and a chain drive to the rear wheel. This design made cycling much safer and more practical for everyday use.
❓ Lợi thế chính của xe đạp an toàn ra mắt năm 1885 là gì?
A. A. Nó nhẹ hơn so với các mẫu trước đó.
B. B. Nó có bánh trước lớn hơn để đạt tốc độ cao.
C. C. Nó an toàn hơn nhờ bánh xe có kích thước bằng nhau và bộ truyền động xích.
D. D. Nó có thể được đạp trong khi đứng lên.
✅ 正确答案
C. It was safer due to its equal-sized wheels and chain drive.