You are managing an ASM instance. You previously issued the following statements： ALTER DISKGROUP dg1 DROP DISK disk2； ALTER DISKGROUP dg1 DROP DISK disk3； ALTER DISKGROUP dg1 DROP DISK disk5； You want to cancel the disk drops that are pending for the DG1 disk group. Which statement should you issue？（） ALTER DISKGROUP dg1 UNDROP disk2，disk3，disk5。 ALTER DISKGROUP dg1 UNDROP。 ALTER DISKGROUP dg1 UNDROP DISKS。 You cannot cancel the pending disk dro。
量油，要提前通知哪个岗（） 锅炉岗。 发电岗。 地质化验岗。
You are maintaining your database in Oracle10g. You want to store the information about the backup of the database in the control file. You issue the following statement： SQL>ALTER SYSTEM SET CONTROL_FILE_RECORD_KEEP_TIME=400； What is the outcome of this statement？ （） The statement will not execute successfully.。 The statement will execute successfully， and the backups metadata will be maintained in the control file for 400 days。 The statement will execute successfully， and the backups metadata will be maintained in the recovery catalog for 400 days.。 Backups will be deleted from the media after 400 days.。
选择垫片材料的首要条件是考虑垫片的（） 抗渗透性。 耐温性。 抗压性。 耐蚀性。
下列一战过程中的著名战役，发生在东线的是（）。 马恩河战役。 凡尔登战役。 索姆河战役。 俄军夏季攻势。
Given：
What is the result？（）
