5.Modern Buildings

Thehighestbuildingconstructedby1975wasSearsRoebuckTowerinChicago.Itis443mtallwith110floors.Ithouses16,500peopleandhas103elevatorsand18escalators.Structuralengineershavecalculatedthatbuildingsupto3kmtallaretechnicallyfeasible.WhyhaveLargeBuildings?Thechief ......     (本文共 8865 字 )     [阅读本文]>>




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