Good morning. Today we're going to discuss the history of the bicycle. While many people credit the 19th-century inventors for its creation, the first two-wheeled vehicle actually appeared in 1817, invented by a German baron named Karl von Drais. His machine, called the 'draisine', had no pedals; riders pushed their feet against the ground to move. Later, in the 1860s, pedals were added to the front wheel in France. Interestingly, the iconic high-wheeled 'penny-farthing' became popular in the 1870s, but it was dangerous because riders sat high above the ground. It wasn't until the 1880s that the safety bicycle, with two equal-sized wheels and a chain drive, made cycling accessible to the general public.
❓ Theo bài giảng, một nhược điểm lớn của xe đạp 'bánh to bánh nhỏ' (penny-farthing) là gì?
A. A. Nó quá đắt đối với hầu hết mọi người để mua.
B. B. Nó không có phanh và rất khó điều khiển.
C. C. Người cưỡi ngồi cao trên mặt đất, khiến việc này trở nên nguy hiểm.
D. D. Nó yêu cầu người điều khiển phải đẩy chân dọc theo mặt đất.
✅ 正确答案
C. The rider sat high above the ground, making it dangerous.