Good morning, everyone. Today we're going to discuss the history of the bicycle. Now, many people believe the bicycle was invented in the 19th century, but in fact, the first two-wheeled vehicle, called a draisine, appeared in 1817 in Germany. It had no pedals; riders pushed their feet against the ground. Later, in the 1860s, pedals were added to the front wheel in France. However, it wasn't until the 1880s that the chain drive and pneumatic tires were introduced, making bicycles much more comfortable and efficient. This design quickly became popular worldwide.
❓ 講義によると、自転車を大幅に快適かつ効率的にしたものは何でしょうか？
A. 前轮にペダルを追加すること
B. ドイツにおけるドライジーネの発明
C. チェーンドライブと空気タイヤの導入
D. フレームに軽量素材を使用すること
✅ 正确答案
The introduction of the chain drive and pneumatic tires