Good morning, everyone. Today we're going to discuss the history of the bicycle. As you know, the bicycle has evolved significantly since its invention. The first two-wheeled vehicle, called the draisine, was invented in 1817 by Karl von Drais. It had no pedals; riders pushed their feet against the ground to move. Later, in the 1860s, pedals were added to the front wheel, creating the velocipede. However, these early models were uncomfortable because of their wooden frames and metal wheels. It wasn't until the 1880s that the safety bicycle, with two equal-sized wheels and a chain drive, became popular, making cycling safer and more accessible to the general public.
❓ 1860년대에 발명된 벨로시페드의 주요 문제점은 무엇이었나요?
A. 페달이 없었다.
B. 너무 빨랐어.
C. 나무 프레임과 금속 바퀴 때문에 불편했습니다.
D. 그것은 크기가 서로 다른 두 개의 바퀴를 가지고 있었다.
✅ 正确答案
It was uncomfortable due to its wooden frame and metal wheels.