问题
单项选择题
The COSPAS-SARSAT 406MHZ system was adopted as an element of the GMDSS by IMO in（）.
A.1992
B.1980
C.1984
D.1988
答案
参考答案：D
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The COSPAS-SARSAT 406MHZ system was adopted as an element of the GMDSS by IMO in（）.
A.1992
B.1980
C.1984
D.1988
参考答案：D