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Consider the following configuration：   /devices/diskP1 is a member of disk group grp1.        /devices/diskP2 is a member of disk group grp1.        /devices/diskP3 is a member of disk group grp1.        /devices/diskP4 is a candidate disk.        /devices/diskQ1 is a member of disk group grp2.        /devices/diskQ2 is a member of disk group grp2.        /devices/diskQ3 is a member of disk group grp2.        /devices/diskQ4 is a candidate disk.   Which command will add the disk /devices/diskP4 to the disk group， grp1？（）  
A: ALTER DISKGROUP grp1  ADD DISK ’/devices/diskP1’，  ADD DISK ’/devices/diskP4’；
B: ALTER DISKGROUP grp1  ADD DISK ’/devices/disk*4’；
C: ALTER DISKGROUP grp1  ADD DISK ’/devices/diskP*’；
D: ALTER DISKGROUP grp1  ADD DISK ’/devices/diskQ*’，  ADD DISK ’/devices/diskP*’；

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出自：Oracle认证

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