Communication satellites relay ( ) zuoy
A. voice
B. video
C. repeater
D. data signals
查看答案
The satellite must have ( )
A. a receiver
B. a receiver antenna
C. a transmitter and a transmit antenna
D. electrical power
Modern communications satellites use a variety of orbits, including ( ).
A. geostationary orbits
B. Molniya orbits
C. elliptical orbits
D. low (Polar and non-polar) earth orbits
Satellites communication has many advantages including ( ).
A. less costly for transmission over extremely long distances
B. a communication signal can be sent to any number of reception points simultaneously
C. extremely flexible
D. the sending and receiving points can be changed
If the signal from the satellite is stronger, receiving station will be ( )
A. smaller
Bigger
C. more costly
D. less costly
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