单项选择题
Which of the following is the correct wiring order for an RJ-11 two line jack？（）
A.Black，Green，Red，Yellow
B.Black，Red，Green，Yellow
C.Red，Black，Green，Yellow
D.Yellow，Red，Green，Black
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A.The sensor itself
B.The way the zones are wired
C.The zone type
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WhichofthefollowingisaRFpeertopeermeshprotocolusedforlightingandotherresidentialelectronics？（）
A.Z-Wave
B.X10
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WhichofthefollowingisMOSTlikelycausinganintermittentflashingLEDonanIRreceiverwhentheremotecontrolisnotbeingused？（）
A.The power supply is faulty and should be replaced.
B.The heat from a heating， ventilation， and air conditioning （HVAC） register is being received as infrared noise.
C.The radio frequency interference （RFI） is being received as noise.
D.A plasma display is emitting infrared noise.
