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Wk 10 (10 March 1876) Bell Invents The TelephoneThis Week in HistoryAlexander Graham Bell claims to have invented the telephone, but did he? In 1876, Alexander Graham Bell made the first call on an electromagnetic telephone he had built, and went on

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参考范文： This modern life As is shown in the above picture, people sit in front of the computer all day and night, even in their dreams theyre still playing computer games. Such thought-provoking phenomenon is, especially among young people, p

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China's Defense Ministry is pointing the finger at the United States as being responsible for a series of close encounters between Chinese and US jets along China's coastline. At the same time, the China's Defense Ministry is urging the United States

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China's Defense Ministry has asked the US to stop conducting reconnaissance activities close to China to prevent hazardous incidents. Spokesperson Yang Yujun was responding to US claims that two Chinese jet fighters last week unsafely intercepted one

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On a previous Moment of Science we discussed one of the problems with turning yourself invisible. Sure, it sounds like fun. But a little physics showed us that the invisible man couldn't see anything either, because in order to see, light has to inte