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教科版小学科学四年级上册的第一单元主要研究的是溶解。在前三节课的学习中,学生已基本了解了什么是溶解,了解了固体和液体在水中的溶解情况。第四节课则主要通过对比实验,研究不同的物质在水中的溶解能力是不同的。在
Textbook Primary School Science Year 4 The first unit is the main study of dissolution. In the first three lessons, students have a basic understanding of what dissolves and how solids and liquids dissolve in water. The fourth lesson mainly through the comparative experiment, the study of different substances in water dissolving ability is different. in