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← HistoryWhich material behavior posed the greatest limitation to Song Dynasty iron suspension bridge construction?
A)Iron's yield strength under tension✓
B)Iron's brittleness at lower temperatures
C)Iron's electrochemical corrosion in moist air
D)Iron's transition into amorphous phase
💡 Explanation
Yield strength was critical because exceeding it causes permanent deformation under load rather than fracture immediately; therefore, the cables would droop over time because exceeding the elastic limit from creep would reduce their effectiveness, rather than outright breaking them.
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