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


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1.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

2.單項(xiàng)選擇題（）communication are intership VHF radio telephone communication.

A.ship-to-shore
B.shore-to-ship
C.bridge-to-bridge

3.單項(xiàng)選擇題The INMARSAT system is open for use by（）countries on a non-discriminatory basis.

A.some
B.lots of
C.many
D.all

4.單項(xiàng)選擇題Within the polar areas it is（）to see a satellite in geostationary orbit.

A.impossible
B.possible
C.easy
D.difficult

5.單項(xiàng)選擇題The position of INMARSAT AOR-W satellite is（）above the equator.

A.55.5 W
B.180E
C.15.5W
D.64.5E