单项选择题
A.cannot
B.are not allowed
C.have the right
D.should get permission to
单项选择题 The list of Coast Stations is republished()in a trilingual.
单项选择题 Having studied the INMARSAT document, GMDSS document, SOLAS Convention and other international navigation documents, we all know that the Chapter IV of SOLAS Convention is mainly about().
单项选择题 Stations are grouped by countries arranged in the()order of their country symbols.