Good morning, everyone. Today we're going to discuss the history of the bicycle. Now, you might think the bicycle was invented in the 19th century, and you'd be right. However, the first two-wheeled vehicle, called a 'draisine', appeared in 1817, invented by a German baron. It had no pedals; riders pushed their feet against the ground. Later, in the 1860s, pedals were added to the front wheel in France. But these early bicycles had wooden frames and iron wheels, making rides extremely bumpy. It wasn't until the 1880s that the 'safety bicycle' with a chain drive and two equal-sized wheels became popular, which is closer to what we ride today.
❓ Nhược điểm chính của những phương tiện hai bánh đầu tiên được đề cập trong bài giảng là gì?
A. Chúng quá nặng để cưỡi.
B. Chúng không có bàn đạp và cần phải đẩy bằng chân.
C. Chúng có khung gỗ dễ gãy.
D. Chúng chỉ được sử dụng bởi các nam tước Đức.
✅ 正确答案
They had no pedals and required pushing with feet.