单项选择题
The NCS of INMARSAT-A system in the AOR-E is in（）.
A.Goonhilly, UK B.Yamaguchi, Japan C.Perth, Australia D.Southbury, USA
单项选择题 Each NCS woks as a type of（）, assisting controlling and monitoring telex and telephone network as quickly as possible.
单项选择题 The position of the AOR-W satellite in the INMARSAT system is（）above the equator.
单项选择题 Geostationary satellite are artificial satellite which（）.
