ответе на вопросы плз малю 1)why couldn't people build really tall buildings in the past? 2)when could people start building skyscrapers? 3)how did the invention of the elevator change the history of buildings? 4)why did people want to build skyscrapers in cities? 5)why are tall buildings called 'skyscrapers'? 6)how fast did the empire state building grow? 7) what can you find in the triumoh of astana in kazakhstan

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