单项选择题 The maritime access code of telephone mode in INMARSAT-A terminal for the IOR is（）.

单项选择题 When you have received GA+ from the CES for the INMARSAT-A telex communication, you should immediately select（）and（）you required.

单项选择题 The maritime access code for the AOR-E is（）in INMARSAT-A Telex Service.