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.
单项选择题 Ships sailing in（）are able to receive and print out EGC message.
单项选择题 As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
