Good morning, everyone. Today we're going to discuss the history of the bicycle. Now, many people think the bicycle was invented in the 19th century, but its earliest form appeared in 1817, when a German inventor created a wooden, two-wheeled device called a 'running machine.' It had no pedals; riders pushed their feet against the ground to move forward. Later, in the 1860s, pedals were added to the front wheel, but the ride was very bumpy. It wasn't until 1885 that the 'safety bicycle' with a chain drive and two equal-sized wheels was introduced, which made cycling much more comfortable and popular.
❓ 1885년에 도입된 안전 자전거의 주요 개선점은 무엇이었나요?
A. A. 그것은 나무 바퀴가 달려 있었다.
B. B. 앞바퀴에 페달이 달려 있었다.
C. C. 그것은 체인 구동 장치와 두 개의 동일한 크기의 바퀴를 가지고 있었다.
D. D. 더 가볍고 접을 수 있었다.
✅ 正确答案
C. It had a chain drive and two equal-sized wheels.