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1.柳州的冬天常出现霜冻现象,去年冬天,柳江、柳城两个主要产蔗基地因受“霜害”,大片甘蔗被冻坏,造成蔗糖减产。霜是空气中的蒸气_____而成的。[点评]判断、解释物态变化现象的关键是:正确分析理解物质变化前后处的状态以及形成过程。霜是空气中的水蒸气直接凝华成小冰晶附着在物体表面上,所以本题答案应填:凝华。
1. The phenomenon of frost often occurs in Liuzhou in the winter. Last winter, the two main sugarcane production bases in Liujiang and Liucheng suffered frost damage and the large sugar cane was frozen, resulting in a decline in sugar production. Cream is made of _____ steam in the air. [Comments] The key to judging and interpreting the phenomenon of change in the state of matter is to correctly analyze and understand the state and formation process before and after the change of matter. The frost is the direct condensation of water vapor in the air into small ice crystals attached to the surface of the object, so the answer to this question should be filled in: Sublimation.