单选题When can routine communications be resumed when radio silence has been imposed?（）AAfter determining that the frequency or channel appears to be no longer in useBAfter determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communicationsCRoutine communications can resume after the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concludedDIf，in the Master's opinion，communications on that frequency will interfere with emergency communications
单选题
When can routine communications be resumed when radio silence has been imposed?（）
A
After determining that the frequency or channel appears to be no longer in use
B
After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communications
C
Routine communications can resume after the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded
D
If，in the Master's opinion，communications on that frequency will interfere with emergency communications
参考解析
解析：
暂无解析
相关考题：
发生火情时，客人们能用电梯吗?A.Can guests use the stairs when a fire appears?B.Can guests use the elevators when a fire presents?C.Can guests use the lifts when a fire occurs?D.Can guests use the ladders when a fire breaks up?
24． Which of the following is TRUE?A． When he talks or sings, Jay Chou can both speak clearly．B． When he sings, Jay Chou can-t speak clearly． When he talks, he can't, either．C． When he talks, Jay Chou can-t speak clearly． But when he sings, he can．D． When he sings, Jay Chou can't speak clearly． But when he talks, he can．
BRadio and television are very popular in the world today． Millions of people watch TV．Perhaps more people listen to the radio．The TV is，of course，more useful than the radio． On TV you can see and hear what is hap-pening in the world．Now radio is still with us． And the number of listeners is becoming larger． One reason for this is the invention of the transistor(半导体) radio． A transistor radio is sometimes very small． It is very easy to carry． You can put one in your pocket and listen to it on the bus or on your bike when you go to work． It is better．for blind people． The sight(视力J) of many old peo-ple is not good enough to watch TV． Then，when people are working，they can't watch TV， but they can listen to music or news over the radio． What-s more，radio is much cheaper than TV．( )26． Radio and television__________ in the modern world today．A． are both widely usedB． are both expensiveC． have been changed a lotD． are used for learning things
29．__________ when you are on the bus or bike．A． Radio can be listenedB．TV can be watchedC． Radio can be listened toD． TV can be used
The retired worker resumed his task of servicing the buses without additional pay when he ________at home. A. could stayB. could have stayedC. can stayD. must have stayed
At a dinner, you can begin to eatA、when the guests sitting beside you begin.B、when the hostess says, "Let's begin."C、when the main course is served.D、when the hostess picks up her own spoon or fork..
In an Ethernet network, under what two scenarios can devices transmit?() A. when they receive a special tokenB. when there is a carrierC. when they detect no other devices are sendingD. when the medium is idleE. when the server grants access
What does the underlined sentence "So when it goes down, you go down with it." mean?A. When computer doesn't work, you cannot work too.B. When computer falls down, you fall down with it.C. When computer is working, you can do nothing.D. You can sell ticket without asking the computer.
When should the emergency position-indicating radio beacon be activated after abandoning an OSV ________．A.ImmediatelyB.After one hourC.Only when another vessel is in sightD.Only after sunset
When the GMDSS Radio Operator on watch hears“SECURITE”spoken three times he can expect to receive a message concerning ______．A.The safety of navigation or important meteorological warningsB.The safety of a vessel or a person is in jeopardyC.A vessel in need of immediate assistanceD.A coast station traffic list
For GMDSS，when may a compulsory vessel not be allowed to leave port ________．A.When the vessel is in an overloaded conditionB.When the vessel has arranged for both duplication of equipment AND shore-based maintenanceC.When the vessel has replaced a required piece of GMDSS-related equipment but its performance has not been verified or loggedD.When the vessel is carrying only two licensed GMDSS Radio Operators and is capable of performing all required functions
When can routine communications be resumed on a frequency or channel on which radio silence has been imposed ________．A.After determining that the frequency or channel appears to be no longer in useB.After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communicationsC.After the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concludedD.Routine communications can resume if，in the Master's opinion，communications on that frequency or channel will not interfere with emergency communications
--Philip has gone to New Zealand. --Oh, can you tell me ___________?A.when did he leaveB.when he is leavingC.when he leftD.when is he leaving
In an Ethernet network, under what two scenarios can devices transmit?（）A、when they receive a special tokenB、when there is a carrierC、when they detect no other devices are sendingD、when the medium is idleE、when the server grants access
When using the WLSE to verify RF coverage， which task will use the configured radio settings？（）A、Frame MonitoringB、Radio ScanC、Self-HealingD、Client Walkabout
For which three events can web application event listeners be registered？（）A、When a session is createdB、After a servlet is destroyedC、When a session has timed outD、When a cookie has been createdE、When a servlet has forwarded a requestF、When a session attribute value is changed
Which two statements are true regarding the SQL Repair Advisor？（） A、 The SQL Repair Advisor can be invoked to tune the performance of the regressed SQL statements.B、 The SQL Repair Advisor can be invoked even when the incident is not active for a SQL statement crash.C、 The SQL Repair Advisor is invoked by the Health Monitor when it encounters the problematic SQL statement.D、 The DBA can invoke the SQL Repair Advisor when he or she receives an alert generated when a SQL statement crashes and an incident is created in the ADR.
单选题When should the emergency position-indicating radio beacon be activated after abandoning an OSV?（）AImmediatelyBAfter one hourCOnly when another vessel is in sightDOnly after sunset
单选题When can routine communications be resumed on a frequency or channel on which radio silence has been imposed? （）AAfter determining that the frequency or channel appears to be no longer in useBAfter determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communicationsCAfter the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concludedDRoutine communications can resume if，in the Master's opinion，communications on that frequency or channel will not interfere with emergency communications
单选题When can routine communications be resumed when radio silence has been imposed?（）AAfter determining that the frequency or channel appears to be no longer in useBAfter determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communicationsCRoutine communications can resume after the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concludedDIf，in the Master's opinion，communications on that frequency will interfere with emergency communications
单选题When will the float-free emergency position indicating radio beacon be activated after abandoning ship?（）AImmediately after floating freeBAfter about one hour when the salt water activates the batteryCOnly when keyed by the radar of another vesselDOnly when daylight activates the photovoltaic cell
单选题What is the fundamental purpose for imposing radio silence? （）ATo ensure that interference to proprietary communications is minimizedBTo ensure that only voice communications can be effected on the distress frequency or channelCTo ensure that a distressed vessel will have a window twice each hour for transmitting routine messagesDTo ensure that interference on a particular frequency or channel to communications concerning emergency traffic is minimized
单选题Routine radio communications should be no more than（）.Aone minuteBthree minutesCfive minutesDeight minutes
单选题When determining a customer’s technical requirements for a Cisco Unified Communications solution， which important tool can be used to determine the bandwidth used by different codecs with various protocols over different media？（）ANetwork Codec Aggregator ToolBBandwidth Estimator ToolCUnified Communication Bandwidth ToolDVoice Bandwidth CalculatorEVoice Codec Bandwidth Calculator
单选题An on-load release system on a survival craft means the cable can be released（）.Aonly when the load is taken off the cableBonly when there is a load on the cableConly when activated by the controls at the lowering stationDat any time