If both the ‘high level’and ‘low level’ alarms come on for the same address of a centralized（集中的） control console, the most likely problem is a/an ______.A.sensor failureB.failed alarmC.low levelD.extremely high level
If both the ‘high level’and ‘low level’ alarms come on for the same address of a centralized（集中的） 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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