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该柱的初始偏心距、附加偏心距接近下列()组数值?

该柱的初始偏心距、附加偏心距接近下列()组数值?
A.487mm,20.78mm
B.473.68mm,20.78mm
C.478mm,16.42mm
D.473.68mm,16.42mm
正确答案:A
标签:数值