Radar、DNA都是首字母拼读词。
Radar、DNA都是首字母拼读词。
参考答案和解析
Occupied Room;Occupied Dirty
?
OCC;OD
?
OCC;OD
相关考题：
My radar is not working．I require shorebased radar assistance．Is shorebased radar assistance ________ ？A.usedB.availableC.in useD.can be used
The description Racon beside an illustration on a chart would mean a ______.A.radar conspicuous beaconB.circular radiobeaconC.radar transponder beaconD.radar calibration beacon
当向一位顾客书写电子邮件时，你应该：（）A、使用大写字母，以着重体现关键词B、使用情感符号，以表示感情或语调C、使用首字母缩写词和省略词，以使其简洁D、确保阅读邮件的顾客明白邮件的主题是什么
单选题Which conditions will normally cause a SART to operate in the active mode?（）AIt will respond only to interrogation by 9-Ghz radar signalsBA SART will normally respond to interrogation from a searching vessel's radar if the radar antenna is at least 15 meters highCA SART will normally respond to interrogation from a searching aircraft's radar if the radar's output power is at least 10，000 watts and the aircraft is at a height of 3000 feet and within 30 nautical milesDAll of the above
单选题Which statement is true concerning a vessel equipped with operational radar?（）.AThe Master of the vessel must be on the bridge when the radar is in useBThe radar equipment is only required to be used in restricted visibilityCThe use of a radar excuses a vessel from the need of a look-outDThis equipment must be used to obtain early warning of risk of collision
单选题My radar is not working.I require shore based radar assistance.Is shore based radar assistance（）?AusedBavailableCin useDcan be used
单选题Which general statement concerning radar is FALSE?（）.ARaising the antenna height increases the radar rangeBThe ability of radar to detect objects is unaffected by weather conditionsCRadar bearings are less accurate than radar rangesDRadar should be checked regularly during clear weather to ensure that it is operating properly
单选题If there is any doubt as to the proper operation of a radar，which statement is TRUE?（）.AOnly a radar expert can determine if the radar is operatingBAll radars have indicator lights and alarms to signal improper operationCA radar range compared to the actual range of a known object can be used to check the operation of the radarDThe radar resolution detector must be energized to check the radar
单选题The closest point of approach (CPA) of a contact on a relative motion radar may be determined（）.Aimmediately when the contact is noted on radarBonly if the radar scope is watched constantlyCafter the contact has been marked at least twiceDby an occasional glance at the radar
单选题Which statement is TRUE concerning a vessel equipped with operational radar?（）.AShe must use this equipment to obtain early warning of risk of collisionBThe use of a radar excuses a vessel from the need of a look-outCThe radar equipment is only required to be used in restricted visibilityDThe safe speed of such a vessel will likely be greater than that of vessels without radar