某高校食堂厨师在做菜时,误将仓库中的毒鼠药当菜油用于炒菜,致使许多学生中毒,但因抢救及时,未造成任何伤亡。该厨师的行为( )
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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