Which of the following would be the impedance of an 8 ohm and a 4 ohm speaker that are wired in parallel？（）

单项选择题Whichofthefollowingcancauseghostinginavideoimage？（）

A.Bent pin on an S-Video cable
B.Mislabeled component cables
C.Defective HDMI cable
D.Improperly terminated coax cable

单项选择题Whenintegratingamediaserverintoahometheater，whichofthefollowingtermsBESTdescribesthetechnologyusedtoprotecttheinterestofcopyrightholders（e.g.multimediacontent）？（）

A.Digital Rights Management （DRM）
B.MPEG Layer-3 （MP3）
C.Internet Key Exchange （IKE）
D.Content Management System （CMS）

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