Operator needs to remove all leading comments # from shell.script file. Which of the following vi sub-command can achieve this?（）
第1题：
A. cd /adm
B. cd ./adm
C. cd ../adm
D. cd /../adm
第2题：
A. :r/^#//g
B. :1,$ s/^#//g
C. :sed s/^#//g
D. :sub s/^#//g
第3题：
Use regex to remove all html tags from a file.
第4题：
Finally, a wire brush should be used on all bare （）to remove the last of the scale.
第5题：
In order to discharge a CO2 portable fire extinguisher, the operator must FIRST ______.
A.invert the CO2 extinguisher
B.squeeze the two trigger handles together
C.remove the locking pin
D.open the discharge valve
第6题：
A. mv /home/operator .
B. mv /home/operator/* .
C. mv /home/operator ../..
D. mv /home/operator/all ../home/operator
第7题：
Which maintenance functions can a GMDSS Radio Operator perform ________．
A.The Operator can make fine internal adjustments to the transmitter as long as the output power does not change by more than one percent
B.The Operator is responsible for ensuring that INMARSAT antennas are free of built-up soot and clear of obstacles
C.All levels of maintenance must be performed by a licensed GMDSS Radio Maintainer
D.The Operator may install an EPROM in order to ensure that the equipment continues to operate within legal constraints
第8题：
A. Remove network connections
B. Remove the RAM
C. Self ground on the computer case
D. Disconnect power to PC
第9题：
It is the responsibility of the crane operator to, at all times, be aware of the location of the __.
A.load
B.hook
C.boom
D.All of the above
第10题：
Before the（）of the derrick, check all the tackle closely.