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.
❓ Theo bài giảng, đặc điểm chính của xe đạp an toàn ra đời năm 1885 là gì?
A. A. Nó không có bàn đạp và được đẩy bằng chân.
B. B. Nó có lốp cao su đặc để di chuyển êm ái hơn.
C. C. Nó sử dụng bộ truyền động xích và hai bánh xe có kích thước bằng nhau.
D. D. Đây là chiếc xe đầu tiên có bánh trước lớn hơn bánh sau.
✅ 正确答案
C. It used a chain drive and two equal-sized wheels.