下列不属于静压轴承油膜建立的条件是（）。 旋转速度。 供油压力。 负载大小。 轴向力。
宏基站的地阻要求为（）以下，边际站的地阻应为10欧姆以下。 5欧姆。 10欧姆。 5.5欧姆。 6欧姆。
What does the ABC designation include for inventory items？ （） Quantity reserved in stock。 Quantity expired for a particular Lot。 Count Frequency in number of days。 Activity Based Costing in capital dollar。
On Jan 11， 2005 at 2：30 P.M.， an erroneous update operation modified all the values of column LASTNAME in the EMPLOYEE table in the Scott schema to an empty string. You are the system administrator， and you want to return the original values in the table. To do so， you decided to flash back the table. Which two options can you use to flash back a table？（） by using Oracle Enterprise Manager。 by issuing the FLASHBACK TABLE statement at the RMAN prompt。 by issuing the FLASHBACK TABLE statement at the SQL prompt。 by issuing the FLASHBACK TABLE statement at the LSNRCTL prompt。
You executed the following command to create a tablespace called SALES_DATA： > CREATE TABLESPACE sales_data DATAFILE SIZE 100M SEGMENT SPACE MANAGEMENT AUTO； Which two statements are true about the SALES_DATA tablespace （） The database automatically determines the extent-sizing policy for the tablespace.。 The segments are automatically shrunk when the contents are removed from them.。 The allocation of extents within the tablespace is managed through the dictionary tables.。 The space utilization description of the data blocks in segments is recorded inbitmapblocks.。 The space utilization description of the data blocks in segments is managed through free lists.MANUAL。
下列为构成物流向量的三个数量特征之一的是（）
