The cross-sectional area of each column is the same. Under the same conditions, the stability of the column is the best when the column adopts the cross-sectional shape shown in fig. （ ）.[img=549x158]1803a2588a00e24.jpg[/img]
A: （a）
B: （b）
C: （c）
D: （d）
A: （a）
B: （b）
C: （c）
D: （d）
举一反三
- The slender column is under axial compressive load P, the critical load [img=23x22]1803a0faa055141.png[/img] is independent of ( ). A: the material of the column B: the length of the column C: the magnitude of the P D: the shape and dimension of the cross section of the column
- For the columns with the same length, material, constraint conditions and cross-sectional area, etc., the stability of which kind of shape of cross-section (see the following figures)is best ? . And the stability of which is worst? .http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/64415e4a30114dd688f87cc28116d571.png
- A column in journals and ledger accounts used to cross reference journal and ledger entries is the__________. A: account balance column B: debit column C: posting reference column D: credit column E: description column
- Under the same material conditions, as the flexibility increases, ( ). A: The critical stress of the long column decreases while that of the medium flexibility bar remains unchanged. B: The critical stress of the intermediate column decreases while that of the large flexibility bar remains unchanged. C: The critical stress of the large and the intermediate column are both decreased. D: The critical stress of the large and the intermediate column are both unchanged.
- Choose the definition from Column B that best matches each word in Column A.