单项选择题
During a（）period, as a newly commissioned SES, your IMN will be past to the other CESs.
A.20 hour B.12 hour C.24 minute D.24 hour
单项选择题 The Inmarsat SES operator can choose the most suitable CES according to（）.
单项选择题 The Network Coordination Station for the INMARSAT-A coast stations in the Pacific ocean region is in（）.
单项选择题 The NCC is located in the（）.
