下面哪条命令是用来提交事务的（)。

A . A、Save B . B、Rollback C . C、Commit D . D、Update

A . LST UCELL B . DSP UCELL C . LST LOCELL D . DSP LOCELL

A . full duplex B . duplex on C . set duplex on full D . duplex full E . duplex auto

A . cp file1/dev/null B . touch file1 C . create file1 D . mkfile file1

A . ADD CNACLD B . MOD CNACLD C . RMV CNACLD D . SET CNACLD

A . pms B . pll C . rssi D . bsp

A . cdhls B . cdhch C . cdhrm D . cdhver

A . undebug all B . no all C . nodebug all D . debugno all

A . A、halt B . B、reboot C . C、shut down D . D、shut down-F

A . cdhls B . cdhch C . cdhrm D . cdhver

A . NTCOI：SNT=ET1551-2，SNTP=XM-0-0-0，SNTV=1，MODE=2048，PROT=1； B . NTCOI：SNT=ET1551-2，SNTP=MUX34-0-0，SNTV=1，MODE=2048，PROT=1； C . NTCOI：SNT=ET1551-2，SNTP=TSM-0-0，SNTV=1，MODE=4096，PROT=0； D . NTCOI：SNT=ET1551-2，SNTP=XM-0-0-0，SNTV=1，MODE=4096，PROT=1；

A . ldd B . ldso C . modprobe D . ldconfig

A . Switch#show running-config B . Switch#show startup-config C . Switch>show running-config D . Switch>show startup-config

A . shutdown B . shutdown immediate C . shutdown abort D . shutdown nomount

A . A、showmem B . B、freemem C . C、swAp D . D、free

A . A、userADD －u B . B、show DefAults C . C、showuser DefAults D . D、userADD -D

A . permit access-group101out B . permit access-list101out C . ip access-group101out D . ip access-list101out

A . cp myfile /dev/null B . touch myfile C . create myfile D . mkfile myfile

A . A、arp B . B、netstat C . C、traceroute D . D、iostat

A . set transaction B . commit C . savepoint D . rollback

A．EXPALMLOG B．EXPBTSDEVFILE C．EXPDEVFILE D．EXPCFGMML

A．showipospfborder-router B．showipospfdatabase C．showipospfneighbor D．showipospfinterface