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关于物质的结构,在初中教材中就有三种不同的说法,第一种说法是1994年10月版初中《物理》中的说法,“经过科学家世世代代的研究.现在已经认识到,一切物质都是由分子构成的,分子又是由原子构成的.”;第二种说法是1987年版初中《物理》中的说法:“物质是由许许多多肉眼看不见的分子构成,分子又是由原子构成的,也有一些物质,如金属、是由原子直接构成的.”;第三种说法是1994年10
As for the structure of matter, there are three different versions of textbooks in junior high schools. The first is the statement in the “Physics” of the junior middle school of October 1994 that “after the study of scientists for generations, it is now recognized that everything The material is made of molecules, and the molecules are made of atoms again. ”The second is that of“ physics ”in the 1987 junior middle school:“ The material is composed of many invisible molecules and the molecules Is composed of atoms, there are some substances, such as metal, is formed directly by the atoms. ”The third argument is 1994 10