题目

Some people believe that greed and selfishness has become the basis of modern society, and we should return to the old traditions of family and community then we will have a better life. To what extent do you agree or disagree with the above opinion? In this fast-paced world, many values are undergoing major changes. While people traditionally prioritize caring, sharing and generosity in life and work, modern people seem to be more self-absorbed and self-concerned. Modern people act selfishly to survive the harsh competition of life. They say that it is a jungle out there. To survive, you have只含有碳、氢或碳、氢、氧的物质充分燃烧后的产物均为CO2和H2O．相同分子数目的①C2H5OH ②CH3OH ③CH4 ④C2H4分别充分燃烧，所消耗O2的质量相等的是（　　）A．①③B．②③C．②④D．①④