题目

When I was a child I never said, When I grow up, I want to be a CEO, but here I am. When I look back on my career, I realize the road to becoming a CEO isn't a straight, clear path. In fact, no two paths are the same. But whether you want to be a boss one day or not, there's a lot to learn from how leaders rise to the top of successful companies.         As this series of stories shows, the paths to becoming a CEO may be different, but the people in that position(位置) share the qualities of commitment（义务）, work ethic（道德） and a strong desire for building someth在常温下，A和B两种气体组成的混合气体（A的相对分子质量大于B的相对分子质量），经分析，混合气体中只含有碳和氧两种元素，而且，不论A和B以何种比例混合，氧和碳的质量比均大于8/3，由此可以确定A为______，B为______．（写出化学式）