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例对牙膏的探究要用到许多化学知识。(1)下表列出了三种牙膏中的摩擦剂,请在表中填写三种摩擦剂所属的物质类别。
Examples of the exploration of toothpaste use a lot of chemical knowledge. (1) The following table lists the three types of toothpastes in the toothpaste. Please fill in the table with the substance classes to which the three friction agents belong.