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
A.4 B.9 C.8 D.5
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
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