问题
单项选择题
()will form the basis for distress alerting and safety calling.
A.GMDSS
B.EGC
C.MSI
D.DSC
答案
参考答案:A
()will form the basis for distress alerting and safety calling.
A.GMDSS
B.EGC
C.MSI
D.DSC
参考答案:A