单项选择题
Which of the following would be the impedance of an 8 ohm and a 4 ohm speaker that are wired in parallel？（）
A.2.66 ohms B.Less than 1 ohm C.4 ohms D.12 ohms
单项选择题 Whichofthefollowingcancauseghostinginavideoimage？（）
单项选择题 Whenintegratingamediaserverintoahometheater，whichofthefollowingtermsBESTdescribesthetechnologyusedtoprotecttheinterestofcopyrightholders（e.g.multimediacontent）？（）
单项选择题 Whichofthefollowingisadiplexerusedfor？（）
