单选题If both the “high level” and “low level” alarms come on for the same address of a centralized control console, the most likely problem is a/an （）.Asensor failureBfailed alarmClow levelDextremely high level
单选题
If both the “high level” and “low level” alarms come on for the same address of a centralized control console, the most likely problem is a/an （）.
A
sensor failure
B
failed alarm
C
low level
D
extremely high level
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