操回军攻冀州袁尚时,谁为他献上水淹之计?请简述过程?
许攸献计曰:“何不决漳河之水以淹之?”操然其计,先差军于城外掘壕堑,周围四十里审配在城上见操军在城外掘堑,却掘得甚浅遂不为备当夜曹操添十倍军士并力发掘,比及天明,广深二丈,引漳水灌之,城中水深数尺。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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