單項(xiàng)選擇題

Any ship fitted with SES can（）and（）through the satellite system when sending a distress alert.

A.enter the system/ contact an RCC
B.access to INMARSAT/establish contact with a CES
C.have absolutely priority to enter the system/make contact with a CES
D.enter the system gradually/wait for rescue

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單項(xiàng)選擇題

Actually, the date for entry into effect will be 1st February（）.Though the text does not tell us about it.

A.1995
B.1998
C.1999
D.2000

單項(xiàng)選擇題

The GMDSS must combine all various subsystems, because（）.

A.they all have different limitations with respect to coverage
B.they all have different limitations in the technology they use
C.different systems apply to different ships
D.all of above