A: The σcr value of the long column is independent of the material
B: The σcr value of the intermediate column is independent of the flexibility
C: The σcr value of the intermediate column is independent of the material
D: The σcr value of the small flexibility column is independent of the flexibility
举一反三
- Among the following conclusions about the critical stress σcr of the compressive column, the correct one is ( ) A: The σcr value of the long column is independent of the material B: The σcr value of the intermediate column is independent of the flexibility C: The σcr value of the intermediate column is independent of the materia D: The σcr value of the small flexibility column is independent of the flexibility
- 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.
- 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
- HBase的物理结构为row，column family，column，timestamp :value。
- 14 In triple sequence table of sparse matrix, each triple represents ( ). A: the row number,column number and data value of non-zero elements in the matrix B: the data value of non-zero elements in the matrix C: the row and column numbers of elements in the matrix D: the row number,column number and data value of elements in the matrix
内容
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A column that fails due to normal stress, is called ( ) A: short column B: long column C: weak column D: medium column
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Ignoring sales tax, which of the following are the correct entries to post the total of the discounts received column in the cash book to the general ledger? A: DR discounts received, CR Purchases B: DR Payables control account, CR Discounts received C: DR Purchases, CR Discounts received D: DR Discounts received, CR Payable control account
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According to Euler's column theory, the crippling load of a column is given by [img=128x27]18032d66b024c7f.png[/img]. In this equation, the value of μ for a column with both ends hinged, is ( ) A: 0.25 B: 0.5 C: 1.0 D: 2.0
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You are modifying a table named Product in a SQL Server 2005 database. You want to add a new column named FriendlyName to the Product table. A friendly name for each product will be stored in this column. The table currently contains data. Thesales department has not yet created a friendly name for each product. FriendlyName is a required value for each product. You want to add this new column by using the least amount of effort. What should you do？（） A: Define the new column as NUL B: Update the FriendlyName column to the same valueas the productName column. Alter the FriendlyName column to be NOT NUL C: D: Define the new column as NOT NULL with a default value of ’Undefined.’ E: Define the new column as NUL F: Use application logic to enforce the data constraint. G: Define the new column as NULL with a default value of ’Undefined.’
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Which one of the followings columns has the highest column efficiency? A: packed column B: WCOT column C: SCOT column D: PLOT column