冻结速度快,食品组织内冰层推进速度小于水移动速度,冰晶的分布越接近天然食品中液态水的分布情况,冰晶数量极多,呈针状细小结晶体。()
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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