單項(xiàng)選擇題The broadcast of MSI is made on two dedicated systems. “dedicated” means（）.
A.special
B.different
C.expensive
D.valuable
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1.單項(xiàng)選擇題A SART can be fixed on（）.
A.a mother ship
B.a lifeboat
C.a life craft
D.all of A,B,C
2.單項(xiàng)選擇題All stations which receive a distress alert shall immediately cease（）.
A.any transmission
B.any harmful transmission
C.to use radiotelephone
D.using radiotelephone
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If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
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Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.
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At least two two-way VHF radiotelephone apparatus shall be provided on every cargo ship of（）tons gross tonnage and upwards but less than 500 tons gross tonnage.
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In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.
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The advantage of geostationary satellites is（）.
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