When integrating a media server into a home theater， which of the following terms BEST describes the technology used to protect the interest of copyright holders （e.g. multimedia content）？（）

单项选择题Whichofthefollowingisadiplexerusedfor？（）

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.

单项选择题Whichofthefollowingistheprimarypurposeofimpedancematchedvolumecontrol？（）

A.Maintains proper speaker phase
B.Protects the amplifier from damage
C.Protects the digital systems from damage
D.Amplifies the speaker signal

单项选择题Thenativeresolutionfor1080iis（）

A.1920×1280
B.1920×1080
C.1280×1080
D.1280×720

单项选择题Eachtimethedistancefromthespeakerisdoubled，volumedecreasesby（）.

A.3dB
B.6dB
C.12dB
D.24dB

单项选择题AccordingtoOhm’sLaw，whichofthefollowingiscorrect？（）

A.As voltage increases， resistance decreases
B.As amperage decreases， resistance decreases
C.As resistance decreases， amperage increases
D.As resistance increases， voltage increases