Inventors and their Inventions New inventions are appearing every day to make

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问题 Inventors and their Inventions
New inventions are appearing every day to make our lives easier, longer, warmer, speedier and so on. But only a few inventors design a new machine or product that be comes so well-known that the invention, named after its creator, becomes a household word. Here are four famous inventors and the invention that are named after them:
1. John Bowler, a London hatter who designed the hard round hat known as the bowler in about 1850 . It has become the symbol of a respectable British man.
2. Louis Braille (1809—1952), born in France. He was blind as a child. In 1924 he developed his own alphabet patterns known as Braille by which the blind could read by touch.
3. Rudolf Diesel (1858—1913), a German engineer who invented the diesel engine in 1897 and so began a transport revolution in cars, lorries and trains.
4. Charles Rolls, a car salesman who with the engineer Henry Royce created the world famous Rolls-Royce car.
                                                   Inventors and their Inventions
Our lives are made easier, longer, warmer and speedier by  (46)  . A few inventions were named after their inventors. Here are some:
inventors description inventions
John Bowler The  (47)  hat bowler
Louis Braille His own  (48)  Braille
Rudolf Diesel An engine that began a transport revolution  (49)
Charles Rolls The world-famous car  (50)  car [br]

选项

答案 hard round

解析文章中说，bowler是一种圆顶硬礼帽，这一部分是对发明的描述，所缺少的是对hat的修饰语，故选用hard round才符合原义。

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