你可能感興趣的試題

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

單項(xiàng)選擇題

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