2. 外语
  3. The First Bicycle The history of the bicycle goes back more than 200 years.In 1791, Count de Sivrac【C1】______onlookers in a

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

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问题                                 The First Bicycle
    The history of the bicycle goes back more than 200 years.In 1791, Count de Sivrac【C1】______onlookers in a park in Paris as he showed【C2】______his two-wheeled invention 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】______werecommonasridersattemptedafinalburstof【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。
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