In today's lecture, we'll discuss the history of the bicycle. The first two-wheeled vehicle, called the draisine, was invented in Germany in 1817. It had no pedals; riders pushed their feet against the ground to move. Later, in the 1860s, French inventors added pedals to the front wheel, creating the velocipede. However, this design was uncomfortable due to its rigid frame and wooden wheels. It wasn't until the 1880s that the modern safety bicycle, with a chain drive and equal-sized wheels, became popular, making cycling safer and more accessible for everyone.
❓ 강의에 따르면, 벨로시페드의 주요 문제점은 무엇이었나요?
A. 언덕을 오르기에는 너무 무거웠다.
B. 브레이크가 없었다.
C. 그것의 틀은 딱딱하고 바퀴는 나무로 되어 있어 불편함을 초래했다.
D. 대부분의 사람들에게 너무 비쌌다.
✅ 正确答案
Its frame was rigid and wheels were wooden, causing discomfort.