单选题 1分

Both the satellite communication and terrestrial communications will______

  • A.be used in the GMDSS
  • B.be used only for general communications
  • C.be replaced by Morse
  • D.not be used in the GMDSS

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1 单选题 1分
  • A.short-range and long-rang radio system
  • B.INMARSAT and COSPAS-SARSAT
  • C.long-range and tcrrestrial radio system
  • D.the terrcstrial and satcllite communication systems
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  • A.location and capacity of the facilities located on board ships
  • B.position and type of a ship station
  • C.capacity and location of shore based communication facilities
  • D.position and capacity of mobile communication stations
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  • A.besides over polar regions
  • B.including the North Pole and the South Pole
  • C.above 70°N and below 70°S
  • D.as far North and South as 70°
4 单选题 1分