GMDSS通信英语题库1.doc

GMDSS英语阅读500题单选题一第三部份　英语阅读单项选择题 1.??????? IMO has decided that all ships over 300TGt must be fitted with a NAVTEX receiver ___B__ .A. by 01 Feb 1992???????????????????????? B. by 01 Aug 1993C. between 01 Feb 1992 and 01 Feb 1999?????? D. before 01 Feb 19922.牋牋牋?GMDSS is to provide _D_____ with reliable communication .A. all large passenger vessels牋牋牋牋牋?B. freighters of more than 300gt in coastal waters C. all passenger ships and cargo ships engaged in international-voyages牋?D. all passenger ships and cargo ships of 300gt upwards in open sea3.牋牋牋?The complying vessels can transmit ship-to-shore distress alerts by at least __ B.____B .A. One means, whether satellite or terrestrial techniques牋牋牋 B. Two means, whether satellite or terrestrial techniques????? C. Two separate and independent means, each using different radio communication services??? D. Two means, such as MF DSC and HF DSC4.The quality质量 of the message can be affected by ____A__ .A. climate气候??????? B. sunshine?????? C. human beings????? D. both a and b 5、Within the polar areas it is __A____ to see a satellite in geo-stationary orbit .A. impossible????? B. possible?????? C. easy?????????? D. difficult 6.The Inmarsat system is open for use by ____D__ countries on a non-discriminatory无区别 basis .A. some????????? B. lots of???????? C. many????????? D. all7.With the help of GMDSS ___C__ can be alerted to a distress incident as soon as possible .CA. all ships in a large sea area??????????? B. only the sea authorities ashoreC. the SAR units ashore and at sea??????? D. the port radios and the coast stations8.In areas covered by Inmarsat，HF can be used as an ___D___ to satellite communications.A. alternation????? B. alternate????????? C. alter?????? D. alternative替代，名词9.When receiving a distress alert, the SAR authorities ashore and the ships in the vicinity of the ship in distress will ____A__ in a coordinated search and rescue operation with the minimum delay .A. assi