甲为一开发商,乙为一苗圃经营商,甲将已出卖的楼房的房顶租与乙进行苗圃种植。因乙在房顶种植花草浇水引起纠纷。以下表述正确的是:()
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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