A.Allowstwosatellitetunerstousethesamedish.
B.Connectsthelownoiseblockdownconverter（LNB）tothemulti-switch.
C.Combinessatelliteandovertheair（OTA）signals.
D.AllowsoneLNBtousetwosatellites.
参考答案：C
AAllowstwosatellitetunerstousethesamedishBConnectsthelown
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