- A.单选题如图5-4-8所示截面对其水平形心轴的惯性矩为( )。
- B. A 、
- C. B 、
- D. C 、
- E. D 、
A 、pi (d)^4/64C. B 、pi (d)^4/64D. C 、pi (d)^4/64E. D 、pi (d)^4/64
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