单项选择题
In INMASAT-A service code 32（）.
A.medical assistance B.medical advise C.maritime assistance D.technical assistance
单项选择题 To establish a communication channel for the telex service in the INMARSAT-A terminal, you should first（）.
单项选择题 What part of the Inmarsat will the SES get access to if the commissioning is successful?（）
单项选择题 Without permission of（）, a ship earth station can not enter the system.
