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Do you want to live another 100 years or more? Some experts say that scientific advances will one day enable humans to last tens of years beyond what is now seen as the natural limit of the human life span. I think we are knocking at the door of immortality（永生）, said Michael Zey, a Montclair State University business professor and author of two books on the future. I think by 2075 we will see it and that’s a conservative estimate. At the conference in San Francisco, Donald Louria, a professor at New Jersey Medical School in Newark said advances in using genes as well as nanotechnolog将下列物质按酸、碱、盐分类排列，正确的是A．硫酸纯碱硫酸钙B．氢氯酸烧碱硫酸亚铁C．碳酸乙醇烧碱D．磷酸熟石灰苛性钠