下列说法中不正确的是 A由一种元素组成的物质一定是单质b在同一种物质中同种元素的化合价可能不相同c混合物可能由同种元素组成d含 Template




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tomski下列说法中不正确的是 a由一种元素组成的物质一定是单质b在同一种物质中同种元素的化合价可能不相同c混合物可能由同种元素组成d含 coloring