A.fixed
B.matched
C.fitted
D.equal
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A.square
B.triangle
C.circle
D.rectangle
A.cannot
B.are not allowed
C.have the right
D.should get permission to
A.every two years
B.every three years
C.every year
D.every four years
A.the radio regulations
B.the technical terms and definitions
C.how to operate the GMDSS SES equipment
D.Maritime Communications
A.alphabetical
B.figure
C.name of stations
D.series
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（）will form the basis for distress alerting and safety calling.
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.
Every lifeboat which is fitted with a fixed two-way vhf radiotelephone apparatus with（）which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.
On-scene communications will normally take place between（）.
Ship-to-ship distress alerting should be conducted by（）.
The rescue coordination center may（）on stations which interfere with traffic.
The priority of EGC messages is classified by（）.
SOLAS ships shall be equipped with（）.
Radio communication（）for many years and helps to save tens of thousands of lives.
Radiotelephony communication or radio telex communication or both will be carried out by terrestrial or satellite means,（）the equipment fitted on ship and the area in which the incident occurs.