본문내용
At the end of the 19th century, the second Industrial Revolution is just going on and large-scale factory production replaces large-scale mechanical production, also the world enteres the age of electricity from the age of steam. So the invention of electricity dramatically changes people's way of life. At the same time, a series of capitalist countries emerges monopolistic capitalist system, externally, the period of the October Revolution in Russia and the Second World War
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