The advantage of geostationary satellites is（）.<br>A:the range of antenna can cover everywhere in the world<br>B:we can know the ship’s exact position<br>C:that the distress alert can be located as soon as possible<br>D:antenna of permanent earth stations may be directed towards fixed points in the sky

The advantage of geostationary satellites is（）.
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

出自：海船船员证

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