内科医生王某,在春节探家的火车上遇到一位产妇临产,因车上无其他医务人员,王某遂协助产妇分娩。在分娩过程中,因牵拉过度,导致新生儿左上肢臂丛神经损伤。王某行为的性质为
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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