英语阅读500题（单项选择题）1.IMO has decided决定that all ships over 300TGt must be fitted with a NA VTEX receiver______ .IMO在什么时候决定300总吨以上必须配备NA VTEX接收机。
A. by 01 Feb 1992B. by 01 Aug 1993C. between 01 Feb 1992 and 01 Feb 1999D. before 01 Feb 19922.GMDSS is to provide ______ with reliable可靠的communication .GMDSS提供给--所有客船和300总吨及以上货船在海上航行--的可靠通信。
A. all large passenger vesselsB. freighters of more than 300gt in coastal watersC. all passenger ships and cargo ships engaged in international-voyagesD. all passenger ships and cargo ships of 300gt upwards in open sea3.The complying遵从vessels can transmit ship-to-shore distress alerts by at least ______ .这个遵守船舶（公约船）能发送船到岸遇险报警至少通过--两套分开和独立设备方法，使用不同的无线电通信业务。
A. One means, whether satellite or terrestrial techniquesB. Two means,途径whether无论satellite or terrestrial techniquesC. Two separate and independent独立的means, each using different radio communication servicesD. Two means, such as MF DSC and HF DSC4.The quality of the message can be affected 受到影响by ___ .信息的质量会受--气候--影响。
A. climate气候B. sunshine阳光C. human being人类生存D. both a and b5.Within the polar areas it is ______ to see a satellite in geo-stationary orbit .在两极地区内是--不可能--看到地球静止轨道卫星的轨道。
A. impossibleB. possible可能C. easy 容易D. difficult困难6.The Inmarsat system is open for use by ______ countries on a non-discriminatory无差别对待basis . 国际海事卫星系统对--所有--国家在一个无差别待遇的基础上开放使用。
A. someB. lots ofC. manyD. all7.With the help of GMDSS ______ can be alerted to a distress incident as soon as possible .在GMDSS的帮助下--岸上和海上搜救当局--能尽快发出遇险报警。
A. all ships in a large sea areaB. only the sea authorities ashoreC. the SAR units ashore and at seaD. the port radios and the coast stations8.In areas covered by Inmarsat HF can be used as an ______ to satellite communications.在Inmarsat覆盖地区内高频可以作为一种--替代--卫星通信设施。
A. alternation交替B. alternate代替C. alter更改D. alternative可供选择的事物9.When receiving a distress alert, the SAR authorities ashore and the ships in the vicinity of the ship in distress will ______ in a coordinated search and rescue operation with the minimum delay . 当收到遇险警报时, 岸上SAR当局和遇险船附近的船只将以最小的延误--帮助--协调搜救工作。
A. assist帮助B. send a rescue vessel 派一艘救助船C. search the distress area搜索遇险区域D. reach the distress position at once立即到达遇险位置10.In which year was the COSPAS-SARSAT system established ?哪一年建立低极轨道搜索和营救卫星系统?A. 1980B. 1981C. 1979D. 198211.It is quite相当的______ for an SES operator to send a distress alert .船舶地球站操作员发送遇险警报是十分--简单和有把握的A. easy and expensive容易和昂贵的B. simple and certain简单和有把握的C. dangerous and stable危险和稳定的D. difficult and compulsory困难和强制12.Any ships fitted with SES can ______ and _______ through the satellite system when sending a distress alert . 当发射遇险报警时，任何配备船舶地球站的船舶--有绝对优先权进入系统和通过岸站与…联系A. enter the system / contact an RCCB. access to INMARSAT / establish contact with a CESC. have absolute绝对的priority to enter the system / make contact with a CESD. enter the system gradually逐步地/ wait for rescue13.What’s the advantage when using the satellites ?当使用的卫星有什么优势----该信息范围扩大及改善了信息的接收质量。
A. The message can be directed to the desired location 这个信息能直接到理想的位置B. The messa ge can follow the earth’s curvature 这个信息可以跟随地球的曲率C. The quality of message can not be affected by climatic信息的质量上不受气候影响D. The range of the message extend and the quality of reception is improved该信息范围扩大及改善了信息的接收质量。
14.The DSC frequency for distress alerting in Area A2 is ______ .数字选择性呼叫在A2海区的遇险报警频率是---2187.5KHZA. 2182KHZB. 2174.5KHZC. 2192KHZD. 2187.5KHZ15.What channel is general communication used ? 哪个频道用于一般通信。
A. any appropriate适当的channel except除了，不包括public communicationB. any appropriate channel except-for 除…之外public communicationsC. any appropriate channel besides除…之外，还有public communicationD. any appropriate channel beside在…旁边，无关public communication16.why do some stations keep silence ?为什么一些电台保持沉默呢--他们会影响到遇险通信的传输A. Because they are not engaged参与in the distress traffic 因为他们不参与遇险通信B. they will affect the transmission of the distress traffic他们会影响到遇险通信的传输C. The powers of these stations are very weak 这些电台发射功率非常弱D. They are not in-charge-of负责search and rescue他们不负责搜救。
17.General radio communications in the global system are those between ______ concerning涉及the management and operation of the ships and may have impact-on影响their safety . 一般全球无线电通信系统，在--船站和岸基通信网络—之间涉及到船舶的管理和操作以及对他们的安全产生影响。
A. SAR party and the ship in distress 搜救单元与遇险船B. SAR authorities and the ship in distress and survival craft 搜救当局和遇险船及救生艇C. A ship station and any coast station一个船台与任何岸台D. Ship stations and shore-based communication network船站和岸基通信网络18.It is required that ships proceeding at sea should keep continuous watch on ______ . 要求在海上航行的船舶必须保持连续的值守在--适当的DSC遇险和安全频率A. VHF channels 16 and 13B. Appropriate适当的DSC distress and safety frequencie sC. INMARSAT TDM message channelD. VHF channel 70 and channel 819. The ARQ mode should be applied ___.自动请求重复模式适用于--当两个电台互相通信。