5.Modern Buildings

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