Which of the following are characteristics of the steel structure?
A. High strength and low weight
B. Good plasticity and toughness
C. easy to manufacture and construct
D. Weak corrosion resistance
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The steel structure is suitable for which of the following ( ).
A. Bridges
B. High-rise buildings
C. Spatial structures
D. Pressure vessels
Which of the following countries was the first to use iron structures in the world?
America
B. China
C. British
D. Egypt
The material requirements of steel structures are ( ).
A. High tensile strength and yield strength
Better plasticity and toughness
C. Good process performance
D. Weak corrosion resistance
Ferrum content accounts for steel is ( ).
A. 90%
B. 95%
C. 99%
D. 100%
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