The master may，at his/her discretion，turn off the AIS if he/she believes that it may compromise the safety or security of the vessel
Under no circumstances shall AIS be turned off while underway as this could endanger the vessel and those around her
AIS is always required to be operating if the vessel is in or in the vicinity of a VTS area
AIS is always required to be operating if the vessel is within 100 nautical miles of the coastline
第1题：
A. It enables all system triggers.
B. It allows only SYSDBA connections.
C. It ensures that all job queues remain active during the upgrade process.
D. It sets system initialization parameters to specific values that are required to enable database upgrade scripts to be run.
第2题：
A. The default administrative distance is used.
B. The command is used to establish a static route.
C. The command is used to configure the router interfaces.
D. The command is used to establish a stub network.
E. The subnet mask for the source address is 255.255.255.0
第3题：
Which of the statements regarding benefit-cost analysis in the Special window are true?
A . 1 and 2
B . 2 and 3
C . 1 and 3
D . 1, 2 and 3
E . None of the above.
第4题：
Which two statements are true regarding the starting of the database instance using the following command?（） SQL>STARTUP UPGRADE
第5题：
Which of the following is true regarding Label Distribution Protocol （LDP）？（）
第6题：
A. Either the -a or flag -b may be used, but not both.
B. If the flag -a is used then the flag -b also must be used.
C. One of the -a or -b flags must be used, but not both at the same time.
D. Both the flags may be used together, but neither are mandatory.
第7题：
Which of the following statements is TRUE regarding crane operations ________．
A.Radio communications allow the crane operator to disregard the use of hand signals
B.The crane operators and signalman must be familiar with the correct hand signals
C.The forward cranes can be operated from the bridge
D.The aft cranes can be operated from the aft steering station
第8题：
Which of the following statements is true? Accounts payable are ______.
A．debts owed to suppliers
B．related to purchases of goods on an open account
C．current liabilities
D．all of the above
第9题：
Which of the following statements is true regarding the VERSIONS BETWEEN clause？（）
第10题：
Which statement is true regarding the INTERSECT operator?（）