Good morning, everyone. Today we're going to discuss the history of the bicycle. As you know, the modern bicycle has two wheels of equal size, but early versions were quite different. The first two-wheeled vehicle, invented in 1817 by Baron Karl von Drais, was called a 'running machine' or 'draisine'. It had no pedals; riders pushed their feet against the ground to move forward. Later, in the 1860s, pedals were added to the front wheel, leading to the 'penny-farthing' with a very large front wheel. Interestingly, this design made the ride faster but also more dangerous. It wasn't until the 1880s that the 'safety bicycle' with a chain drive and equal-sized wheels became popular, which is the basis for today's bikes.
❓ Đặc điểm chính của xe đạp 'bánh to bánh nhỏ' (penny-farthing) là gì?
A. Nó không có bàn đạp và được đẩy bằng chân.
B. Nó có một bánh trước rất lớn và bàn đạp gắn liền với nó.
C. Nó sử dụng bộ truyền động xích và các bánh xe có kích thước bằng nhau.
D. Nó được phát minh bởi Nam tước Karl von Drais vào năm 1817.
✅ 正确答案
It had a very large front wheel and pedals attached to it.