A.multi-roomaudio，telephone，intercomandtemperaturecontrol.
B.thermostat，CCTV，smokedetectorsandkeypads.
C.hometheater，lightingcontrolandmulti-roomaudio.
D.video，digitalcable，andsatelliteapplications.
参考答案：D
Amulti-roomaudiotelephoneintercomandtemperaturecontrolB
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