Today we're going to discuss the history of the bicycle. Early bicycles in the 19th century had wooden wheels and no pedals; riders pushed their feet along the ground. The first major improvement came in the 1860s with the addition of pedals to the front wheel. However, these 'penny-farthings' were dangerous because of their large front wheel. In 1885, the 'safety bicycle' was introduced with two equal-sized wheels and a chain drive, making it much more stable. Later, pneumatic tires were added, which greatly improved comfort and speed. By the early 20th century, bicycles became affordable for the general public.
❓ What was the main advantage of the safety bicycle over earlier models?
A. It had wooden wheels
B. It had a larger front wheel
C. It was more stable due to equal-sized wheels and a chain drive
D. It was cheaper to produce
✅ 正确答案
It was more stable due to equal-sized wheels and a chain drive