相关考题
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单项选择题
The existing terrestrial radio system has a number of basic flaws which（）.
A.can be overcome by using traditional techniques
B.cannot be overcome by satellite system
C.can be overcome by satellite and digital techniques
D.cannot be tackled by any modern system -
单项选择题
From the ship owner’s point of view,（）is the most important advantage Inmarsat providing with.
A.business opportunity
B.good-quality radio telephone conversations
C.telex service
D.both B and C -
单项选择题
Ships sailing in（）are able to receive and print out EGC message.
A.a fixed area or Navarea in any ocean region
B.a Navarea or weather forecast area
C.the designated area or given geographic position
D.anywhere of the world
