Following a successful migration，it is highly recommended that concurrent Volume Groups be Converted to enhanced concurrent capable Volume Groups. In order to follow this recommendation，what step must be completed first？（）
A. The Volume Groups must be changed with chvg -E vgname.
B. The Volume Groups must be a member of a resource group and must be varied on al nodes of the cluster.
C. The Volume Groups must be a member of a resource group and must be varied off all nodes of the cluster.
D. The Volume Grups cannot be changed to enhanced concurrent capable because they must be recreated with mkvg -C vgname.
小儿在方药施养中，下列哪项应禁忌（）
A. 顾护脾胃
B. 用药轻巧
C. 慎用大辛大热
D. 药食相当
E. 体虚即可大补
Which command will change the user webserver’s shell toksh93？（）
A. chshell -ksh93 webserver
B. chsh webserver /usr/bin/ksh93
C. chuser -a shell=/usr/bin/ksh93 webserver
D. setuid -a SHELL=/usr/bin/ksh93 -u webserver
请说明在Solaris系统vi模式下，键入“q”所起的作用（）
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