将少量粉末状的樟脑装入烧瓶,用酒精灯缓缓加热,封闭在瓶内的树

将少量粉末状的樟脑装入烧瓶,用酒精灯缓缓加热,封闭在瓶内的树枝上逐渐出现玲珑洁白的“人造雪景”,取出树枝,美丽的“雪景”会慢慢消失,消失时发生的物态变化是:

A、汽化;    B、液化;    C、升华;    D、凝华.

答案

C

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