A.repairs
B.repairing
C.repaired
D.being repaired
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A.which is assisted
B.that assist you
C.when you assisted
D.when being assisting
A.the range of antenna can cover everywhere in the world
B.we can know the ship’s exact position
C.that the distress alert can be located as soon as possible
D.antenna of permanent earth stations may be directed towards fixed points in the sky
A.which
B.on which
C.at which
D.in which
A.it necessary
B.it is necessary
C.it necessary to
D.necessary
A.depend on
B.depending on
C.dependent on
D.depended on
最新試題
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.
Radio communication（）for many years and helps to save tens of thousands of lives.
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.
Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.
SOLAS ships shall be equipped with（）.
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.
Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.
Please use（）for（）.
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.
On-scene communications will normally take place between（）.