单项选择题
A.besides the polar regions B.including the North Pole and the South Pole C.above 70N and below 70S D.as far north and south 70
The Inmarsat system has five major components, they are...
单项选择题The Inmarsat system has five major components, they are:（）.
A.Space segment, NCC, RCC, SES and CES B.Space Segment, a satellite system, C system, NCC and NCS C.Space Segment, NCC, NCS,CES and SES D.A system, C system, satellite system, earth stations and NCS
The INMARSAT consists of（）major components.A.4B.9C.8D.5
单项选择题The INMARSAT consists of（）major components.
A.4 B.9 C.8 D.5
why should the SES operators be very careful when the s...
单项选择题why should the SES operators be very careful when the ship enters the area where three ocean regions overlap? Because（）.
A.the weather over there is always terrible B.the condition there is complicated C.the signals are too strong D.their SES may receive the signals from unwanted satellite
