Good morning. Today we're going to look at the history of the bicycle. Now, many people think the bicycle was invented in the 19th century, and that's partly true. The first two-wheeled vehicle, called the 'draisine', appeared in 1817, but it had no pedals. You pushed it along with your feet. Then, in the 1860s, pedals were added to the front wheel, creating the 'velocipede'. However, this was very uncomfortable because of the solid rubber tires. It wasn't until 1885 that the 'safety bicycle' was developed, with a chain drive and two equal-sized wheels, making it much safer and more practical for everyday use.
❓ 강의에 따르면, 1885년에 소개된 안전 자전거의 주요 특징은 무엇이었나요?
A. A. 페달이 없었고 발로 밀었다.
B. B. 부드러운 주행을 위해 고무 타이어가 장착되어 있었다.
C. C. 그것은 체인 구동 장치와 크기가 같은 두 개의 바퀴를 사용했다.
D. D. 앞바퀴가 뒷바퀴보다 더 컸던 최초의 차량이었다.
✅ 正确答案
C. It used a chain drive and two equal-sized wheels.