An operator wants to view all the scheduled jobs on a system. Which of the following locations would house scheduled jobs?（）
第1题：
A. /etc/var/spool
B. /var/spool/cron
C. /var/sched/jobs
D. /usr/sched/crontabs
第2题：
As operator of a 199 GT towing vessel sailing foreign，it shall be your duty to enter in the Official Logbook or other permanent record ______.
A.all information contained on the barge's Certificate of Inspection
B.the condition of all towing gear to be used
C.all navigational aids to be used
D.the barges load line and draft readings
第3题：
A. Plays
B. play
C. to be playing
D. for play
第4题：
At the（）of the police, those people ran off in all directions.
第5题：
Which message categories cannot be disabled by the GMDSS radio operator ________．
A.Navigational Warnings
B.Meteorological Warnings
C.Search and Rescue Information
D.All of the above
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. GRANT select ON dept TO ALL_ USER;
B. GRANT select ON dept TO ALL;
C. GRANT QUERY ON dept TO ALL_USERS
D. GRANT select ON dept TO PUBLIC;
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：
Derek has created a view in the products.nsf database. Derek wants the markup column in the view to display the selling price of the cost. He wants this value to display in currency. Which one of the following should derekl do? （）