恢复力
Before a Flashback Table operation，you execute the following command： ALTER TABLE employees ENABLE ROW MOVEMENT； Why would you need this to be executed？（） Because row IDs may change during the flashback operation。 Because the object number changes after the flashback operation。 Because the rows are retrieved from the recycle bin during the flashback operation。 Because the table is moved forward and back to a temporary during the flashback opertio。
体育教学除了遵循一般的教学规律外，还要遵循的特殊教育规律是（）（）和（）。
A support specialist started to apply an APAR on a system by inserting the tape into the tape drive， and loaded the fix using smitty installp. The following error message is displayed： tape not in backup format Which of the following will resolve this problem？（） Change density setting to 2。 Set tape device to /dev/rmt0。 Set block size to 0 for variable。 Enable compression on tape device。
根际微生物
采集水样时水样的流量应保持（）
