The First Bicycle The history of the bicycle goes back more than 200 years. In 1791, Count de Sivrac【C1】______on-lookers in

admin2019-03-18  5

问题                             The First Bicycle
   The history of the bicycle goes back more than 200 years. In 1791, Count de Sivrac【C1】______on-lookers in a park in Paris as he showed【C2】______his two-wheeled invention, a machine called the celerifere. It was basically an【C3】______version of a children’s toy which had been in use for many years. Sivrac’s "celerifere" had a wooden frame, made in the【C4】______of a horse, which was mounted on a wheel at either end. To ride it, you sat on a small seat, just like a modern bicycle, and pushed【C5】______against the【C6】______with your legs—there were no pedals. It was impossible to steer a celerifere and it had no brakes, but despite these problems the invention very much【C7】______to the fashionable young men of Paris. Soon they were【C8】______races up and down the streets.
   Minor【C9】______were common as riders at tempted a final burst of【C10】______Controlling the machine was difficult, as the only way to change【C11】______was to pull up the front of the " celerifere" and【C12】______it round while the front wheel was spinning in the air. " Celeriferes" were not popular for long, 【C13】______, as the【C14】______of no springs, no steering and rough roads made riding them very uncomfortable. Even so, the wooden celerifere was the【C15】______of the modern bicycle.
【C10】

选项 A、velocity
B、energy
C、pace
D、speed

答案D

解析 此处表示“最后猛一冲刺”,一定是速度很快,除了B选项之外的三个选项都有“速度”之意,velocity意为“速率,速度”,为科学用语,pace意为“步调,步法”,speed意为“速度”,是常用词,故选D。
转载请注明原文地址:https://kaotiyun.com/show/HH9q777K
0

最新回复(0)