牛津译林版高中英语选修七unit1livingwithtechnology文化背景inventions内容摘要：
toy made by connecting the two ends of a string to the bottoms of two metal cans, paper cups or similar items. Electromagic transmitters and receivers Antonio Meucci An early version of the telephone was invented around 1860 by Antonio Meucci who called it teletrofono (telectrophone). The first American demonstration of Meucci39。 s invention took place in Staten Island, New York in 1854. In 1860, a description of it was published in New York39。 s Italian language newspaper. Meucci invented a paired electromagic transmitter and receiver, where the motion of a diaphragm modulated a signal in a coil by moving an el。阅读剩余 0%
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