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  • 科目:英语
  • 题型:未知题型
  • 难度:中等
  • 人气:135

If you had to choose the single most important ___________(discover) of the 20th century, you would have a real _________ on your hands. In just 100 years, the world changed completely. Amazing discoveries were made in medicine, communications and transport, not to ____________ our knowledge of the world and space. Medical advances ________  from discovering the causes of diseases under microscopes to surgical procedures ____________(replace) __________(disease) organs with ________ (donate) ones. Communications changed ______ the introduction of mobile phones and the way we __________(通信) went ________ writing letters to emailing. We started flying around the world and ____________(同时), scientists figured ________ how to ______(劈开) the atom,________(过去) thought to be the smallest particle of matter ______  the universe.

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If you had to choose the singl