Chicago,USA,today g. New York,1973 SEARS Sears Tower Chicago,US John Hancock Building 本课件版权归作者所有，仅供个人学习使用，请勿转载。4  Chicago, USA, today Source from : http://skyscraperpage.com/ World Trade Center 415m、417m，Steel, New York, 1973 One world Trade Center Three world Trade Center  Sears Tower  Chicago,US  443m，  Tube system  John Hancock Building 本课件版权归作者所有，仅供个人学习使用，请勿转载