Good morning, class. Today we're discussing the history of the bicycle. As you know, the first two-wheeled vehicle, called a draisine, appeared in 1817 and was propelled by pushing your feet against the ground. Later, in the 1860s, pedals were added to the front wheel, leading to the famous penny-farthing with its huge front wheel. However, it was dangerous because riders sat high above the ground. The major breakthrough came in 1885 when the safety bicycle was introduced, featuring two equal-sized wheels and a chain drive to the rear wheel. This design made cycling much safer and more practical for everyday use.
❓ 1885年推出的安全自行车的主要优势是什么？
A. A. 它比之前的型号更轻。
B. B. 它有一个更大的前轮以提高速度。
C. C. 它因等大的轮子和链条传动而更加安全。
D. D. 可以站立着踩踏板骑行。
✅ 正确答案
C. It was safer due to its equal-sized wheels and chain drive.