John Hancock Center is an experiment in engineering in terms of using()for the first.
John Hancock Center is an experiment in engineering in terms of using()for the first.
A.glass wall
B.exoskeleton
C.structural steel
D.tower crane
正确答案:exoskeleton
John Hancock Center is an experiment in engineering in terms of using()for the first.
A.glass wall
B.exoskeleton
C.structural steel
D.tower crane
正确答案:exoskeleton
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