T3网管上报ZXCTN设备保护倒换事件告警时，由于保护组倒换仅出现一瞬间，而不是持续告警，因此告警出现后就转入到锁定告警里面。When T3 EMS reports protection switching event alarm of ZXCTN equipment, because protection group switching only happens instantaneously and the alarm does not last, alarm event state turns into lock alarm state.
（A）对
（B）错
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