Today we're going to discuss the history of the bicycle. Although many people think the bicycle was invented in the 19th century, early prototypes appeared in the 18th century. In 1817, a German inventor created a wooden frame with two wheels, which riders pushed along with their feet. This was called the 'Laufmaschine' or running machine. Later, in the 1860s, pedals were added to the front wheel, leading to the high-wheel bicycle. These were dangerous because riders sat high above the ground. Finally, in 1885, the 'safety bicycle' was introduced, with two equal-sized wheels and a chain drive, making it much safer and more practical.
❓ 하이휠 자전거의 주요 문제점은 무엇이었나요?
A. 타고 가기에는 너무 느렸다.
B. 작은 뒷바퀴 때문에 균형을 잡기가 어려웠다.
C. 라이더들이 지면 위에 너무 높이 앉아 있어서 위험했다.
D. 페달이 없어서 발로 밀어야 했다.
✅ 正确答案
Riders sat too high above the ground, making it dangerous.