单项选择题
A.Allows two satellite tuners to use the same dish. B.Connects the low noise block down converter （LNB） to the multi-switch. C.Combines satellite and over the air （OTA） signals. D.Allows one LNB to use two satellites.
Whichofthefollowingistheprimarypurposeofimpedancematche...
单项选择题Which of the following is the primary purpose of impedance matched volume control？（）
A.Maintains proper speaker phase B.Protects the amplifier from damage C.Protects the digital systems from damage D.Amplifies the speaker signal
Thenativeresolutionfor1080iis（）A.1920×1280B.1920×1080C....
单项选择题The native resolution for 1080i is（）
A.1920×1280 B.1920×1080 C.1280×1080 D.1280×720
Eachtimethedistancefromthespeakerisdoubled，volumedecrea...
单项选择题Each time the distance from the speaker is doubled， volume decreases by（）.
A.3dB B.6dB C.12dB D.24dB
