单项选择题
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
AccordingtoOhm’sLaw，whichofthefollowingiscorrect？（）A.As...
单项选择题According to Ohm’s Law， which of the following is correct？（）
A.As voltage increases， resistance decreases B.As amperage decreases， resistance decreases C.As resistance decreases， amperage increases D.As resistance increases， voltage increases
