Today we're going to discuss the history of the bicycle. While many people think of the bicycle as a relatively modern invention, its origins actually date back to the early 19th century. The first two-wheeled vehicle, called a 'draisine' or 'hobby horse', was invented by Karl von Drais in 1817. It had no pedals; riders pushed their feet against the ground to move forward. The next major development came in the 1860s when pedals were added to the front wheel, creating the 'velocipede'. However, these early bikes were uncomfortable and difficult to ride. It wasn't until the 1880s that the 'safety bicycle' with a chain drive and two equal-sized wheels was introduced, which closely resembles modern bicycles and became extremely popular.
❓ 칼 폰 드라이스가 발명한 '드라이진'의 주요 특징은 무엇이었나요?
A. A. 앞바퀴에 페달이 연결되어 있었다.
B. B. 그것은 발로 땅을 밀어서 움직였다.
C. C. 그것은 체인 구동 시스템을 사용했다.
D. D. 그것은 두 개의 같은 크기의 바퀴를 가지고 있었다.
✅ 正确答案
B. It was powered by pushing feet against the ground.