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1．考查化学方程式表示的意义例1如下图,四位同学正在讨论某一个化学方程式表示的意义．下列四个化学方程式中．同时符合这四位同学所描述情况的是( )．
1. Examining the meaning of the equation of chemical equation Example 1 As the following diagram, four students are discussing the meaning of a chemical equation. The following four chemical equations. At the same time, the situation described by the four students is ().