Good morning, everyone. Today we're going to discuss the history of the bicycle. The first bicycle, invented in the early 19th century, had no pedals; riders pushed their feet against the ground to move forward. It was called the 'hobby horse.' Later, in the 1860s, pedals were added to the front wheel, creating the 'penny-farthing.' However, these were dangerous because riders sat high above the ground. The modern safety bicycle, with two equal-sized wheels and a chain drive, appeared in the 1880s and became popular due to its stability and ease of use.
❓ 강의에 따르면, 페니파딩 자전거의 주요 문제점은 무엇이었나요?
A. A. 페달이 없었습니다.
B. B. 그것은 너무 무거워서 탈 수 없었다.
C. C. 라이더들은 지면에서 높이 앉아 있어서 위험했다.
D. D. 바퀴 크기가 서로 달라서 안정적이지 않았다.
✅ 正确答案
C. Riders sat high above the ground, making it dangerous.