[单选]
Examine the following ALTER command：
SQL> ALTER DISKGROUP dgroup1 UNDROP DISKS；
What is the purpose of the command？（）

A . It cancels all pending disk drops within the disk group.
B . It restores disks that are being dropped as the result of a DROP DISKGROUP operation
C . It mounts disks in the disk group for which the drop-disk operation has already been co pleted
D . It restores all the dropped disks in the disk group for which the drop-disk operation has already been completed
E . It adds previously dropped disks back into the disk grou

Which of the following commands displays the number of system calls per second that are being executed？（） sar。 pstat。 iostat。 filemo。有一宗房地产，评估基准日后第一年的纯收益预计为70万元，资本化率为8%，以后未来各年的纯收益将在上一年的基础上增长1%，则该宗房地产的在永续使用的前提下评估价值最近近于（）。 700万元。 800万元。 1000万元。 1100万元。 During reboot the system hangs with LED 0581 that indicates "Configuring TCP/IP." Which recovery procedures should be taken？（） Boot in maintenance mode， and verify the Ethernet adapter configuration.。 Boot in maintenance mode， access the rootvg and check the /etc/inittab for corruption.。 Boot in maintenance mode， access the rootvg and rebuild the boot image using the bosboot command.。 Boot in maintenance mode after verifying the network connection， access the rootvg and check the /etc/rc.net file.。社会组织 An administrator is attempting to update a software product. The install is interrupted by a system failure. Which of the following commands would be used to clean up the improperly applied filesets（） Ippchk -C。 instfix -S。 installp -c。 installp -C。

Examine the following ALTER command：
SQL> ALTER DISKGROUP dgroup1 UNDROP DISKS；
What is the purpose of the command？（）

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[单选] Examine the following ALTER command： SQL> ALTER DISKGROUP dgroup1 UNDROP DISKS； What is the purpose of the command？（）

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[单选]
Examine the following ALTER command：
SQL> ALTER DISKGROUP dgroup1 UNDROP DISKS；
What is the purpose of the command？（）